Expensive batteries are holding back electric cars Can that change?

28 Апр 2014 | Author: | Комментарии к записи Expensive batteries are holding back electric cars Can that change? отключены
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Expensive batteries are holding electric cars. Can that

One of the big reasons why electric cars been slow to catch on is batteries are still hugely usually around $12,000 to or one-third the price of the vehicle — and can only limited range.

So, these batteries ever get That’s the big question. Some are deeply skeptical that will be quick or easy. In the issue of the Proceedings of the National of Science . Fred Schlacter has an on why batteries are fundamentally different things like mobile or computers:

The public has become accustomed to progress in mobile phone computers.  These developments are due in to the ongoing exponential increase in processing power, doubling every 2 years for the past decades. This pattern is called Moore’s Law and is named for Moore, a cofounder of Intel.

Now the bad news. There is no Moore’s Law for Schlacter says:

The reason is a Moore’s Law for computer processors is electrons are small and they do not up space on a chip. Chip is limited by the lithography technology to fabricate the chips; as lithography ever smaller features can be on processors.

Batteries are not like this. which transfer charge in are large, and they take up as do anodes, cathodes, and electrolytes. A battery stores more than an AA-cell.

Potentials in a are dictated by the relevant chemical thus limiting eventual performance. Significant improvement in capacity can only be made by to a different chemistry.

Scientists and experts, who have been in the recent past about lithium-ion batteries and about new battery chemistries—lithium/air and lithium/sulfur are the candidates—are considerably less now.

So that’s the pessimistic case. will continue to be a serious for electric vehicles unless we get new breakthroughs in battery chemistry.

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But is being too gloomy? On Twitter, Naam pointed me to a 2009  finding that lithium-ion have made some strides in the past two decades, energy density rising and falling.* (That said, the of improvement appears to be slowing the end):

Meanwhile, the truly analysts will argue even incremental tweaks can dramatic results. So perhaps no need for Moore’s Law-style A 2012 analysis from Co. for instance, predicted that the for lithium-ion batteries could by as much as two-thirds by 2020, to around $200 per kilowatt-hour.

All that’s needed, the McKinsey argued, is slow, steady As new factories come online to more and more batteries, of scale will drive the price. So will a reduction in the of components, as well as smaller advances in cathodes and electrolytes increase the capacity of batteries.

And if prices do fall below the mark, as the McKinsey researchers to happen within the next then suddenly electric make a lot more financial even with gas prices at current levels. The economics drastically:

This chart sums up the situation: The overall cost of will go a long way to determining how electric vehicles gain in But the much, much harder is whether big, long-shot breakthroughs are the only thing will get us there, or whether steps might do the trick.

*  It’s worth clarifying that commenter perkinisms — the rate of improvement in battery energy density to be largely linear, while the improvement in processing power has been Batteries aren’t improving as fast.

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