(With all merchandise 50 per cent off, many Iqaluit residents were stocking up on big ticket items. Photo: Kent Driscoll/APTN)The store looks remarkably untouched on the inside.A double firewall and five metres of space separated the warehouse from the sales floor.There is a noticeable smoky smell remaining.All of the fresh food in the store was disposed after the fire, and the fate of the rest was decided on a case by case basis.“The fresh food absolutely had to go,” said David Chatyrbok, vice president of major markets for the Northwest Company. “We worked with the health inspector, identified all the different product that had to go, so that product had to go.“Then everything we could donate, we absolutely worked with the health department to make sure we knew what could be donated, and we are donating that food.”(The lines were long, but deals were there for those who could bear the wait. Photo: Kent Driscoll/APTN)According to the Northwest Company, reopening the store was a 24 hours a day task that was happening right up until the moment they opened the doors.“This was the local individuals that did all of this work for us. We have to thank the community, the first responders, and all of our staff,” said Chatyrbok.While most departments have reopened, the meat and frozen food sections still require some more product.Until the meat shop is clean and repaired, butchering will take place in the Northern Store in nearby Pangnirtung, and the cuts of meat will then be flown to Iqaluit.firstname.lastname@example.org@kentdriscoll Kent DriscollAPTN NewsIn just nine days, Iqaluit’s Northmart has gone from a raging fire to a fire sale, with residents lining up at 9 am on Saturday morning to get in on some of the savings.Northmart supplies Iqaluit with about 60 per cent of the groceries, and is the largest retail store in the city.On November 8, fire destroyed the Northmart’s warehouse, furniture store and snowmobile shop.The retail and grocery stores were saved.A 17 year-old girl is facing a charge of arson endangering human life following the fire.(On Nov. 8, thick black smoke blanketed Iqaluit. Photo: Kent Driscoll/APTN)More than a week later, the fresh food has been replaced, and all retail merchandise was 50 per cent off.For many residents, the sales were a draw, but the selection provided by having the largest retail store in the territory back was appreciated.“I’m excited for the store to reopen,” said Elisapee Nowdluk just as the doors were opening. “It’s a big store based for groceries, and I miss that, the bakery, and the meat.”
Related Items:#magneticmedianews Recommended for you Facebook Twitter Google+LinkedInPinterestWhatsAppTurks and Caicos, February 27, 2017 – Providenciales – His Excellency the Governor visited the Department for Disaster Management and Emergencies (DDME) in Providenciales on 24 February. Commenting on his visit the Governor said:“Proper preparation for potentially hazardous events, whether a hurricane, flooding or other disaster, is crucial to public safety. I therefore have brought forward the timelines for contingency meetings and planning on the part of the Public and Emergency Services before the crucial period from June onwards. Our first meeting of ministries and services was held last month and others, including of the Executive Policy Committee, as well as a disaster preparedness exercise, are scheduled for March. As part of my own preparations I have engaged closely with DDME and used my first visit to the department’s main offices to meet the staff and review facilities and contingent supplies and communications systems. I was impressed by the commitment and professionalism of the DDME team. I was reminded also however of the requirement for all relevant government ministries and services to play their role in the work of preparation. People in TCI deserve no less than proper preparations on their behalf and the best protection it is possible to provide.” #MagneticMediaNews Electricity Cost of Service Study among the big agenda items at September 11 Cabinet meeting ALERT # 2 ON POTENTIAL TROPICAL CYCLONE NINE ISSUED BY THE BAHAMAS DEPARTMENT OF METEOROLOGY THURSDAY 12TH SEPTEMBER, 2019 AT 9 PM EDT The Luxury of Grace Bay in Down Town Provo Facebook Twitter Google+LinkedInPinterestWhatsApp
