Negative electrode active material particle, negative electrode comprising negative electrode active material particle, and secondary battery comprising the negative electrode

Abstract

A negative electrode active material particle, a negative electrode comprising the same, and a secondary battery comprising the negative electrode are provided. The negative electrode active material particle comprises a core and a coating layer on the core, the core comprising a silicon-based particle, and the coating layer comprising a polymer comprising an aromatic cyclic monomer unit including a heteroatom and having an alkyl group at a side chain, and thereby prevents side reactions such as the production of hydrogen gas during aqueous mixing of a slurry without increase of resistance.

Dependencies are inferred from the claim text.