A new type of lithium-ion battery with a single crystal electrode can withstand over 20,000 charge-discharge cycles before hitting the 80 percent capacity cutoff.
Researchers at Dalhousie University studied the battery using an ultrabright synchrotron after it underwent continuous testing for six years. If it were fitted onto an electric vehicle (EV), this would roughly translate to a distance traveled of nearly five million miles (eight million km).
Funded by Tesla Canada and the Natural Sciences and Engineering Research Council (NSERC), researchers at Dalhousie University studied two types of lithium-ion batteries, one with a regular electrode and the other with a single crystal electrode under the ultrabright synchrotron light at CLS.
“The great thing about doing this kind of measurement at a synchrotron is we can actually look at this at a microscopic level without having to take the cell apart,” said Toby Bond, senior scientist at CLS, in a press release.
Inside a regular battery, lithium forces atoms of the electrode material to expand and contract, leading to microscopic cracking. “Eventually, there were so many cracks that the electrode was essentially pulverized,” added Bond.
However, the battery with a single crystal electrode showed no such signs. Instead, the researchers could not distinguish between a new cell and a six-year-old one.
https://interestingengineering.com/ener ... lion-miles
https://www.yahoo.com/news/5-million-mi ... 19061.html
5百万英里电池要来了
版主： lexian
#11 Re: 5百万英里电池要来了
#15 Re: 5百万英里电池要来了
这个就是针对锂电池的研究。而且商业化很容易，cost也只是增加了2-3%。
这里有那个教授的访谈，里面有很多细节。感兴趣的同学可以自己看看
https://nickelinstitute.org/en/blog/202 ... jeff-dahn/
这里有那个教授的访谈，里面有很多细节。感兴趣的同学可以自己看看
https://nickelinstitute.org/en/blog/202 ... jeff-dahn/
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#16 Re: 5百万英里电池要来了
这个研究其实就是发现用nmc单晶材料做正极的时候，锂电池的充放电次数可以大大增加，从2000次增长到10000次以上。
原来电池寿命是20万迈左右，现在可以增长到1百万迈以上了。
原来电池寿命是20万迈左右，现在可以增长到1百万迈以上了。
x1