Here’s something fun to chew on over the long holiday weekend:The human resources department at Cygnus might have stumbled upon the as-yet undiscovered key to increasing the bottom line: Wearing jeans … on Tuesdays.According to an e-mail sent to staffers this week from HR vice president Judy Heidebrecht, employees will be permitted to wear “nice” jeans to work next Tuesday, May 27—as long as they are “even more productive.”So, trade in your suit pants and skirts, folks. Jeans = productivity! Here’s the e-mail:From: “Judy Heidebrecht” Date: May 22, 2008 7:08:47 PM EDTSubject: Blue Jean TuesdayAt the request of a few people who said they would be even more productive if they could wear blue jeans more often . . . we’ve agreed to test that theory!Next Tuesday, May 27, will be a casual day, so feel free to wear nice jeans, just like you would on Friday. Now, here’s the deal. If the folks who were preaching productivity-in-denims are correct – we could have more casual-wear-days more often. Let your co-workers and supervisors know what you think!Mike, Dave, Judy
Spotify and most other streaming services rely on compressed audio, which robs the listener of full fidelity. Enter Tidal, the only “major” service that delivers lossless audio — meaning at least on par with CD quality, if not better. Want to see (er, hear) the difference for yourself? Grab this excellent extended trial while you can. It’s just $6 for three months, and it’s good for up to six listeners. Sarah Tew/CNET Turo is kind of like Uber meets Airbnb: You borrow someone’s car, but you do all the driving. I’ve used it many times and found it a great alternative to traditional car-rental services — in part because you get to choose exactly the vehicle you want (not just, say, “midsize”) and in part because you can often do pickup and dropoff right outside baggage claim.Between now and Sept. 1, the first 300 people to check out can get $30 off any Turo rental with promo code LDW30. See It Sprint Turo: Save $30 on any car rental I thought this might be a mistake, but, no, the weirdly named HP Laptop 15t Value is indeed quite the value at this price. Specs include an Intel Core i7 processor, 12GB of RAM, a 256GB solid-state drive and a 15.6-inch display. However, I strongly recommend paying an extra $50 to upgrade that display to FHD (1,920×1,080), because you’re not likely to be happy with the native 1,366×768 resolution. Angela Lang/CNET Uber,I’m shocked — shocked! — to learn that stores are turning Labor Day into an excuse to sell stuff. Wait — no, I’m not. As much as I respect the original intent of the holiday (which became official back in 1894), to most of us, it’s just a bonus day off — one that’s blissfully tacked onto a weekend. So, yeah, stores; go ahead, run your sales. I’m listening. Perhaps unsurprisingly, Labor Day doesn’t bring out bargains to compete with the likes of Black Friday (which will be here before you know it), but there are definitely some sales worth your time.For example:We’ve rounded up the best Labor Day mattress deals.We’ve also gathered the best Labor Day laptop deals at Best Buy.The 2019 Vizio P Series Quantum is back under $999.Be sure to check out Amazon’s roughly three dozen Labor Day deals on TVs and audio. Google Express is having a big sale as well, one that includes deals on game consoles, AirPods, iPhones, laptops and more.Below I’ve rounded up a handful of individual items I consider to be the cream of the crop, followed by a handy reference guide to other Labor Day sales. Keep in mind, of course, that products may sell out at any time, even if the sale itself is still running. Note that CNET may get a share of revenue from the sale of the products featured on this page. 0 Recently updated to include digital-photo-frame capabilities, the Lenovo Smart Clock brings Google Assistant goodness to your nightstand. It’s a little smaller than the Amazon Echo Show 5, but also a full $30 less (and tied with Prime Day pricing) during this Best Buy Labor Day sale. Read DJI Osmo Action preview Review • iPhone XS review, updated: A few luxury upgrades over the XR An Echo Dot makes a fine match for any Fire edition TV, because you can use the latter to say things like, “Alexa, turn on the TV.” Right now, the 24-inch Insignia Fire TV Edition starts at just $100, while the 32-inch Toshiba Fire