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An ultrafast rechargeable aluminium-ion battery [Copy link] 中文

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Post time 2015-4-8 21:12:58 |Display all floors
Meng-Chang Lin,        Ming Gong,        Bingan Lu,        Yingpeng Wu,        Di-Yan Wang,        Mingyun Guan, Michael Angell,        Changxin Chen,        Jiang Yang,        Bing-Joe Hwang        & Hongjie Dai
In a breakthrough, Professor of chemistry Hongjie Dai said that his team at Stanford University has invented the first high-performance aluminium battery that is fast-charging, long-lasting and inexpensive. It is also flexible too so can be used in new folding devices in development.

Stanford graduate student Ming Gong added: "The electrolyte is basically a salt that's liquid at room temperature, so it's very safe. Lithium-ion batteries can be a fire hazard".

Professor of Hongjie Dai said tat unlike other prototypes, the aluminium battery can withstand more than 7,500 cycles without any loss of capacity.
By comparison, a typical lithium-ion battery lasts about 1,000 cycles.
With a charging times of around one minute with a current density of ~4,000 mA g–1 (equivalent to ~3,000 W kg–1).

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Post time 2015-4-18 22:01:06 |Display all floors
Renewables Come of Age
- free electricity

Elon Musk's Gigafactory is already obsolete. The new aluminium batteries when they come onto the market have higher capacity, are cheaper, less polluting, charge more quickly, have a longer lifespan and are far safer. Musk's super-chargers already offer free electricity but the costs are so low that in the future all charging stations will be free.

Even then, Li-ion battery prices are plummeting almost as fast as solar panel prices.

But Musk is right that they will soon be installed in homes as well as cars. Consumers will kiss goodbye to utility companies for petrol, gas and electricity. Even on-grid electricity means super-cheap motoring. Electric motors are the engines drivers should have had a century ago, clean, quiet, HUGE torque that's flat right across the rev-range, a single gear and maintenance free. Anyone who buys a carbon driven car is buying into obsolescence.

The shift occurred in 2013, when the world added 143 gigawatts of renewable electricity capacity, compared with 141 gigawatts in new plants that burn fossil fuels, according to an analysis presented Tuesday at the Bloomberg New Energy Finance annual summit in New York.
. . .
The price of wind and solar power continues to plummet, and is now on par or cheaper than grid electricity in many areas of the world.

- Fossil Fuels Just Lost the Race Against Renewables

Russia and the Great Satan will be severely affected. No more petrodollar.

Perhaps that's why Shell is now selling lots of retail outlets and Schlumberger is cutting 11,000 jobs. Perhaps that also why Toyota is trying to push hydrogen fuel cells rather than batteries.
Compounding is the magic ingredient.

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Post time 2015-4-21 22:41:14 |Display all floors

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Post time 2015-4-24 19:10:14 |Display all floors
p.s. don't use Musk's super charger if you want a long battery life.
Compounding is the magic ingredient.

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Post time 2015-5-8 21:05:23 |Display all floors
Musk Has The Wrong Technology

The BYD E6 uses LiFePO batteries which have a number of advantages over Musk's technology including:

1) better safety if damaged (one accident with an E6 resulted in a fire but that was caused by arcing of the battery rather than through battery damage per se, whereas some airline companies refuse to ship large batches of Li-ion batteries as used in Teslas,
2) quicker charge times (50% fast charge in 10mins, compared to Musk's 20mins),
3) better voltage stability, meaning a longer cycle (though this would make it harder to detect when your battery was about to run flat),
4) longer shelf life (Musk's battery will deteriorate faster over the years resulting in reduced range),
5) high discharge rate (faster accelerating car),
6) better environment impact without cobalt electrodes, and with all battery components recycleable, and
7) no thermal runaway.

The biggest downside of LiFePO is energy density; about 14% lower than Musk's Li-ion. LiFePO became commercially viable when Yet-Ming Chiang et al. at MIT solved the low conductivity problem.

The E6 is already at Musk's target price for his affordable Model 3 Tesla car which is dependent on the Gigafactory bringing costs down: $35,000 and sales started in 2011. Now used in China, Columbia, Costa Rica, The Netherlands, UK, US and Taiwan.

There's a HUGE demand for Musk's 7kWh Powerpack home battery with 38,000 reserve orders. But his own Solar City has hit problems with feed-in tariff legislation such that they it's not economically viable and only offer the larger 10kWh Powerpack battery which is only for power failure backup. This only has a peak power of about 2kW!!! Perhaps that's why Musk has invested in the Gigafactory; to bring costs down such that it becomes the VHS of the battery market, krappier than Video2000 or betamax but market monopoliser.

Incidentally, solar is MUCH CHEAPER than the subsidised fossil fuels: According Deutsche Bank’s recent bullish report on solar power, unsubsidized rooftop solar power costs $0.08 – $0.13 per kilowatthour (kWh) globally, which can be as much as 40 percent below retail electricity prices.
- Solar energy enjoys a glowing outlook.

Notable exceptions include the gangster-run states, Amerika and Poodleville where solar is, only just, more expensive. But Poodleville is notorious for a report claiming that wave power was too expensive only to admit now, decades later, that the report over-estimated wave power costs by a factor of ten!!! Most other non-thieved states show a HUGELY lower solar price.
Compounding is the magic ingredient.

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Post time 2015-5-8 22:29:21 |Display all floors
Notable exceptions include the gangster-run states, Amerika and Poodleville where solar is, only just, more expensive.


And if you look at the graph, they're also the two highest solar and fossil prices too, much higher than other nations, followed by the gangster-run, thieved state of Kanada which ALSO has solar more expensive than subsidised fossil. Yet again, corruption in the anglo-thieved states stinks to high heaven.
Compounding is the magic ingredient.

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Post time 2015-5-8 22:29:48 |Display all floors
Notable exceptions include the gangster-run states, Amerika and Poodleville where solar is, only just, more expensive.


And if you look at the graph, they're also the two highest solar and fossil prices too, much higher than other nations, followed by the gangster-run, thieved state of Kanada which ALSO has solar more expensive than subsidised fossil. Yet again, corruption in the anglo-thieved states stinks to high heaven.
Compounding is the magic ingredient.

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