Cathode active material for secondary battery and method of manufacturing the same
AssigneeLG Chem, Ltd.
InventorsDong Kwon Lee, Seung Beom Cho, Jun Seok Nho, Wook Jang
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Abstract
Provided are a method of manufacturing a cathode active material including a first step of preparing a metal glycolate solution, a second step of mixing lithium-containing transition metal oxide particles and the metal glycolate solution and stirring in a paste state, a third step of drying the paste-state mixture, and a fourth step of performing a heat treatment on the dried mixture, a cathode active material including a metal oxide layer which is manufactured by the above method, and a secondary battery composed of a cathode including the cathode active material.
Claims18
A method of manufacturing a cathode active material, the method comprising steps of:
- a first step of preparing a metal glycolate solution comprising preparing a mixed solution by dispersing a metal precursor and a chelating agent in a glycol-based solvent, and performing primary heating on the mixed solution at a temperature within a range of 100° C. to 300° C., and then performing secondary heating on the mixed solution;
- a second step of mixing lithium-containing transition metal oxide particles and the metal glycolate solution and stirring in a paste state;
- a third step of drying the paste-state mixture;
- and
- a fourth step of forming a coating layer including metal oxide on the surface of the lithium-containing transition metal oxide particles by performing a heat treatment on the dried mixture,
- wherein a content ratio (parts by weight) of the metal precursor:the glycol-based solvent:the chelating agent is in a range of 1:1:0.1 to 1:500:20.
Dependencies are inferred from the claim text.