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主题:【原创】艰难的一跃 -- 晨枫

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家园 超级电容下岗,电池上位!

http://www.nature.com/nature/journal/v458/n7235/abs/nature07853.html

http://www.nature.com/nature/journal/v458/n7235/edsumm/e090312-05.html

High-speed batteries

Batteries are thought of as having high energy density but low power rates, while for fast-discharging supercapacitors the opposite is true. Byoungwoo Kang and Gerbrand Ceder have now developed a lithium-ion battery that challenges that assumption, discharging extremely rapidly and maintaining a power density similar to a supercapacitor, two orders of magnitude higher than a normal lithium-ion battery. This is achieved by modifying LiFePO4, a material widely used in batteries. The starting point is nanosized LiFePO4, which already gives relatively fast discharge rates, which is then coated with a similar compound that is slightly Fe,P,O-deficient. On heating, the coating forms a glassy top layer that enhances lithium-ion mobility. The performance of batteries based on this technology could lead to new applications for electrochemical energy storage.

这个磷酸铁锂就是比亚迪的电动车所用的材料,这个成果一来,对电动车可是大大的利好。至于能不能用于打大弹弓,我看也不是没有不可能。采用新技术实现跨越式发展往往比跟踪成熟技术更加有前途,晨大这个观点是对的。


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