Title:
NEGATIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2015/146864
Kind Code:
A1
Abstract:
Provided are: a negative electrode active material for a lithium ion secondary battery with which high initial efficiency and battery capacity can be maintained and excellent cycling characteristics achieved; and a method for producing said active material. This negative electrode active material for a lithium ion secondary battery, said active material comprising an Si compound, and a carbon substance or a carbon substance and graphite, is obtained by means of: a step of mixing an Si compound, a carbon precursor, and, in accordance with requirements, a graphite powder; a step of granulation/compaction; a step of pulverizing the mixture to form composite particles; a step of firing the composite particles in an inert gas atmosphere; and a step of subjecting the pulverized and spheroidized composite powder or the fired powder to air classification.
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Inventors:
MISAKI HIDEHIKO (JP)
ABE MASANORI (JP)
TSUYOSHI TORU (JP)
KOHGO MASANORI (JP)
TAKATO SHUJI (JP)
ARAKAWA TAICHI (JP)
IWANAGA KOHEI (JP)
ABE MASANORI (JP)
TSUYOSHI TORU (JP)
KOHGO MASANORI (JP)
TAKATO SHUJI (JP)
ARAKAWA TAICHI (JP)
IWANAGA KOHEI (JP)
Application Number:
PCT/JP2015/058623
Publication Date:
October 01, 2015
Filing Date:
March 20, 2015
Export Citation:
Assignee:
TOSOH CORP (JP)
International Classes:
H01M4/38; C01B31/04; H01M4/36; H01M4/587
Domestic Patent References:
| WO2013027686A1 | 2013-02-28 | |||
| WO2014129594A1 | 2014-08-28 | |||
| WO2015041063A1 | 2015-03-26 |
Foreign References:
| JP2012124122A | 2012-06-28 | |||
| JP2008027897A | 2008-02-07 | |||
| JPH10289718A | 1998-10-27 | |||
| JP2013196842A | 2013-09-30 | |||
| JP2009181767A | 2009-08-13 | |||
| JP2015026579A | 2015-02-05 |
Other References:
See also references of EP 3131140A4
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