Electrode including barrier layer containing two conductive powders with different particle diameters and method for producing the same

摘要

Disclosed is an electrode (30) (for example, a positive electrode for a lithium ion battery), wherein an active material layer (35) mainly composed of an electrode active material is supported by a metal collector (32). A barrier layer (33) containing a conductive material (330) and a water-insoluble polymer material (334) are formed on the surface of the metal collector (32). The conductive material (330) contains at least a first conductive powder (331) having a certain average particle diameter, and a second conductive powder (332) having an average particle diameter larger than that of the first conductive powder. The ratio of the first conductive powder (331) contained in the barrier layer (33) is higher than that of the second conductive powder (332).