主题:【求助】“锂电充电只需十秒”!谁帮着核实下这条消息。。。 -- 起于青萍之末
的原始出处和原始写法是什么样的?
http://web.mit.edu/newsoffice/2009/battery-material-0311.html
无法想象
http://www.ccthere.com/article/2073573
看摘要上说容量也就是达到超级电容的水平。
http://www.technologyreview.com/energy/22280/
The new batteries would store nearly 10 times as much energy as an ultracapacitor of the same size.
量产了而且早就有大功率充电器材。MIT的这篇文章更多的是学术性的。
可看看这链接出处
人家是引入了一层缺陷层来增强锂离子的传输。磷酸铁锂包碳一是抑制晶粒成长,一是改善晶粒的界面电阻。和这个根本不是一回事。
一条锂子专用通道。。。
要多知道一点细节就好了
另外,锂离子包碳,我理解主要还是提高铁锂的电导率
包覆的东西不能根本改变材料的本征特性,但是从宏观角度来讲确实提高了电极的导电率。
nature上说得很清楚。
"If transport of the lithium ions was so fast, something else had to be the problem," Ceder said.
Further calculations showed that lithium ions can indeed move very quickly into the material but only through tunnels accessed from the surface. If a lithium ion at the surface is directly in front of a tunnel entrance, there's no problem: it proceeds efficiently into the tunnel. But if the ion isn't directly in front, it is prevented from reaching the tunnel entrance because it cannot move to access that entrance.
似乎是在变层所谓的通道口(或者说surface to the diffusion channel)做了一个量子阱,锂离子直接从那里走,从而提高迁移率。碳包覆应该是从晶格上做文章吧。这里还有一个他们的数据。
http://www.electrochem.org/meetings/scheduler/abstracts/214/0588.pdf