Trapping sulphur particles in graphene cages produces a cathode material that could finally make lithium Panasonic Nv-gs27 Battery capable of powering electric cars
But good as they are, lithium SAMSUNG PL65 Charger batteries are not up to the demanding task of powering the next generation of electric vehicles. They just don't have enough juice or the ability to release it quickly over and over again.
The problem lies with the cathodes in these Dell XPS M1330 ac Adapter batteries. The specific capacities of the anode materials in lithium MOTOROLA V500 battery are 370 mAh/g for graphite and 4200 mAh/g for silicon. By contrast, the cathode specific capacities are 170 mAh/g for LiFePO4 and only 150mAh/g for layered oxides.
So the way forward is clear: find a way to improve the cathode's specific capacity while maintaining all the other characteristics that Fujifilm Finepix f810 Battery require, such as a decent energy efficiency and a good cycle life.
Today, Hailiang Wang and buddies at Stanford University say they've achieved a significant step towards this goal using sulphur as the cathode material of choice.
Chemists have known for many years that sulphur has potential: it has a theoretical specific capacity of 1672 mAh/g. But it also has a number of disadvantages, not least of these is the fact that sulphur is a poor conductor. On top of this, polysulphides tend to dissolve and wash away in many electrolytes while sulphur tends to swell during the discharge cycle causing it to crumble. (Sony Cyber-Shot Dsc-w110 Battery)
But Wang and co say they've largely overcome these problems using a few clever nanoengineering techniques to improve the performance. Their trick is to create submicron sulphur particles and coat them in a kind of plastic called polyethyleneglycol or PEG. This traps polysulphides and prevents them from washing away.
Next, Wang and co wrap the coated sulphur particles in a graphene cage. The interaction between carbon and sulphur renders the particles electrically conducting and also supports the particles as they swell and shrink during each charging cycle.
The result is a cathode that retains a specific capacity of more than 600 mAh/g over 100 charging cycles.
That's impressive. Such a cathode would immediately lead to rechargeable lithium Lenovo ThinkPad SL300 ac Adapter batteries with a much higher energy density than is possible today. "It is worth noting that the graphene-sulfur composite could be coupled with silicon based anode materials for rechargeable Sony Dcr-hc35 Battery with significantly higher energy density than currently possible," say Wang and co
But there is more work ahead. Even though the material maintains a high specific capacity over 100 cycles, Wang and co say the capacity drops by 15 per cent in the process.
So they will be hoping, and indeed expecting, to improve on this as they further optimise the material.
The next step then is to create a working Toshiba Equium a100-306 Battery out of this stuff. Wang and co say they plan to couple it to a pre-lithiated silicon based anode to achieve this.
If it all works out (and that's a significant 'if'). your next car could be powered by Li-S Toshiba pa2429ur Battery.
Ref:arxiv.org/abs/1107.0109: Graphene-Wrapped Sulfur Particles as a Rechargeable Lithium-Sulfur-Battery Cathode Material with High Capacity and Cycling Stability
UncleAl
278 Comments- 1 Day Ago
- 07/05/2011
Enviro-whinerism is that philosophy and dialectic condemning progress in its every form. Terminate every viable future with UNKNOWN HAZARDS! The technology cannot be applied until all unknown hazards are evaluated, extrapolated over the next 1000 years of exposure.(Panasonic Vdr-m50 Battery)
This is not snit. 01 July 2011 initiated enforcement of California's carbon monoxide detector law. Every level of a home plus attached garages must have a carbon monoxide alarm. Average 30 of 37.3 million Californians die of CO poisoning each year. The 2010 census says the average California household is 2.9 people. Each life statistically saved cost at least $8.67 million including sales tax (for the very cheapest detectors), then bumped higher by multi-level homes with garages.(Acer Aspire 1410 Battery)
Weave the Safety Net tighter, sucker. A CO detector must be replaced every seven years. It's a feature not a bug.
This is not snit. 01 July 2011 initiated enforcement of California's carbon monoxide detector law. Every level of a home plus attached garages must have a carbon monoxide alarm. Average 30 of 37.3 million Californians die of CO poisoning each year. The 2010 census says the average California household is 2.9 people. Each life statistically saved cost at least $8.67 million including sales tax (for the very cheapest detectors), then bumped higher by multi-level homes with garages.(Acer Aspire 1410 Battery)
Weave the Safety Net tighter, sucker. A CO detector must be replaced every seven years. It's a feature not a bug.