TV Editions is on sale for $130. Just add any Fire TV Edition to your cart, then add a third-gen Echo Dot, and presto: The latter is free. The problem with most entry-level laptops: They come with mechanical hard drives. That makes for a mighty slow Windows experience. This Lenovo model features a 128GB solid-state drive, so it should be pretty quick to boot and load software, even with its basic processor. Plus, it has a DVD-burner! That’s not something you see in many modern laptops, especially at this price. Amazon TVs Speakers Mobile Accessories Cameras Laptops Automobiles Smart Speakers & Displays Share your voice $6 at Tidal Post a comment Free Echo Dot with an Insignia or Toshiba TV (save $50) Lenovo Smart Clock: $59.99 (save $20) Tags CNET may get a commission from retail offers. HP Laptop 15t Value: $520 (save $780) Use promo code 19LABOR10 to get an unusually good deal on JBL’s interesting hybrid product — not quite headphones, and not quite a traditional speaker, but something you wear like neckphones to listen to music on the go. $59 at eBay Google Nest Hub: $59 (save $70) Formerly known as the Google Home Hub, Google’s Nest Hub packs a wealth of Google Assistant goodness into a 7-inch screen. At $59, this is within a buck of the best price we’ve seen. It lists for $129 and sells elsewhere in the $89-to-$99 range.This is one item of many available as part of eBay’s Labor Day Sale (which, at this writing, doesn’t specifically mention Labor Day, but that’s how it was pitched to us). $261 at Daily Steals via Google Express JBL Soundgear wearable speaker: $90 (save $160) What’s cooler: A snapshot of a firework exploding in front of you, or full 360-degree video of all the fireworks and all the reactions to seeing them? Oooh, ahhh, indeed. At $250, the compact Rylo dual-lens camera is selling for its lowest price yet. And for an extra $50, you can get the bundle that includes the waterproof housing.This deal runs through Sept. 3; it usually costs $500. See at Amazon Chris Monroe/CNET Rylo See it Sarah Tew/CNET Though not technically a Labor Day sale, it’s happening during Labor Day sale season — and it’s too good not to share. Nationwide Distributors, via Google Express, has just about the best AirPods deal we’ve seen (when you apply promo code ZBEDWZ at checkout). This is for the second-gen AirPods with the wireless charging case. Can’t imagine these will last long at this price, so if you’re interested, act fast. Turo Post a comment Other Labor Day sales you should check out Best Buy: In addition to some pretty solid MacBook deals that have been running for about a week already, Best Buy is offering up to 40% off major appliances like washers, dryers and stoves. There are also gift cards available with the purchase of select appliances. See it at Best BuyDell: Through Aug. 28, Dell is offering an extra 12% off various laptops, desktops and electronics. And check back starting Aug. 29 for a big batch of Labor Day doorbusters. See it at DellGlassesUSA: Aug. 29 – Sept. 3 only, you can save 65% on all frames with promo code labor65. See it at GlassesUSALenovo: The tech company is offering a large assortment of deals and doorbusters through Labor Day, with the promise of up to 56% off certain items — including, at this writing, the IdeaPad 730S laptop for $700 (save $300).See it at LenovoLensabl: Want to keep the frames you already love and paid for? Lensabl lets you mail them in for new lenses, based on your prescription. From now through Sept. 2 only, you can save 20% on the blue light-blocking lens option with promo code BLOCKBLUE. See it at LensablSears: Between now and Sept. 7, you can save up to 40% on appliances (plus an additional 10% if you shop online), up to 60% on mattresses, up to 50% on Craftsman products and more. The store is also offering some fairly hefty cashback bonuses. See it at SearsNote: This post was published previously and is continuously updated with new information.CNET’s Cheapskate scours the web for great deals on tech products and much more. For the latest deals and updates, follow the Cheapskate on Facebook and Twitter. Questions about the Cheapskate blog? Find the answers on our FAQ page, and find more great buys on the CNET Deals page. Read Google Home Hub review See It Tags $60 at Best Buy $210 at Best Buy $999 