| abstract |
An inorganic oxide powder suitable for forming an inorganic oxide porous film having excellent lithium ion conductivity and insulation on at least one surface of a positive electrode, a negative electrode or a separator constituting a lithium ion secondary battery I will provide a. [Solution] The present invention is an inorganic oxide powder used for forming an inorganic oxide porous film having insulation on at least one surface of a positive electrode, a negative electrode or a separator constituting a lithium ion secondary battery, 1) Oxide purity is 90% by weight or more, 2) The average particle size is 1 μm or less, And, 3) It relates to an inorganic oxide powder having an average three-dimensional particle irregularity of 3.0 or more. [Selection] Figure 1 |