Patent ID: 9385363
Filing Date: 2016-07-05
CPC Classification: H01M,Y02E

Claim Text:
1. A producing method of a composite active material having an active material and a coat layer containing an ion conductive oxide and formed on a surface of the active material, comprising: an applied film forming step of forming an applied film by applying a coating liquid for coat layer, containing an alkoxide compound as a raw material of the ion conductive oxide, on a surface of the active material under an atmosphere of lower dew-point temperature than dew-point temperature where the active material deteriorates; a hydrolysis promoting step of promoting hydrolysis of the alkoxide compound by exposing the applied film under an atmosphere of higher dew-point temperature than dew-point temperature in the applied film forming step; and a heat-treating step of forming the coat layer by heat-treating the applied film after the hydrolysis promoting step; wherein the dew-point temperature in the hydrolysis promoting step is 0° C. or more.