摘要 |
PROBLEM TO BE SOLVED: To ensure safety of a battery by surely cutting off charging current even if battery temperature is sharply increase by reaching an overcharging state. SOLUTION: A positive electrode 10 has two layer structure of a first layer of a conductive layer 12 formed on a positive current collector 11 and a second layer of an active material layer 13 formed on the first layer. The conductive layer 12 of the first layer has a conductive filler and a binder having ether linkage, and the active material layer 13 of the second layer has at least a positive active material, a conductor, and a binder. |