Title:
NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2015/045387
Kind Code:
A1
Abstract:
The invention addresses the problem of improving battery characteristics by the optimum combination of an electrolyte and a negative electrode active material. In a non-aqueous electrolyte secondary battery, an electrolyte is used that contains a metal salt and an organic solvent having a heteroatom and satisfies the relationship Is > Io, where, for peak intensities derived from the organic solvent in a vibrational spectroscopy spectrum, Io is the intensity of a peak inherent in the organic solvent and Is is the intensity of a peak to which the peak inherent in the organic solvent shifts. As a negative electrode, any of the followings (1) to (5) is used:
(1) Graphite having a G/D ratio of 3.5 or more, said G/D ratio being the ratio of the peak of the G-band and the peak of the D-band in a raman spectrum
(2) Carbon material having a crystallite size of 20 nm or less, said crystallite size being calculated from the half width of a peak appearing at 2θ = 20° to 30° in an x-ray diffraction profile measured by an x-ray diffraction method
(3) Silicon element and/or tin element
(4) Metal oxide that can absorb and release lithium ions
(5) Graphite having a major axis to minor axis ratio (major axis/minor axis) of 1 to 5
Inventors:
YAMADA ATSUO (JP)
YAMADA YUKI (JP)
NAKAGAKI YOSHIHIRO (JP)
KAWAI TOMOYUKI (JP)
HASEGAWA YUKI (JP)
MASE KOHEI (JP)
GODA NOBUHIRO (JP)
YAMADA YUKI (JP)
NAKAGAKI YOSHIHIRO (JP)
KAWAI TOMOYUKI (JP)
HASEGAWA YUKI (JP)
MASE KOHEI (JP)
GODA NOBUHIRO (JP)
Application Number:
PCT/JP2014/004911
Publication Date:
April 02, 2015
Filing Date:
September 25, 2014
Export Citation:
Assignee:
UNIV TOKYO (JP)
International Classes:
H01M10/052; H01M4/587; H01M10/0566; H01M10/0568; H01M10/0569
Domestic Patent References:
| WO2006115023A1 | 2006-11-02 |
Foreign References:
| JPS6036315A | 1985-02-25 | |||
| JPH07320783A | 1995-12-08 | |||
| JP2001266878A | 2001-09-28 | |||
| JP2002203562A | 2002-07-19 | |||
| JPH1069922A | 1998-03-10 | |||
| JPH11154513A | 1999-06-08 | |||
| JP2001507043A | 2001-05-29 | |||
| JP2002523879A | 2002-07-30 |
Other References:
RYO YAEGASHI: "Yobai Bunshi no Haii Jotai Seigyo ni yoru Yuki Yoeki no Shinkino Hatsugen", ABSTRACTS, THE 53RD BATTERY SYMPOSIUM IN JAPAN , THE COMMITTEE OF BATTERY TECHNOLOGY, 13 November 2012 (2012-11-13), pages 507
Attorney, Agent or Firm:
KYORITSU INTERNATIONAL (JP)
Patent business corporation Joint establishment (JP)
Patent business corporation Joint establishment (JP)
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