Title:
SODIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO2010109889
Kind Code:
A1
Abstract:
Disclosed is a sodium ion secondary battery having excellent charge and discharge efficiencies as well as excellent charge and discharge characteristics, wherein charging and discharging can be repeated without causing problems such as deterioration in battery performance. Specifically disclosed is a sodium ion secondary battery which is provided with a positive electrode, a negative electrode having a negative electrode active material, and a nonaqueous electrolyte solution containing a nonaqueous solvent. The nonaqueous solvent is substantially composed of a saturated cyclic carbonate (excluding the use of ethylene carbonate by itself), or a mixed solvent of a saturated cyclic carbonate and a chain carbonate, and a hard carbon is used as the negative electrode active material. It is preferable that the nonaqueous solvent used for the sodium ion secondary battery is substantially composed of propylene carbonate, a mixed solvent of ethylene carbonate and diethyl carbonate, or a mixed solvent of ethylene carbonate and propylene carbonate.
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Inventors:
KOMABA SHINICHI (JP)
OZEKI TOMOAKI (JP)
MURATA WATARU (JP)
ISHIKAWA TORU (JP)
OZEKI TOMOAKI (JP)
MURATA WATARU (JP)
ISHIKAWA TORU (JP)
Application Number:
PCT/JP2010/002149
Publication Date:
September 30, 2010
Filing Date:
March 25, 2010
Export Citation:
Assignee:
UNIV TOKYO SCI EDUC FOUND (JP)
KOMABA SHINICHI (JP)
OZEKI TOMOAKI (JP)
MURATA WATARU (JP)
ISHIKAWA TORU (JP)
KOMABA SHINICHI (JP)
OZEKI TOMOAKI (JP)
MURATA WATARU (JP)
ISHIKAWA TORU (JP)
International Classes:
H01M10/054; H01M4/587; H01M10/0569
Domestic Patent References:
| WO2008059961A1 | 2008-05-22 |
Foreign References:
| JP2004533706A | 2004-11-04 | |||
| JP2007234512A | 2007-09-13 |
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki (JP)
Right wood Masayuki (JP)
Right wood Masayuki (JP)
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