Honda Motor Co., Ltd.
COMPOSITE PARTICLES, METHOD FOR PRODUCING COMPOSITE PARTICLES, LITHIUM ION SECONDARY BATTERY ELECTRODE, AND LITHIUM ION SECONDARY BATTERY

Abstract:

Provided are composite particles, a method for producing composite particles, a lithium ion secondary battery electrode, and a lithium ion secondary battery, that can realize a lithium ion secondary battery having an excellent durability and having a large capacity due to a reduction in internal resistance. A lithium ion secondary battery comprises: a positive electrode provided with a positive electrode active material layer containing a positive electrode active material and a conduction auxiliary agent; a negative electrode provided with a negative electrode active material layer containing a negative electrode active material and a conduction auxiliary agent. At least one of the positive electrode active material layer and the negative electrode active material layer contains a conduction auxiliary agent-lithium ion conductive inorganic solid electrolyte composite in which at least a portion of the surface of a lithium ion conductive inorganic solid electrolyte is coated by a conduction auxiliary agent.