Precursor of ternary material

A technology of ternary materials and precursors, which is applied in the direction of electrical components, electrochemical generators, battery electrodes, etc., can solve the problems of large differences in particle size distribution, which are not conducive to improving the rate performance of materials

Inactive Publication Date: 2020-07-07
RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large difference in particle size distribution, i

Method used

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  • Precursor of ternary material

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Add 0.3g of polyethylene glycol 4000 into 40ml of deionized water, stir magnetically for 30min until the solution is evenly mixed; then add 0.8mmol of nickel nitrate, 0.1mmol of cobalt nitrate and 0.1mmol of manganese nitrate into the solution, stir magnetically for 1h until clarification, turn to Put it into a 50ml reaction kettle, react at 150°C for 24h; filter and wash the reactant, and dry it in an oven at 60°C for 18h to obtain the flower-like structure Ni 0.8 mn 0.1 co 0.1 (OH) 2 Ternary material precursors. It looks like figure 1 Shown is a three-dimensional flower-like structure assembled from nanosheets.

Embodiment 2

[0033] Add 0.3g of polyethylene glycol 4000 into 40ml of deionized water, stir magnetically for 30min until the solution is evenly mixed; then add 0.333mmol of nickel nitrate, 0.333mmol of cobalt nitrate and 0.333mmol of manganese nitrate into the solution, stir magnetically for 1h until clarification, turn to into a 50ml reactor, and reacted at 180°C for 24h; the reactant was filtered and washed, and dried in an oven at 60°C for 18h to obtain a three-dimensional flower-like structure Ni 1 / 3 mn 1 / 3 co 1 / 3 (OH) 2 Ternary material precursors.

Embodiment 3

[0035] Add 0.4g of polyethylene glycol 4000 into 40ml of deionized water, stir magnetically for 30min until the solution is evenly mixed; then add 0.6mmol of nickel nitrate, 0.2mmol of cobalt nitrate and 0.2mmol of manganese nitrate into the solution, stir magnetically for 1h until clarification, turn to into a 50ml reactor, and reacted at 180°C for 24h; the reactant was filtered and washed, and dried in an oven at 60°C for 18h to obtain a three-dimensional flower-like structure Ni 0.6 mn 0.2 co 0.2 (OH) 2 Ternary material precursors.

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Abstract

The invention belongs to the field of precursor preparation, and particularly relates to a ternary material precursor. The precursor is characterized in that the microstructure of the precursor is a three-dimensional flower-like structure assembled by nanosheets with specific thickness. The precursor is prepared by adopting the steps of (1) dissolving a surfactant into deionized water, and conducting magnetic stirring until uniform mixing to obtain a solution A, (2) adding nickel salt, cobalt salt and manganese salt into the solution A in the step (1) according to a stoichiometric ratio, conducting magnetic stirring for 1-2 hours to obtain a solutions B, putting the solution B into a 50ml polytetrafluoroethylene lining with the filling degree of 80%, putting the polytetrafluoroethylene lining into a stainless steel hydrothermal kettle, reacting, and filtering to obtain a precipitate; and (3) washing the precipitate obtained in the step (2) with ethanol, and carrying out drying treatment in a constant-temperature blast drying oven so as to obtain a precursor with a three-dimensional flower-like structure microstructure. The precursor is small in distribution difference, the specificsurface area is increased, the migration path and rate are improved, and the rate capability of the material is improved.

Description

technical field [0001] The invention belongs to the field of precursor preparation, and in particular relates to a precursor of a ternary material. Background technique [0002] As a green power source, lithium-ion batteries have been widely used in mobile phones, Laptop computers, digital equipment and other fields. With the intensification of the energy crisis and environmental pollution crisis, lithium-ion batteries are gradually being used in the fields of aerospace, military equipment and electric vehicles. This also puts forward higher requirements on the performance of lithium-ion batteries. The most effective way is to develop electrode materials with excellent electrochemical properties. At present, the technical bottleneck of lithium-ion batteries is mainly concentrated in the cathode material. Therefore, the development of cathode materials with high energy density and high rate performance has become a top priority. [0003] At present, commonly used cathode ...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525H01M2004/021Y02E60/10
Inventor 高云王兴勤刘建红马婧
Owner RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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