リチウムイオン二次電池用負極活物質 - jx Nippon Mining & Metals Co., Ltd.

Title:

リチウムイオン二次電池用負極活物質

Document Type and Number:

Japanese Patent JP5490510

Kind Code:

B2

Abstract:

To provide a negative electrode active material having superior cycle characteristics and high charge and discharge capacity as a substitute for graphite, to provide a negative electrode using the active material, and to provide a lithium ion secondary battery.

This negative electrode active material for the lithium ion secondary battery contains CaSi2of which a crystal structure is R-3m (Z=6), and contains 50 wt% or more of the CaSi2. Furthermore, as for the negative electrode active material, it is preferable that the average particle diameter is 2-30 μm, and 10% cumulative diameter in the particle size distribution on a volumetric basis is 1-5 μm, and 90% cumulative diameter in the distribution is 5-70 μm.

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Inventors:

Seiji Tsuji
Atsushi Mizusawa
River Saki Hideki
Haydy Bisbal
Kazuo Oki
Kenji Sato

Application Number:

JP2009282958A

Publication Date:

May 14, 2014

Filing Date:

December 14, 2009

Export Citation:

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Assignee:

jx Nippon Mining & Metals Co., Ltd.

International Classes:

H01M4/38; C01B33/06

Domestic Patent References:

JP10083817A

Foreign References:

WO2008025188A1

Attorney, Agent or Firm:

Axis International Patent Business Corporation

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