Electrode and method of fabricating it, and battery

Abstract

A battery capable of obtaining a high energy density and obtaining superior cycle characteristics is provided. A spirally wound electrode body 20 having a lamination structure composed of a cathode 21, an anode 22, and a separator 23 is contained in a battery can 11. In the cathode 21, a cathode active material layer 21B containing an ambient temperature molten salt and a cathode active material is provided on a cathode current collector 21A. The content ratio of the ambient temperature molten salt in the cathode active material layer 21B is in the range from 0.1 mass % to 5 mass %. The ambient temperature molten salt is, for example, a tertiary or quaternary ammonium salt that is composed of a tertiary or quaternary ammonium cation and an anion having a fluorine atom.

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