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New battery lasts 10 times as long

Original post made on Mar 13, 2008

Imagine rarely having to recharge the battery of your new, all-electric car. Saving gas is just one potential benefit of a new battery that lasts 10 times longer than standard models, creator and Stanford University researcher Yi Cui said.

Read the full story here Web Link posted Wednesday, January 2, 2008, 12:00 AM

Comments (4)

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Posted by Ken Edwards
a resident of another community
on Mar 13, 2008 at 6:53 am

Regarding the coal/NG pollution needed to generate the electricity for charging electric vehicles, take a look at the "well-to-wheel" efficiency data at the link below:
Web Link
You should also take into account the emissions from power generation in California. See the chart at: Web Link
Of course if you install solar panels and generate your own power for recharging you'll get what we're all lookiing for -- zero emissions from generation to use. In Connecticut, where I live, we also generate power using nuclear plants.


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Posted by Another Engineer
a resident of Duveneck/St. Francis
on Mar 13, 2008 at 11:00 pm

Hello Mr Edwards

Thanks for the links. This concisely-presented well to wheel analysis is exactly the right tool for evaluating propulsion options, and the metric, km/MJ, is appropriate.

However, the authors do not show how they developed the MJ numbers or what energy items comprise them. This is important, since the bookkeeping would be significantly different between an all-electric powerplant and fuel-based or hybrid propulsion. These are smart people, but engineers always want to look under the hood themselves.

In any case, the authors are spot on in promoting all-solar charging.

As for the second link: It certainly shows California is ahead of the nation with its generating choices, but the grid we plug into is national. As all freshman electrical engineers learn, it is impossible to apportion the energy delivered to a given load in a network to the various sources in the network, with so many watts coming from this generator, such and such watts from that one, and so on. Power is not linear. I suspect that you and I probably toast our bagels with a power mix closely reflecting the national blend, but we'll never know for sure.


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Posted by another engineer
a resident of Another Palo Alto neighborhood
on Mar 16, 2008 at 1:10 am

There are several troubling comments in this article.

"The battery generates 10 times the energy-------." Batteries don't generate any energy. They store energy. Why would he imply that they generate energy? Maybe to fool uneducated investors??

They can generate energy because the silicon dosen't break down?? A strange way to put it.

No matter how you put it the energy source for 10's of millions of cars will probably be coal as Nuclear is for all practical purposes banned in the U.S..

5 years to develop the technology and probably another 10 years to bring the price down below $20,000 for batteries for cars.


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Posted by Another Engineer
a resident of Duveneck/St. Francis
on Mar 17, 2008 at 11:14 am

"The battery generates 10 times the energy-------." Batteries don't generate any energy. They store energy. Why would he imply that they generate energy? Maybe to fool uneducated investors?? - another engineer

I'd chalk these misstatements up to a non-techie reporter and not a deliberate attempt to mislead.


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