POLYSILSESQUIOXANE-COATED SILICON NANOPARTICLES OR SINTERED PRODUCT THEREOF, PRODUCTION METHOD THEREFOR, NEGATIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM-ION BATTERY, NEGATIVE ELECTRODE FOR LITHIUM-ION BATTERY, AND LITHIUM-ION BATTERY

摘要

Polysilsesquioxane-coated silicon nanoparticles, or a sintered product thereof, comprising silicon nanoparticles, which have a volume-based average particle size of 10-500 nm, exclusive, and do not include particles having a particle size of 1000 nm or larger, and polysilsesquioxane, which coats the silicon nanoparticles and is chemically bonded to the surfaces of the silicon nanoparticles, said polysilsesquioxane-coated silicon nanoparticles or a sintered product thereof having Si-H bonds. When observed using a transmission electron microscope (TEM), the thickness of the polysilsesquioxane is 1-30 nm, inclusive.