ALL SOLID STATE BATTERY AND METHOD FOR PRODUCING SAME

摘要

An all solid state battery can inhibit interface resistance between a cathode active material and a solid electrolyte material from increasing with time. The battery includes a cathode active material layer, an anode active material layer, and a solid electrolyte layer formed therebetween. The cathode active material layer and/or the solid electrolyte layer contains a sulfide solid electrolyte material, a reaction inhibition portion having two layers of a lithium ion layer having a first lithium ion conductor on an active material side and a stabilization layer having a second lithium ion conductor on a solid electrolyte side is formed on the cathode active material layer. The first lithium ion conductor is a compound with a lithium ion conductivity of 1×10−7 S/cm or more at normal temperature, and the second lithium ion conductor is a compound with a polyanion structure having B, Si, P, Ti, Zr, Al and/or W.

主权项

1. An all solid state battery comprising a cathode active material layer containing a cathode active material, an anode active material layer containing an anode active material, and a solid electrolyte layer formed between the cathode active material layer and the anode active material layer,
wherein at least one of the cathode active material layer and the solid electrolyte layer contains a sulfide solid electrolyte material, a reaction control portion having two layers of a lithium ion conductive layer having a first lithium ion conductor on an active material side and a stabilization layer having a second lithium ion conductor on a solid electrolyte layer side is formed on a surface of the cathode active material, the first lithium ion conductor is an Li-containing compound with a lithium ion conductivity of 1.0×10−7 S/cm or more at normal temperature, and the second lithium ion conductor is an Li-containing compound provided with a polyanion structural portion having at least one of B, Si, P, Ti, Zr, Al and W.