Title:
NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERIES, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES USING SAME, LITHIUM ION SECONDARY BATTERY AND BATTERY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2015/052809
Kind Code:
A1
Abstract:
Provided is a novel negative electrode material for lithium ion secondary batteries, which has high lithium ion conductivity and is capable of improving the cycle characteristics of a lithium ion secondary battery. A negative electrode material for lithium ion secondary batteries according to the present invention is characterized by containing a negative electrode active material that contains silicon and/or a silicon compound and a polymer that is represented by chemical formula (1). (In chemical formula (1), A represents a functional group having an amide group (-CONH-) and a sulfo group (-SO3X (wherein X represents an alkali metal atom or a hydrogen atom (H)); B represents a functional group having a polar functional group; each of R1-R6 represents a hydrocarbon group having 1-10 carbon atoms or a hydrogen atom (H); and x and y represent composition ratios of the copolymer and satisfy 0 < x/(x + y) ≤ 1.)
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Inventors:
IWAYASU NORIO (JP)
Application Number:
PCT/JP2013/077569
Publication Date:
April 16, 2015
Filing Date:
October 10, 2013
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H01M4/48; H01M4/36; H01M4/38; H01M10/052; H01M10/0566
Domestic Patent References:
| WO2012165422A1 | 2012-12-06 | |||
| WO2012111564A1 | 2012-08-23 | |||
| WO2007072948A1 | 2007-06-28 | |||
| WO2011024789A1 | 2011-03-03 | |||
| WO2007088979A1 | 2007-08-09 |
Foreign References:
| JP2013012357A | 2013-01-17 | |||
| JP2013191485A | 2013-09-26 | |||
| JP2013197069A | 2013-09-30 | |||
| JP2012074167A | 2012-04-12 |
Attorney, Agent or Firm:
POLAIRE I. P. C. (JP)
Polaire Intellectual Property Corporation (JP)
Polaire Intellectual Property Corporation (JP)
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