Cathode material for secondary lithium batteries and preparation method
OwnerJay Jie Shiinventor
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Abstract
In the invention, a cathode material for secondary lithium batteries was disclosed. It is a material with composite structures formed with more than two different components selected from a general formula [LiaM1-yM′yObXc]n. The composite structures are formed between crystal clusters within primary particles and/or between primary particles. Methods for making such a cathode material were also disclosed in the invention. The cathode material has composite structures formed by compositing different components at nanometer level, which can integrate benefits of different components, resulting in better overall comprehensive properties.
Claims22
A cathode material for secondary lithium batteries, characterized in that:
- being a composite structural material formed by compositing more than two different components selected from a general formula of [LiaM1-yM′yObXc]n;
- said composite structures are formed between crystal clusters within primary particles and/or between primary particles;
- where M is any one of Ni, Co, Mn, Ti, V, Fe and Cr, M′ is any one of Mg, Al, Ca, Sr, Zr, Ni, Co, Mn, Ti, V, Fe, Cr, Zn, Cu, Si, Na and K or combinations of two or more than two of them;
- X is any one of F, S, N, P and Cl;
- wherein 0.5≦a≦1.5, 0≦y≦1,1≦b≦2.1, 0≦c≦0.5, 1≦n≦2.
Dependencies are inferred from the claim text.