Lithium zirconium titanium phosphate modified lithium-rich material and preparation method thereof
A technology of lithium titanium zirconium phosphate and lithium-rich materials, applied in active material electrodes, electrical components, electrochemical generators, etc., can solve the problems of short cycle times and poor electrochemical performance, and achieve less environmental pollution and better The effect of high rate discharge performance and good cycle stability
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Embodiment 1
[0044]A lithium titanium zirconium phosphate modified lithium-rich material: the chemical formula of the composite mLi[Li 0.4 Ni 0.16 Co 0.16 Mn 0.495 Zr 0.175 ]O 2 ·nLiTi 0.25 Zr 1.75 (PO 4 ) 3 , n / (m+n)=0.01, the mass percentage of the lithium titanium zirconium phosphate is 1 wt %, and the lithium titanium zirconium phosphate forms a uniform coating layer with a thickness of 10 nm in an amorphous state; the positive electrode material is a particle Secondary spherical particles with a diameter of 6 to 10 μm.
[0045] like figure 1 As shown, the thickness of the titanium zirconium lithium phosphate coating layer on the surface of the positive electrode composite material obtained in Example 1 of the present invention is 10 nm.
[0046] like figure 2 As shown, the positive electrode composite material obtained in the example of the invention contains lithium titanium zirconium phosphate and is a pure phase.
[0047] like Figure 5 As shown, the lithium-titanium ...
Embodiment 2
[0052] A lithium titanium zirconium phosphate modified lithium-rich material: the chemical formula of the composite is mLi[Li 0.4 Ni 0.16 Co 0.16 Mn 0.48 Zr 0.19 ]O 2 ·nLiTi 0.1 Zr 1.9 (PO 4 ) 3 , n / (m+n)=0.015, the mass percentage of the lithium titanium zirconium phosphate is 1.5wt%, and the lithium titanium zirconium phosphate forms a uniform coating layer in an amorphous state; the positive electrode material is a particle size of 6 ~10 μm secondary spherical particles.
[0053] After testing, the lithium-titanium zirconium phosphate modified lithium-rich material obtained in the embodiment of the present invention contains lithium titanium zirconium phosphate and is a pure phase.
[0054] After testing, the lithium titanium zirconium phosphate modified lithium-rich material obtained in the embodiment of the present invention is a secondary spherical particle with a particle size of 6-10 μm, and the surface has a coating layer formed by the lithium titanium zircon...
Embodiment 3
[0060] A lithium titanium zirconium phosphate modified lithium-rich material: the chemical formula of the composite is mLi[Li 0.4 Ni 0.16 Co 0.16 Mn 0.49 Zr 0.18 ]O 2 ·nLiTi 0.2 Zr 1.8 (PO 4 ) 3 , n / (m+n)=0.005, the mass percentage of the lithium titanium zirconium phosphate is 0.5wt%, and the lithium titanium zirconium phosphate forms a uniform coating layer in an amorphous state; the positive electrode material is a particle size of 6 Secondary spherical particles of ~10 μm, lithium titanium zirconium phosphate form a uniform coating layer with a thickness of 8 nm in an amorphous state.
[0061] After testing, the lithium titanium zirconium phosphate modified lithium-rich material obtained in the embodiment of the present invention is a secondary spherical particle with a particle size of 6-10 μm, and the surface has a coating layer formed by the lithium titanium zirconium phosphate in an amorphous state.
[0062] After testing, the thickness of the titanium zirconi...
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Abstract
Description
Claims
Application Information
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