Title:
NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2024/024505
Kind Code:
A1
Abstract:
A negative electrode (12) for nonaqueous electrolyte secondary batteries according to the present invention comprises a negative electrode collector (30) and a negative electrode mixture layer (32) that is formed on the negative electrode collector (30); the negative electrode mixture layer (32) comprises a first negative electrode mixture layer (34) and a second negative electrode mixture layer (36), which are arranged on the negative electrode collector (30); the first negative electrode mixture layer (34) contains an Si-based material and graphite particles A; the second negative electrode mixture layer (36) contains an Si-based material and graphite particles B that have a lower internal void fraction than the graphite particles A; and the ratio (T1/T2) of the thickness (T1) of the first negative electrode mixture layer 34 to the thickness (T2) of the second negative electrode mixture layer (36) is not less than 1.05 but less than 1.20.
Inventors:
TAMAGAWA RYO
TASHITA TAKAMITSU
TASHITA TAKAMITSU
Application Number:
PCT/JP2023/025688
Publication Date:
February 01, 2024
Filing Date:
July 12, 2023
Export Citation:
Assignee:
PANASONIC ENERGY CO LTD (JP)
International Classes:
H01M4/134; H01M4/133; H01M4/36; H01M4/38; H01M4/587
Domestic Patent References:
| WO2019187537A1 | 2019-10-03 | |||
| WO2020175361A1 | 2020-09-03 | |||
| WO2019239652A1 | 2019-12-19 |
Foreign References:
| JP2021099939A | 2021-07-01 |
Attorney, Agent or Firm:
YKI Intellectual Property Attorneys (JP)
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