MATIÈRE ACTIVE D'ÉLECTRODE NÉGATIVE, MATIÈRE ACTIVE D'ÉLECTRODE NÉGATIVE MIXTE ET PROCÉDÉ DE PRODUCTION DE MATIÈRE ACTIVE D'ÉLECTRODE NÉGATIVE

摘要

The present invention is a negative electrode active material containing a negative electrode active material particle; the negative electrode active material particle including a silicon compound particle containing a silicon compound (SiO: 0.5 ≤ x < 1.6), wherein the silicon compound particle contains a Li compound, and the negative electrode active material particle contains at least one kind of salt selected from salts of polyacrylic acid and salts of carboxymethyl cellulose, together with a metal salt containing at least one kind of metal selected from Mg and Al. This provides a negative electrode active material that is capable of stabilizing slurry that is produced in production of a negative electrode for a secondary battery, and improving initial charge-discharge characteristics and cycle performance when it is used as a negative electrode active material for a secondary battery.