Reply
sault
73 Comments- 1 Day Ago
- 07/05/2011
Wow, not one thing in your rant was relevant to the article. I guess CO alarms are the boogeyman of the day for you then. Well, we might as well take seat belts and airbags out of cars too, right? Oh, and no need to have sprinkler systems in buildings either. You know, the cost per life saved is just TOO high, just like recalling the Ford Pinto was more expensive than the lawsuits Ford's lawyers predicted because of exploding gas tanks. That mindset borders on psychopathic.
As for the ACTUAL article, good job in explaining this breakthrough KFC. However, lithium ion Fujifilm Np-40 Battery ALREADY power electric cars that are on the market. See: Nissan Leaf et al. A few sentences in this post that state that Li Ion Compaq Business Notebook nc4000 battery cannot power electric cars need to be changed.
As for the ACTUAL article, good job in explaining this breakthrough KFC. However, lithium ion Fujifilm Np-40 Battery ALREADY power electric cars that are on the market. See: Nissan Leaf et al. A few sentences in this post that state that Li Ion Compaq Business Notebook nc4000 battery cannot power electric cars need to be changed.
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UncleAl
278 Comments- 1 Day Ago
- 07/05/2011
Nanoparticle products are subject to undefined acute and chronic toxicity tests. The "safety" requirements are embellished until the product is uncreated. At best the authors have engineering not technology, for "about 30-50% of our Li-S cells showed worse cycling performance with ~20%-25% decay per 100 cycles." If your read the article, that is for mere button cells not energy storage racks whacked around, roasted, and frozen in a car PANASONIC DVD-LV50 battery.
Airline seats are made to kill passengers not save them. Wrongful death is a cheaper settlement than perpetual care - and the weight savings vs. plane mileage pays for it and more. Airbags reduce injuries to idiots who do not wear $30 seatbelts. A late model car easily contains $3000 of airbags - two up front plus side curtain bags then electronics. You pay and pay for that: up front, with sales tax, with annual car registration based on purchase price, with annual car insurance in kind. Sell a million cars, lose $3 billion for "safety." The Pinto gas tank shield cost ~$5 installed.(Casio Exilim Ex-z30 Battery)
Learn the difference among philosophy, economics, and corruption. Look at the nationalities of the authors. America cannot manage discovery, it can only manage to end it.
Airline seats are made to kill passengers not save them. Wrongful death is a cheaper settlement than perpetual care - and the weight savings vs. plane mileage pays for it and more. Airbags reduce injuries to idiots who do not wear $30 seatbelts. A late model car easily contains $3000 of airbags - two up front plus side curtain bags then electronics. You pay and pay for that: up front, with sales tax, with annual car registration based on purchase price, with annual car insurance in kind. Sell a million cars, lose $3 billion for "safety." The Pinto gas tank shield cost ~$5 installed.(Casio Exilim Ex-z30 Battery)
Learn the difference among philosophy, economics, and corruption. Look at the nationalities of the authors. America cannot manage discovery, it can only manage to end it.
Reply
shomas
178 Comments- 1 Day Ago
- 07/05/2011
Thank you. No one wants people to die, but too few consider the cost of prevention, while too many expect government to protect us from everything including ourselves.(OLYMPUS LI-10B battery )
The insane costs of excessive regulations such as CA co detectors significantly negatively impacts the economy making people spend significant amounts or money on things other then what they actually wanted or needed. Even more expensive yet more protective would be to outlaw gas stoves, furnaces, and water heaters. Then no one wold die of co poisoning in residences but gas cost less saving people money and thereby improving lives more significantly then the associated risks.
The insane costs of excessive regulations such as CA co detectors significantly negatively impacts the economy making people spend significant amounts or money on things other then what they actually wanted or needed. Even more expensive yet more protective would be to outlaw gas stoves, furnaces, and water heaters. Then no one wold die of co poisoning in residences but gas cost less saving people money and thereby improving lives more significantly then the associated risks.
Reply(MSI Wind U100 Battery)
dd36
9 Comments- 1 Day Ago
- 07/05/2011
Yep, the USA ended the nanoparticles in my sunscreen... I mean they tested them so much that they killed innovation... I mean nobody can do anything because we have such stringent nanoparticle laws... My girlfriend spreads nanoparticles on her face every morning but they aren't allowed in anything else... uhhhhhh... nanoparticles are in my pots and bans but.... uhhhh...
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more tags: Canon Powershot sd40 Battery, Hp Photosmart r717 Battery, Olympus Az-1 Battery, Kodak Easyshare ls743 Battery, Samsung Digimax a6 Battery, Sony HDR-FX1 Charger, Panasonic Nv-gs15 Battery, Sony Dsc-f505 Battery, HP Compaq Business Notebook 6715b ac Adapter, Hp Compaq Business Notebook nx6310 battery, Canon Powershot sd40 Battery, SAMSUNG VP-M50 Battery
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