Share your voice Preview • iPhone XS is the new $1,000 iPhone X DJI Osmo Action camera: $261 (save $89) Read Lenovo Smart Clock review Sarah Tew/CNET Apple AirPods with Wireless Charging Case: $155 (save $45) Mentioned Above Apple iPhone XS (64GB, space gray) Best Buy Apple iPhone XS $90 at Daily Steals via Google Express The Cheapskate Mobile Roadshow Tidal 3-month family subscription: $5.99 (save $54) $999 Uber is going public. Hemant Mishra/Mint via Getty Images Uber on Friday set a price range of $44 to $50 a share for its initial public offering, according to an updated filing with the US Securities and Exchange Commission. The ride-hailing company plans to offer 180 million shares and seeks to raise about $9 billion in its IPO.The San Francisco-based company will list on the New York Stock Exchange using the ticker symbol UBER. Its IPO could come as soon as early May.On Friday, payment service PayPal also said it’ll invest $500 million into Uber as it extends a partnership the companies have maintained since 2013.In its IPO filing, Uber said it has operations in more than 700 cities in 63 countries on six continents. More than 91 million people use one of its services, which includes food delivery, at least once a month, the company said. Its drivers reportedly complete 14 million trips every day. If all goes as planned, 2019 will be a big year for tech IPOs. Airbnb, Pinterest and Slack are also expected to go public. Uber arch-rival Lyft issued its IPO in March with a strong stock market debut, but has faltered some since then. Lyft shares were trading around $56 on Friday, well below their $72 IPO price. Uber didn’t immediately respond to a request for comment. $520 at HP $999 Boost Mobile DJI’s answer to GoPro’s action cameras is rugged little model that’s shockproof, dustproof and waterproof down to 11 meters. It normally runs $350, but this deal drops it to $261 when you apply promo code 19LABOR10 at checkout. See It Best laptops for college students: We’ve got an affordable laptop for every student. Best live TV streaming services: Ditch your cable company but keep the live channels and DVR. $999 $299 at Amazon 0 $155 at Google Express Read the Rylo camera preview Sarah Tew/CNET Read the AirPods review Lenovo 130-15AST 15.6-inch laptop: $210 (save $90) Rylo 5.8K 360 Video Camera: $250 (save $250) See at Turo
TwitterPresident Ramnath Kovind’s speech addressing both houses of the Parliament in a joint session on Thursday morning was attended by all political leaders including Congress chief Rahul Gandhi.While President Kovind explained what the newly elected BJP government should focus on, and its objectives for the next five years, the camera caught Rahul Gandhi not paying attention to the President’s speech but was browsing his phone.Habitual offender @RahulGandhi does it again! Sitting on the first bench in the parliament he’s curtly ignoring the President’s speech. Repeatedly showing disrespect to even the biggest constitutional positions only shows his superiority complex! pic.twitter.com/Top8OoFOpU— Priti Gandhi (@MrsGandhi) June 20, 2019The Congress President, who lost by a thumping a massive margin in the recently held general elections, was sitting next to his mother, Sonia Gandhi, and was concentrating on his phone, not paying heed to what Kovind was saying.Prime Minister Narendra Modi and other senior leaders were also in attendance.President Kovind began his speech congratulating all lawmakers, who had taken their oaths and wished them all the best.He had said, “In this Lok Sabha more than half MPs are first-time lawmakers, the number of women MPs is at an all-time high at 78. This is unprecedented. It represents New India.”He added, “In this Lok Sabha elections, more than 61 crore citizens cast their vote and set a new record. The people of India gave a clear mandate. The government is working for ‘Sabka Saath, Sabka Vikas.”In his speech, Kovind emphasised on the need for women empowerment, and more importantly, the safety of women.He had said, “To ensure equal rights for every sister and daughter in the country, eradication of practices like Triple Talaq and nikah halala is necessary. I would request all members to extend their support to these efforts to make the lives of our sisters and daughters more dignified and improved.”
