Title:
リチウム二次電池用負極
Document Type and Number:
Japanese Patent JP6487140
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a negative electrode for lithium ion secondary battery capable of maintaining a high discharge capacity even after repetition of charge and discharge, when a silicon-based active material is used.SOLUTION: A negative electrode for lithium ion secondary battery including an active material layer composed of a particulate active material and a binder has following characteristics 1)-3). 1) Discharge capacity of first cycle is 1000 mAh or more per 1 g of negative electrode, when performing charge and discharge with a current density of active material layer of 50 mA/g. 2) Coulomb efficiency of the first cycle is 80% or more. 3) The ratio of fifth cycle discharge capacity to the first cycle discharge capacity is 90% or more.
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Inventors:
Jin Yatsushiro
Masahiro Hosoda
Shigeta Akira
Muneki Yamada
Hisashi Eguchi
Yoshiaki Echigo
Masahiro Hosoda
Shigeta Akira
Muneki Yamada
Hisashi Eguchi
Yoshiaki Echigo
Application Number:
JP2013186309A
Publication Date:
March 20, 2019
Filing Date:
September 09, 2013
Export Citation:
Assignee:
Iwate University
UNITIKA LTD.
UNITIKA LTD.
International Classes:
H01M4/134; H01M4/62; H01M4/66
Domestic Patent References:
| JP2004288520A | ||||
| JP2004200011A | ||||
| JP2008235083A | ||||
| JP2009259723A | ||||
| JP2011238525A | ||||
| JP2013134863A | ||||
| JP2004214046A | ||||
| JP2005317309A | ||||
| JP2008103148A | ||||
| JP2013171793A |
Foreign References:
| WO2013121624A1 | ||||
| US20100062338 |