NON-AQUEOUS SECONDARY BATTERY-USE GRAPHITE COMPOSITE PARTICLE, CATHODE ACTIVE SUBSTANCE MATERIAL CONTAINING IT, CATHODE AND NON-AQUEOUS SECONDARY BATTERY

WIPO Patent Application WO/2007/000982

A1

A non-aqueous secondary battery having a sufficiently small charge/discharge irreversible capacity at an initial cycle time even if an active substance layer having a cathode active substance material on a collector is made higher in density to achieve a higher capacity. A non-aqueous secondary battery-use graphite composite particle characterized by fulfilling requirements (1) and (2); (1) DL/DS is larger than 1 and up to 2 when a volume-based median size as measured with a laser diffraction/scatted particle size distribution measuring device is DL μm, and an average circle-equivalent particle size obtained from the measured area S of particles of which the outlines do not overlap the outlines of the other particles is DS with an SEM, (2) a Raman R value, which is an intensity ratio IB/IA between a maximum peak intensity IA in the vicinity of 1580 cm-1 at Raman spectrum and a maximum peak intensity IB in the vicinity of 1360 cm-1, is at least 0.04 and up to 0.14.

MATSUMOTO HITOSHI (JP)
SATOH HIDEHARU (JP)

PCT/JP2006/312758

January 04, 2007

June 26, 2006

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MITSUBISHI CHEM CORP (JP)
TOKAI CARBON KK (JP)
MATSUMOTO HITOSHI (JP)
SATOH HIDEHARU (JP)

C01B31/04; H01M4/58; H01M4/587; H01M4/62

JP2004210634A	2004-07-29
JPH1111919A	1999-01-19
JPH10334915A	1998-12-18
JPH10330107A	1998-12-15

See also references of EP 1906472A4
None

OGURI, Shohei et al. (7-13 Nishi-Shimbashi 1-chome, Minato-k, Tokyo 03, JP)

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