Title:
POSITIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2015/079546
Kind Code:
A1
Abstract:
The present invention pertains to a positive electrode for a lithium ion secondary battery and to a lithium ion secondary battery containing the same, the present invention addressing the problem of providing a lithium ion secondary battery having high energy density and high output. The above-mentioned problem can be resolved in a positive electrode for a lithium ion secondary battery provided with a positive electrode binder layer containing a positive electrode material and a current collector having the positive electrode binder layer formed on the surface thereof by adopting a configuration in which the positive electrode material contains a first positive electrode active material made of a specific laminar solid solution and a specific second positive electrode active material that reacts at the potential at the end period of electric discharging of the layer solid solution, the positive electrode binder layer in a region in contact with the current collector having a greater proportion of the second positive electrode active material than the first positive electrode active material, and the surface of the positive electrode binder layer opposite to the surface in contact with the current collector having a greater proportion of the first positive electrode active material than the second positive electrode active material.
Inventors:
KONISHI HIROAKI (JP)
KOBAYASHI MITSURU (JP)
YUASA TOYOTAKA (JP)
TOKORO HISATO (JP)
TAKANO SHUICHI (JP)
NAKABAYASHI TAKASHI (JP)
GUNJI AKIRA (JP)
TOYAMA TATSUYA (JP)
FENG XIAOLIANG (JP)
FURUTSUKI SHO (JP)
KOBAYASHI MITSURU (JP)
YUASA TOYOTAKA (JP)
TOKORO HISATO (JP)
TAKANO SHUICHI (JP)
NAKABAYASHI TAKASHI (JP)
GUNJI AKIRA (JP)
TOYAMA TATSUYA (JP)
FENG XIAOLIANG (JP)
FURUTSUKI SHO (JP)
Application Number:
PCT/JP2013/082119
Publication Date:
June 04, 2015
Filing Date:
November 29, 2013
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H01M4/525; H01M4/131; H01M4/1391; H01M4/36; H01M4/505; H01M4/58; H01M10/052
Domestic Patent References:
| WO2008081839A1 | 2008-07-10 |
Foreign References:
| JP2009525568A | 2009-07-09 | |||
| JP2012151084A | 2012-08-09 | |||
| JP2007250499A | 2007-09-27 | |||
| JP2009252497A | 2009-10-29 | |||
| JP2009252498A | 2009-10-29 |
Attorney, Agent or Firm:
INOUE Manabu et al. (JP)
Manabu Inoue (JP)
Manabu Inoue (JP)
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