After reading "Stanford's nanowire battery holds 10 times the charge of existing ones", I wrote the following comment of one of the tech news website.

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Hi everyone, i am from Hong Kong.
Hong Kong is famous for danger level of air polution.
Everyday, on the news is like this: "Tomorrow polution index is HIGH to VERY HIGH. People are recommended to stay indoor."

Believe it or not... it is the daily life of HK people...

HK urgently needed to replace all cars with EVs. And, 100 miles per a charge is more than enough for HK, because it means you can drive around the whole city many many times.

But why HK people are still not using EVs? the answer is cost of the battery. A pack of battery cost $40K to 100K HK$, and you need to replace the battery every 3 - 5 years. That is simplely not cost effective when comparing with the cost of gas you may consume in the same duration (a lot of car owners told me the same answer when i ask them why don't they change to EVs in HK).

What dose this new technology mean to HK car owners? For the same capicity of battery, the size of battery will be decrease to 1/10.... which also means Li-ion material inside the battery decease to 1/10.... the result is the cost of replacing the battery is a lot cheaper.

If replacing the battery every 3 - 5 years is still much cheaper than the gas one would consume during the same period, everyone will change to EV. Wish that day come soon.

 

http://www.dailytech.com/Stanford+Researchers+Build+Lithiumion+Battery+Using+Silicon/article10088.htm

http://news-service.stanford.edu/news/2008/january9/nanowire-010908.html