Ternary anode material and preparation method and application thereof, lithium ion battery and electric vehicle
A technology for lithium-ion batteries and cathode materials, applied in battery electrodes, batteries, secondary batteries, etc., can solve the problems of inability to effectively improve the cycle stability of ternary materials, easy dissolution of transition metal ions, and poor high-temperature performance of ternary materials , to achieve the effects of improving cycle stability and rate performance, reducing electrochemical activity, and improving electrical conductivity
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[0071] According to a second aspect of the present invention, a method for preparing the above-mentioned ternary positive electrode material is provided, comprising the following steps:
[0072] The ternary material, M1 y+2z-2x M2 x R1 y R2 z Dispersed with graphene in an alcohol solvent, separated to obtain solid phase components, and then heat-treated to coat the surface of the ternary material with M1 y+2z-2x M2 x R1 y R2 z and graphene to obtain a ternary cathode material.
[0073] In the present invention, the ternary cathode material can be prepared by mixing the raw materials, separating them, and then performing heat treatment. The technological process is simple, the operation is simple and convenient, and it is easy to implement. The processing raw material has a wide source, is economically easy to obtain, and is a non-toxic and environment-friendly raw material. The invention has no special restrictions on the environment, site, equipment, etc. The raw mate...
Embodiment 1
[0088] 1. Ternary cathode material
[0089] A kind of ternary cathode material, comprises ternary material (LiNi 0.6 co 0.2 mn 0.2 o 2 ) and the cladding layer coated on the surface of the ternary material, the cladding layer includes K 2 h 2 PO 4 and graphene.
[0090] Among them, K 2 h 2 PO 4 The mass percentage content in the ternary positive electrode material is 2%, and the mass percentage content of graphene in the ternary positive electrode material is 1%.
[0091] 2. Preparation of ternary cathode materials
[0092] (1) The ternary material, K 2 h 2 PO 4 and graphene are dispersed in ethanol, and the dispersion is by stirring, the stirring speed is 800r / s, the temperature is 40°C, and the stirring time is 10h.
[0093] (2) Obtain the solid phase components through suction filtration, and then heat-treat the solid phase components to make the surface of the ternary material coated with K 2 h 2 PO 4 and graphene to obtain a ternary positive electrode mater...
Embodiment 2-10
[0095] The difference between embodiment 2-10 and embodiment 1 is that M1 y+2z-2x M2 x R1 y R2 z different, as shown in Table 1.
[0096] M1 in Table 1 embodiment 2-10 y+2z-2x M2 x R1 y R2 z Specific types of
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