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High nickel-inorganic nano-powder composite electrode material and preparation method thereof

An inorganic nanomaterial and inorganic nanotechnology, applied in the field of energy storage materials and electrochemistry, can solve the problem that the cycle stability of high-nickel ternary cathode materials cannot meet the requirements of the service life of power batteries, and achieve good cycle stability, thickness Uniform and uniform effect

Inactive Publication Date: 2018-09-11
广东迈纳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cycle stability of high-nickel ternary cathode materials is far from meeting the service life requirements of current power batteries.

Method used

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  • High nickel-inorganic nano-powder composite electrode material and preparation method thereof
  • High nickel-inorganic nano-powder composite electrode material and preparation method thereof
  • High nickel-inorganic nano-powder composite electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]A preparation method of an electrode material composited with high nickel and inorganic nanopowder, comprising the steps of:

[0043] 1) LiNi 0.81 co 0.09 mn 0.10 (OH) 2 The precursor and LiOH·H2O were blended once in a high-speed mixer according to the mass ratio of 1:1.03, the blending speed was 600rpm, and the blending time was 20min;

[0044] 2) The product obtained in step 1) is sintered once in a high-temperature muffle furnace, the sintering temperature is 810°C, the pure oxygen flow rate is 35L / min, and the sintering time is 8 hours;

[0045] 3) Grinding the product obtained in step 2) with a mortar, and then sieving in a mechanical vibrating sieve to obtain a product with a size below 400 mesh;

[0046] 4) with step 3) gained product and ZrO 2 Secondary blending is carried out in a high-speed mixer, and the mass of ZrO2 accounts for 0.20% of the total mass of raw materials. , the blending speed is 500rpm, and the blending time is 25min;

[0047] 5) The pr...

experiment example 1

[0051] Take LiNi 0.81 co 0.09 mn 0.10 o 2 @ZrO 2 and LiNi 0.81 co 0.09 mn 0.10 o 2 As the experimental object, determined by X-ray diffractometer,

[0052] like figure 1 shows that LiNi 0.81 co 0.09 mn 0.10 o 2 @ZrO 2 with LiNi 0.81 co 0.09 mn 0.10 o 2 The peak positions are basically the same, indicating that ZrO 2 cladding layer on LiNi 0.81 co 0.09 mn 0.10 o 2 The crystal structure of the LiNi 0.81 co 0.09 mn 0.10 o 2 Has high crystallinity.

[0053] like figure 2 As shown, LiNi 0.81 co 0.09 mn 0.10 o 2 @ZrO 2 The diameter is about 10-15 μm.

[0054] like image 3 As shown, LiNi 0.81 co 0.09 mn 0.10 o 2 @ZrO 2 Has high thermal stability.

[0055] like Figure 4 for LiNi 0.81 co 0.09 mn 0.10 o 2 @ZrO 2 FT-IR test results.

[0056] like Figure 5 for LiNi 0.81 co 0.09 mn 0.10 o 2 @ZrO 2 The Raman map.

[0057] like Image 6 As shown, LiNi 0.81 co 0.09 mn 0.10 o 2 @ZrO 2 The five elements of Ni, Co, Mn, O and Zr are ...

Embodiment 2

[0065] 1) LiNi 0.81 co 0.09 mn 0.10 (OH) 2 The precursor and LiOH·H2O were blended once in a high-speed mixer according to the mass ratio of 1:1.04, the blending speed was 650rpm, and the blending time was 25min;

[0066] 2) The product obtained in step 1) is sintered once in a high-temperature muffle furnace, the sintering temperature is 830°C, the pure oxygen flow rate is 40L / min, and the sintering time is 10 hours;

[0067] 3) Grinding the product obtained in step 2) with a mortar, and then sieving in a mechanical vibrating sieve to obtain a product with a size below 400 mesh;

[0068] 4) with step 3) gained product and TiO 2 Secondary blending in high speed mixer, TiO 2 The quality accounts for 0.25% of the total mass of raw materials, the blending speed is 1500rpm, and the blending time is 20min;

[0069] 5) The product obtained in step 4) is subjected to secondary sintering, the sintering temperature is 620°C, the flow rate of pure oxygen is 15L / min, and the sinter...

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Abstract

The invention discloses a high nickel-inorganic nano-powder composite electrode material and a preparation method thereof. The preparation method of the material includes processes of blending, sintering, grinding, screening and the like and has the advantages of simple process, low energy consumption and high yield. The composite electrode material is prepared from nickel-cobalt-manganese composite oxide; the nickel-cobalt-manganese composite oxide forms microspheres, and the microspheres are wrapped by a wrapping layer formed by an inorganic nano material; the composite electrode material can be used as a cathode active material of a lithium ion battery so that the electrochemical performance of the lithium ion battery can be greatly improved, meanwhile, the cycling stability and the rate capability of the lithium ion battery are improved, the defects of a ternary cathode material that the stability and the rate character are poor are overcome, the electrochemical performance of thelithium ion battery are well brought into play, and thus the material and the preparation method thereof have huge development potential in the field of lithium ion battery application.

Description

technical field [0001] The invention belongs to the technical field of energy storage materials and electrochemistry, and in particular relates to an electrode material compounded with high nickel and inorganic nanometer powder and a preparation method thereof. Background technique [0002] With the development of science and technology and the rapid growth of population, the energy crisis and environmental problems have become increasingly prominent. This prompts people to pay more attention to the establishment of a new and efficient energy supply system, which should meet the requirements of the environment while ensuring sustainable economic growth. Among them, the development of new energy and renewable clean energy is one of the most effective ways to solve these problems, and new energy materials are the basis and core to realize the development and utilization of new energy and support its development. In many new energy systems, such as wind energy, solar energy, a...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/485H01M4/505H01M4/525H01M4/58H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/364H01M4/485H01M4/505H01M4/525H01M4/58H01M10/0525Y02E60/10
Inventor 吴黎明潘刚平王选朋刘桥
Owner 广东迈纳科技有限公司
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