A wounded unidentified person is evacuated following an attack by gunmen on a restaurant in Ouagadougou. Photo: ReutersSeventeen people have been killed and a dozen injured in a “terrorist attack” on a restaurant in Burkina Faso’s capital, the government said Monday.Witnesses said three gunmen arrived at a Turkish restaurant in a pickup truck on Sunday evening and opened fire on customers seated outside.The government then launched a counter-assault, with gunfire heard into the night.“A terrorist attack at Istanbul restaurant on Ouagadougou’s Kwame Nkrumah Avenue claimed 17 victims, their nationalities are yet to be confirmed,” a government statement said, adding that 12 people had been injured.Communication minister Remis Dandjinou said it was not clear how many assailants were involved.“They are confined to one part of the building they attacked. Security and elite forces are conducting an operation,” he said on television.A paramedic told AFP that one of the victims was a Turkish national.“We evacuated 11 people but one of them, a Turk, died on arriving at hospital,” the paramedic said, declining to be named.Police evacuated civilians from the area before launching the counter-assault, with the heavy exchange of fire becoming more sporadic as the operation went on.One soldier had said there were hostages on the first and second floor of the two-storey building housing the Turkish restaurant.The mayor of Ouagadougou and government ministers were at the scene, he added.Video footage posted on Twitter shows people fleeing, as shouting and gunshots are heard. Armed officers in uniform are then seen walking towards the attack site.An AFP journalist at the scene said the gunfire stopped at around 3:00 am (0300 GMT).Burkina Faso, a poor landlocked nation bordering Mali and Niger, has seen a string of attacks claimed by jihadist groups in recent years.In December 2016 a dozen soldiers were killed in an assault on their base in the north of the country. And in October that year there was an attack that killed four troops and two civilians.The worst recent attack was an assault on a hotel and cafe in central Ouagadougou in January 2016 that killed 30 people including several foreigners.Gunmen from the Al-Qaeda in the Islamic Maghreb (AQIM) group attacked the Splendid hotel and the Cappuccino restaurant opposite, both popular with Westerners, sparking a protracted standoff with security forces.AQIM named the three gunmen responsible and published photos of them, dressed in military fatigues and wielding weapons.The hotel and cafe attack came weeks after jihadists claimed an assault on a top hotel in Bamako, capital of neighbouring Mali, that killed 20 people.There have also been kidnappings—of Burkinabes as well as foreigners. An Australian and a Romanian, abducted in 2015, are still being held hostage by Islamist groups affiliated with Al-Qaeda.
Awami League general secretary Obaidul Quader. File photoAwami League general secretary Obaidul Quader on Wednesday asked the authorities concerned to refrain from spraying ineffective mosquito medicines.“Effective insecticide will arrive in Dhaka within two to four days and during this period there’s no need to spray ineffective medicine to show off,” he said after attending a cleanliness drive in city’s Mirpur Mazar road area. Dhaka, the overcrowded capital, has been at the centre of the dengue outbreak. The mosquito-borne disease has so far claimed 23 lives, according to government data but unofficial estimates suggest the death toll is much higher.Dhaka’s city corporations have been criticised for their failure to eliminate mosquitoes responsible for dengue.A municipal worker sprays insecticide to kill mosquitos in Dhaka on 5 August 2019, as Bangladeshi authorities attempted to contain a dengue fever outbreak. Photo: AFPA total of 2,348 people were infected with the mosquito-borne disease in 24 hours until Tuesday morning, according to the Directorate General of Health Services. Of them, 1,284 cases were reported from the capital. Five of them were suffering from dengue hemorrhagic while another from dengue shock syndrome.Since the beginning of this year, 29,912 dengue patients were hospitalised.Dengue cases continue to be reported from across the country and it is feared that the number of patients may increase as people travel to their village homes from Dhaka during the upcoming vacation of Eid-ul-Azha, slated to be celebrated on 12 August.
