Title:
LITHIUM-ION SECONDARY BATTERY POSITIVE ELECTRODE MATERIAL AND METHOD FOR MANUFACTURING SAME, LITHIUM-ION SECONDARY BATTERY POSITIVE ELECTRODE, AND LITHIUM-ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2024/070137
Kind Code:
A1
Abstract:
Provided is a lithium-ion secondary battery positive electrode material comprising aggregated particles in which a plurality of primary particles of a positive electrode active material containing lithium iron phosphate and coated with a carbonaceous coating film are aggregated. The positive electrode active material has a prescribed composition containing lithium iron phosphate, and the change rate in a grid area of a b-axis–c-axis surface between before charging of the positive electrode material and after fully charged (that is, [(grid area before charging - grid area after fully charged)/(grid area before charging)] × 100) is 1.10% to 1.33%. When used as a positive electrode for the lithium-ion secondary battery, the positive electrode material exhibits excellent cycle characteristics and has high input/output characteristics.
Inventors:
YAMAYA RYUTA (JP)
MIZUNUMA SHOUHEI (JP)
OSHITARI SATORU (JP)
MIZUNUMA SHOUHEI (JP)
OSHITARI SATORU (JP)
Application Number:
PCT/JP2023/025770
Publication Date:
April 04, 2024
Filing Date:
July 12, 2023
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
H01M4/58; C01B25/45; H01M4/136; H01M4/36; H01M4/66
Foreign References:
| CN108448070A | 2018-08-24 | |||
| JP2013518372A | 2013-05-20 |
Attorney, Agent or Firm:
OHTANI PATENT OFFICE (JP)
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