Porous silicon particles and complex porous silicon particles, and method for producing both
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United States of America Patent
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Mar 17, 2015
Grant Date -
Aug 1, 2013
app pub date -
Mar 12, 2013
filing date -
Sep 17, 2010
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Abstract
Porous silicon particles and complex porous silicon particles suitable for negative electrode materials etc. for lithium-ion batteries, which achieve high capacity and good cycling characteristics, are provided. Porous silicon particles formed by the joining of a plurality of silicon microparticles, and having an average particle diameter of 0.1 μm to 1000 μm, a three-dimensional network structure having continuous gaps, an average porosity of 15 to 93%, and a structure in which the particles of a whole particle are uniform. Complex porous silicon particles formed by the joining of a plurality of silicon microparticles and a plurality of silicon compound particles, and characterized by containing a compound of silicon and composite elements, having an average particle diameter of 0.1 μm to 1000 μm, and having a three-dimensional network structure having continuous gaps.
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