The scientists account for this “superactivation” property by explaining that quantum channels have two different kinds of capacity. “Private capacity” is the rate at which a channel can send secure classical data. “Assisted capacity” is the transmission rate in which multiple symmetric channels can assist a given channel in sending quantum data. As the physicists demonstrated, a channel’s assisted capacity is always at least half as large as its private capacity. As an example of superactivation, the scientists showed that combining a private “Horodecki” channel and a symmetric channel (each with zero capacity) can give a quantum capacity of more than 0.01 qubits per channel. It’s as if each channel has the potential to activate the other, canceling the other’s reason for having zero capacity.“The effect has something to do with the existence of something called ‘private Horodecki channels,’” Smith said. “These channels have the weird property that, even though they’re too noisy to allow quantum communication, somehow they still allow you to send classical messages that are completely private. Roughly speaking, we figured out that there’s this second kind of channel – a symmetric channel – that also can’t send any quantum messages on its own, but can be used to transform the private classical communication of the Horodecki channel into noiseless quantum communication.”Superactivation raises some interesting questions about the nature of communication. For instance, you would think that the question “can this communication link transmit any information?” would have a straightforward answer. However, with quantum data, the answer may be that it depends on the context. If identifying a quantum channel’s capacity is not as straightforward as previously thought, then new ideas will be needed for designing error-correction techniques in quantum channels.These results lead to other questions, such as what the effect of combing three channels might be. The overall complexity of quantum channel capacity will keep the researchers investigating the fundamental characteristics of communication in the physical world.“First, I’d like to understand the role of privacy in this whole thing, and whether it’s necessary to achieve a superactivation,” Smith said. “In the longer term, I’d like to see if we can turn the improved understanding of quantum error correction that comes out of this into some practical ways to reduce noise in prototypes for quantum computers.”More information: Smith, Graeme and Yard, Jon. “Quantum Communication with Zero-Capacity Channels.” Science, 26 September 2008, Vol. 321. 10.1126/science.1164382.Copyright 2008 PhysOrg.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com. (PhysOrg.com) — Physicists have discovered a strange characteristic of quantum communication channels. If two quantum channels each have a transmission capacity of zero, they may still have a nonzero capacity when used together. This effect, which has no classical counterpart, reveals a new complexity in the fundamental nature of quantum communication. Citation: In quantum channels, zero plus zero can equal non-zero (2008, October 6) retrieved 18 August 2019 from https://phys.org/news/2008-10-quantum-channels-equal-non-zero.html Explore further Physicists propose a second level of quantization for quantum Shannon theory The coauthors of the study, Graeme Smith of the IBM T.J. Watson Research Center in Yorktown Heights, New York, and Jon Yard of Los Alamos National Laboratory in Los Alamos, New Mexico, have published their research in a recent issue of Science.Smith and Yard explain that one of the most important challenges in designing communication networks of any kind is taking steps to correct for noise. By decreasing noise levels in communication channels, developers can increase channel capacity, which is defined as the number of bits (or qubits, in quantum channels) that one channel can transmit. For a channel with zero capacity, no bits are transmitted.For several decades, scientists have used a well-known formula developed by Claude Shannon in 1948 for developing error-correction techniques in classical communication channels. This formula guides the design of modern communication schemes used in cell phones, the Internet, and deep-space communication. In this classical formula, capacity is additive: when two channels are used simultaneously to transmit data, the capacities of the channels are added to obtain the total capacity.But even today, physicists don’t understand quantum communication nearly as well as the classical kind. In the current study, Smith and Yard show that some pairs of zero-capacity channels can have a positive quantum capacity when used together. As the physicists explain, that would be like two cut telephone cables being able to transmit data when used together. Their finding shows two things: that quantum capacity is not additive like classical capacity, and that the quantum capacity of a single channel does not completely specify its capability for transmitting quantum information.“To me, the strange thing is that you have these two things that you would have thought were useless – I mean, you’d usually think that a zero-capacity channel was good for nothing – and when you put them together, somehow there’s a kind of synergy and they develop a very quantifiable value,” Smith told PhysOrg.com. “This doesn’t happen when you work with classical channels, and since my intuition was based on that case, I was really surprised when it happened here.” Two quantum channels that have zero capacity when used individually (orange and yellow figures) can enable communication when used together (green figure). Image credit: Graeme Smith and Jon Yard. ©2008 Science. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
