Graphene, that microscopic chicken wire made of carbon atoms, has a
great many theoretical
uses. Among these is to improve
Lithium-ion battery technologies, and the big brains at the Lawrence Berkeley National Laboratory have created a graphene and tin composite material for use in
battery electrodes. When it's baked at 572 degrees Fahrenheit (300 degrees Celsius) the tin turns into nanopillars that widen the gap between the graphene layers. The greater volume of tin provided by these tiny towers improves electrode performance (read: faster charging), and the flexibility of the graphene prevents electrode degradation. Naturally, current prototypes can only maintain capacity over 30 charge cycles -- as opposed to the hundreds required for commercial applications -- so some serious improvement has to happen before we see it strut its stuff in any phones or EVs. This leaves us, once again, extolling the virtues of graphene, but lamenting its exclusively academic application.
Continue reading Researchers use graphene and tin sandwich to make better battery electrodes
Researchers use graphene and tin sandwich to make better battery electrodes originally appeared on Engadget on Wed, 03 Aug 2011 13:20:00 EDT. Please see our terms for use of feeds.
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