Hitachi Metals, Ltd.

Tottori University

Santoku Corporation

Hiroki Sakaguchi

Hiroyuki Usui

Tadatoshi Murota

Ken Asada

Setsuo Andoh

Masatoshi Kusatsu

Ryouji Inoue

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

This secondary battery negative electrode material constitutes an active material layer formed on a current collector layer of a secondary battery negative electrode and includes a Si particle and a coating material containing Ni and P, formed to cover a surface of the Si particle.

Secondary battery negative electrode material, secondary battery negative electrode, method for manufacturing secondary battery negative electrode material, and method for manufacturing secondary battery negative electrode

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Tottori, Japan

Hiroki Sakaguchi