Lithium iron phosphate cathode material, preparation method therefor, and lithium-ion battery
AssigneeGuangdong Brunp Recycling Technology Co., Ltd.
InventorsWeiyan HUANG, Tao WANG, Haijun YU, Changdong LI
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Abstract
A lithium iron phosphate cathode material includes primary particles and secondary particles formed by agglomeration of the primary particles. The lithium iron phosphate cathode material satisfies FSSS D BET = 5 - 40 and ρ%=50%-90%. The lithium iron phosphate cathode material exhibits good dispersibility, low agglomeration degree, and high compacted density, and a cathode sheet prepared therefrom demonstrates uniform areal density and high peel strength, so that a battery prepared from the cathode sheet has high specific capacity and superior cycling stability.
Claims11
A lithium iron phosphate cathode material, comprising primary particles and secondary particles formed by agglomeration of the primary particles, wherein the lithium iron phosphate cathode material satisfies
- FSSS
- D
- BET
- =
- 5
- -
- 40
- and ρ%=50%-90%, where FSSS refers to a Fisher sub-sieve size of the lithium iron phosphate cathode material, in a unit of μm, DBET refers to a specific surface area particle size of the lithium iron phosphate cathode material, in a unit of μm;
- and the ρ%=1−H %, where ρ% refers to a relative density of the secondary particles, and H % refers to a porosity of the secondary particles.
Dependencies are inferred from the claim text.