Title:
LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2021/038922
Kind Code:
A1
Abstract:
The present invention provides a lithium ion secondary battery which has a configuration comprising a positive electrode plate that is composed of a lithium composite oxide sintered material plate and a negative electrode plate that is composed of a titanium-containing sintered material plate, and which still has both improved capacity and improved cycle characteristics. This lithium ion secondary battery is provided with a positive electrode plate that is composed of a lithium composite oxide sintered material plate, a negative electrode plate that is composed of a titanium-containing sintered material plate, a separator, a positive electrode collector, a negative electrode collector and an electrolyte solution; at least a part of the positive electrode collector-side surface of the positive electrode plate is bonded to the positive electrode collector, with a positive electrode-side electroconductive bonding layer being interposed therebetween; at least a part of the negative electrode collector-side surface of the negative electrode plate is bonded to the negative electrode collector, with a negative electrode-side electroconductive bonding layer being interposed therebetween; and the bonded area Sp, where the positive electrode collector and the positive electrode plate are bonded to each other with the positive electrode-side electroconductive bonding layer being interposed therebetween, and the bonded area Sn, where the negative electrode collector and the negative electrode plate are bonded to each other with the negative electrode-side electroconductive bonding layer being interposed therebetween, satisfy the relational expression 1.0 ≤ Sn/Sp ≤ 5.0.
Inventors:
MIZUKAMI SHUNSUKE (JP)
FUJITA YUUKI (JP)
KONDOU KOUICHI (JP)
MITSUHASHI TAKUAKI (JP)
FUJITA YUUKI (JP)
KONDOU KOUICHI (JP)
MITSUHASHI TAKUAKI (JP)
Application Number:
PCT/JP2020/007526
Publication Date:
March 04, 2021
Filing Date:
February 25, 2020
Export Citation:
Assignee:
NGK INSULATORS LTD (JP)
International Classes:
H01M4/131; H01M10/052; H01M10/0566; H01M10/0585
Domestic Patent References:
| WO2018123479A1 | 2018-07-05 |
Foreign References:
| JP2010212161A | 2010-09-24 | |||
| JP2018206541A | 2018-12-27 |
Attorney, Agent or Firm:
TAKAMURA Masaharu et al. (JP)
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