Metal oxide and synthesis of lithium ion battery
The present application relates to a metal oxide and synthesis of a lithium ion battery. Specifically, the present application selects a cobalt oxide compound, which uses Co 3 O 4 as a main body, as a precursor of lithium cobalt oxide, and anion doping is performed in particles of Co 3 O 4 to obtain a doped precursor for lithium cobalt oxide. The general formula of the precursor can be expressed as Co 3 (O 1-y M y ) 4 , where about 0<y<about 0.2, and wherein the anion M comprises at least one of F, P, S, Cl, N, As, Se, Br, Te, I or At. The lithium ion battery with a cathode made of lithium cobalt oxide material prepared by using the precursor presents good cycle stability in a high voltage charge-discharge environment.
1. A lithium ion battery, comprising a cathode, an anode, a separator and electrolyte, wherein the cathode comprises a lithium cobalt oxide composite prepared by a metal oxide Co 3 (O 1-y M y ) 4 , the general formula of the lithium cobalt oxide composite being LiCo(O 1-y M y ) 2 , wherein the M comprises one of N, P, S, Cl, As, Se, Br, Te, and I, and about 0<y<about 0.2, and wherein a C-axis expansion rate in crystal cell parameters of the lithium cobalt oxide composite is 1.5%, 1.9%, or in a range of 2%-6%.
2. The lithium ion battery according to claim 1 , wherein the median diameter of the lithium cobalt oxide composite is in a range of about 10-35 μm.
3. The lithium ion battery according to claim 1 , wherein about 0.001≤y≤about 0.05.
4. The lithium ion battery according to claim 1 , wherein about 0.005≤y≤about 0.03.