NON-AQUEOUS SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a non-aqueous secondary battery having extremely high charge/discharge capacity. SOLUTION: An electrode active material capable of storing and releasing lithium ions comprises SiOx having an x-value of less than 1.00. Particularly, the SiOx (the x-value being preferably less than 2.00) is preferably subjected to hydrofluoric acid treatment. An electrode and the non-aqueous secondary battery each comprise using the electrode active material.