Prime Planet Energy & Solutions, Inc.

Kiyohiko Nakano

Yutaka Oyama

Shinsuke Matsuhara

Shuhei Takeshita

Yusuke Araki

Provided is a graphite-based negative electrode active material that can impart both high output characteristics and high cycle characteristics to a nonaqueous electrolyte secondary battery. The graphite-based negative electrode active material disclosed herein is made up of particles having, in a cross-sectional view, a flat central portion made up of graphite, and a porous accumulation portion made up of accumulated graphite, on both sides of the flat central portion. The graphite that makes up the flat central portion is present more densely than the graphite that makes up the porous accumulation portion.

Growing community of inventors

Toyota, Japan

Kiyohiko Nakano