Title:
NONAQUEOUS LITHIUM ELECTRICITY STORAGE ELEMENT
Document Type and Number:
WIPO Patent Application WO/2024/053711
Kind Code:
A1
Abstract:
The present disclosure provides a nonaqueous lithium electricity storage element having high high-temperature cycle durability. The nonaqueous lithium electricity storage element comprises a positive electrode including a positive-electrode active material layer, a negative electrode, a separator, and a nonaqueous electrolytic solution containing lithium ions. The positive-electrode active material layer comprises a positive-electrode active material and an alkali-metal compound. The negative electrode includes a negative-electrode active material layer, the surface of which, when photographed in the state of being not exposed to the air with a scanning electron microscope at a magnification of 100 diameters, gives a secondary-electron image. Binarizing the pixels of the secondary-electron image by lightness gives an image in which a light region and a plurality of dark regions corresponding to deposits formed on the surface of the negative-electrode active material layer are present. When one pixel is taken as 1.46 μm, the areas of the individual dark regions have a maximum value S [pixel2] of 4,000 or less.
Inventors:
NAKAMURA FUMIYA (JP)
KIMURA YUIMA (JP)
NOTO KENICHI (JP)
KASAMA RYOTA (JP)
KIMURA YUIMA (JP)
NOTO KENICHI (JP)
KASAMA RYOTA (JP)
Application Number:
PCT/JP2023/032703
Publication Date:
March 14, 2024
Filing Date:
September 07, 2023
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
KOMATSU MFG CO LTD (JP)
KOMATSU MFG CO LTD (JP)
International Classes:
H01G11/26; H01G11/06; H01G11/64
Domestic Patent References:
| WO2021172175A1 | 2021-09-02 |
Foreign References:
| JP2020013881A | 2020-01-23 | |||
| US20220224141A1 | 2022-07-14 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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