METHOD FOR PRODUCING IRON OXYFLUORIDE POSITIVE ELECTRODE ACTIVE SUBSTANCE AND IRON OXYFLUORIDE POSITIVE ELECTRODE ACTIVE SUBSTANCE

摘要

Provided is a technology for producing a positive electrode active substance mainly composed of FeOF having a sufficient charge-discharge capacity, in the short-time and easy manner. Also provided is a positive electrode active substance mainly composed of FeOF. The method for producing the positive electrode active substance mainly composed of FeOF comprises the steps of admixing iron oxide Fe 2 O 3 and iron fluoride FeF 3 both in solid states, and melt-quenching the mixture in an atmosphere of inert gas. The positive electrode active substance mainly composed of FeOF is composed of not less than 50% by weight of FeOF with a remainder being iron fluoride FeF 3 and/or iron oxide Fe 2 O 3 .