Santoku Corporation

Masatoshi Kusatsu

Tadatoshi Murota

Tsuyoshi Ota

Yoshikatsu Seino

Masakatsu Kimura

Hiroyuki Usui

Hiroki Sakaguchi

Provided are an anode active material for lithium ion rechargeable batteries and an anode, which are capable, when used in a lithium ion rechargeable battery, of providing excellent charge/discharge capacity and cycle characteristics, and also high rate performance, as well as a lithium ion rechargeable battery using the same. The anode active material contains particles having a crystal phase represented by RAx, wherein R is at least one element selected from the group consisting of rare earth elements including Sc and Y but excluding La, A is Si and/or Ge, and x satisfies 1.0&#x2264;x&#x2264;2.0, and a crystal phase consisting of A. The material is thus useful as an anode material for lithium ion rechargeable batteries.

Negative electrode for lithium-ion secondary battery

All-solid-state lithium ion battery and positive electrode mixture

Growing community of inventors

Kobe, Japan

Masatoshi Kusatsu