COMPOSITE CARBON PARTICLE AND LITHIUM-ION SECONDARY CELL USING SAME

Title:

COMPOSITE CARBON PARTICLE AND LITHIUM-ION SECONDARY CELL USING SAME

Document Type and Number:

WIPO Patent Application WO/2014/057690

Kind Code:

A1

Abstract:

A composite carbon particle for a negative electrode in a lithium-ion secondary cell, the composite carbon particle having: a core particle comprising a carbonaceous material obtained by heat-treating, at a temperature of 250°C or less, petroleum coke having a grindability index (HGI value) of 30 to 60 (measured according to ASTM D409); and a covering layer comprising a carbonaceous substance obtained by heat-treating an organic compound at a temperature of 1000 to 2000°C. The 50% particle diameter (D50) with an accumulation particle size distribution determined on a volume basis measured by laser diffraction is 1 to 30 μm.

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Inventors:

TAKEUCHI MASATAKA (JP)
YOKOYAMA YOSHIHITO (JP)
SOTOWA CHIAKI (JP)

Application Number:

PCT/JP2013/006100

Publication Date:

April 17, 2014

Filing Date:

October 11, 2013

Export Citation:

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Assignee:

SHOWA DENKO KK (JP)

International Classes:

H01M4/587; H01M4/36; H01M10/052; H01M10/0565; H01M10/0569

Domestic Patent References:

WO2013084506A1

2013-06-13

Foreign References:

JP2008300274A	2008-12-11
JP2005285633A	2005-10-13
JP2976299B2	1999-11-10
JP3193342B2	2001-07-30
JP2004210634A	2004-07-29

Other References: