LITHIUM ION SECONDARY BATTERY, ELECTRONIC DEVICE, ELECTRIC POWER TOOL, ELECTRICAL VEHICLE, AND ELECTRIC POWER STORAGE SYSTEM

摘要

A lithium ion secondary battery includes a cathode and an anode being opposed to each other with a separator in between, and an electrolytic solution. One or more of the cathode, the anode, and the separator contain an organic silicon compound including a compound having a polysilsesquioxane skeleton.