03 Nov '12, 1am

New Silicon Batteries Outperform Typical Li-ion Chemistries

Many researchers have been working on strategies to make silicon more suitable for battery use. Scientists at Rice and elsewhere have created nanostructured silicon with a high surface-to-volume ratio, which allows the silicon to accommodate a larger volume expansion. Biswal, lead author Thakur and co-author Michael Wong, a professor of chemical and biomolecular engineering and of chemistry, tried the opposite approach; they etched pores into silicon wafers to give the material room to expand. By earlier this year, they had advanced to making sponge-like silicon films that showed even more promise. But even those films presented a problem for manufacturers, Thakur said. “They’re not easy to handle and would be difficult to scale up.” But by crushing the sponges into porous grains, the material gains far more surface area to soak up lithium ions. Biswal held up two vials, o...

Full article: http://cleantechnica.com/2012/11/02/new-silicon-batteries...

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