CARBON MATERIAL FOR LITHIUM ION SECONDARY BATTERY, NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY

Title:

CARBON MATERIAL FOR LITHIUM ION SECONDARY BATTERY, NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY

Document Type and Number:

WIPO Patent Application WO/2011/064936

Kind Code:

A1

Abstract:

A carbon material for a lithium ion secondary battery has a positron lifetime of from 370 pico-senconds to 480 pico-seconds inclusive, where the positron lifetime is measured by a positron annihilation method under the following conditions (A) to (E). (A) positron beam source: generating positrons from electron-positron pairs by using an electron accelerator (B) gamma-ray detector: BaF2 scintillator and photoelectron multiplier (C) measurement temperature and ambient atmosphere: at 25 °C in vacuum (D) annihilation γ-ray counts: 3 × 106 or more (E) positron beam energy: 10 keV

Inventors:

SAWAYAMA YOSUKE (JP)
SAKASITA SHINPEI (JP)
SASAKI TATSURO (JP)

Application Number:

PCT/JP2010/006183

Publication Date:

June 03, 2011

Filing Date:

October 19, 2010

Export Citation:

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Assignee:

SUMITOMO BAKELITE CO (JP)
SAWAYAMA YOSUKE (JP)
SAKASITA SHINPEI (JP)
SASAKI TATSURO (JP)

International Classes:

H01M4/587; C01B31/02

Foreign References:

JP2009200014A	2009-09-03
JP2001102046A	2001-04-13
JP2006083012A	2006-03-30
JP2008010224A	2008-01-17
JP2004182507A	2004-07-02
JP2006083012A	2006-03-30
JP2004303428A	2004-10-28
JP2009267807A	2009-11-12

Other References: