INORGANIC OXIDE POWDER, INORGANIC OXIDE-CONTAINING SLURRY, LITHIUM ION SECONDARY BATTERY USING SAID SLURRY, AND PRODUCTION METHOD THEREFOR

摘要

An object of the present invention is to provide an inorganic oxide powder suitable for forming an inorganic oxide porous membrane, which is superior in lithium ion conductivity and has insulation performance, on at least one surface of a positive electrode, a negative electrode and a separator which constitute a lithium ion secondary battery. The present invention relates to an inorganic oxide powder for use in forming an inorganic oxide porous membrane having insulation performance on at least one surface of a positive electrode, a negative electrode and a separator which constitute a lithium ion secondary battery, wherein the powder has
1) an oxide purity of 90% by weight or higher,
2) an average particle diameter of 1 µm or less, and
3) an average three-dimensional particle unevenness of 3.0 or higher.