(Left) Illustration of the new Li-I solar flow battery with an aqueous electrolyte, which compared to organic solvents has advantages in terms of performance, cost, and environmental friendliness. (Right) When the solar battery is exposed to light, the voltage that it needs from an external source immediately decreases, as the device is being charged by the solar cell. Credit: Yu, et al. ©2015 American Chemical Society Semiliquid battery competitive with both Li-ion batteries and supercapacitors (Phys.org)—Last October, researchers at Ohio State demonstrated the world’s first solar battery—a solar cell and a lithium-oxygen (Li-O2) battery combined into a single device. The main attraction of the solar battery concept is that, because it can harvest, convert, and store solar energy as chemical energy all in one device, it eliminates losses that occur when transferring electrons between multiple devices. The researchers estimate that this integration can potentially reduce overall costs by about 25%. © 2015 Phys.org Journal information: Journal of the American Chemical Society The researchers explain that the key component of the solar battery design is the electrolyte because it bridges the hydrophilic aqueous Li-I battery and the hydrophobic surface of the dye-sensitized solar cell photoelectrode. The electrolyte consists of several ingredients, including lithium iodide salt (LiI), which is essential for the battery’s electrochemical reactions, along with various additives that allow the hydrophilic electrolyte to wet the hydrophobic photoelectrode surface. This surface-wetting contact between the two components is essential for efficiently transferring charge from the solar cell to the battery.Overall, tests showed that the Li-I solar battery has a theoretical capacity (35.7 Ah/L with 2M LiI) close to that of conventional Li-I batteries, and it can be photocharged to about 91% of its theoretical capacity. It also appears to have good cyclability, retaining its full capacity for at least 25 cycles. Unfortunately, it currently takes about 16.8 hours to photocharge the device with a 0.1-mL electrolyte to its full capacity, and this long charge time is one of the biggest areas in need of improvement. The researchers plan to address this problem by improving the efficiency of the aqueous-compatible photoelectrode, among other strategies.In the future, the scientists also plan to extend some of the concepts in this solar battery design to other combinations of battery chemistry and solar cell photoelectrochemistry. One possibility is developing solar batteries that use sodium instead of lithium as the anode, since sodium has been gaining appeal due to its wide abundance and inexpensive fabrication costs.”Improving the solar battery’s photocharging rate and achieving full photocharging are among our goals,” Wu said. “We hope this technology will ultimately be commercialized for applications in grid-scale stationary solar energy conversion and storage.” Explore further This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Although the solar-charged Li-O2 battery represented a novel and promising concept, it had a drawback: its electrolyte was made of organic solvents, which are non-aqueous and therefore not compatible with aqueous (water-based) redox flow batteries, limiting the device’s performance. Organic solvents also face problems with environmental impact and cost.Now in a new paper published in the Journal of the American Chemical Society, Ohio State Professor Yiying Wu and his research group have improved upon their original design by developing a solar battery that replaces the organic solvents with a more environmentally friendly and cost-effective iodine redox-based aqueous solution. The new version is an aqueous lithium-iodine (Li-I) solar flow battery, which integrates an aqueous Li-I redox flow battery with a dye-sensitized solar cell. This compatibility allows the device to operate at a higher voltage, improving its overall performance and bringing the solar battery a step closer to commercialization.”I think the greatest significance is the identification and demonstration of aqueous flow batteries as the platform for solar batteries,” Wu told Phys.org. “Flow batteries are flexible in materials selection. They are modular and scalable, and are being considered for applications in stationary storage, stand-alone power and electric vehicles. Our aqueous flow solar battery is an important step that brings this simultaneous solar energy conversion and storage concept closer to practical applications.”When exposed to sunlight during the charging process, the Li-I solar battery receives about 20% of its charging energy from the sun, meaning it uses 20% less energy from conventional energy sources compared to conventional Li-I batteries. The photoassisted charging process occurs when sunlight illuminates the dye molecules, causing them to become photoexcited and inject their electrons into the photoelectrode—the battery’s third electrode, in addition to the conventional cathode and anode. The photoexcited electrons supply a photovoltage to the battery, which reduces the charging voltage (which is supplied by external energy sources) to a value that is even lower than the discharging voltage. As the researchers explain, this feat would be thermodynamically impossible without the solar energy input. More information: Mingzhe Yu, et al. “Aqueous Lithium–Iodine Solar Flow Battery for the Simultaneous Conversion and Storage of Solar Energy.” Journal of the American Chemical Society. DOI: 10.1021/jacs.5b03626 Citation: Solar battery receives 20% of its energy from the sun (2015, July 14) retrieved 18 August 2019 from https://phys.org/news/2015-07-solar-battery-energy-sun.html