Preparation method of anode material for lithium-ion batteries

A technology for lithium ion batteries and negative electrode materials, which is applied in battery electrodes, secondary batteries, circuits, etc., to achieve the effects of low requirements, excellent cycle stability performance, and low equipment requirements

Active Publication Date: 2017-11-28
山西宝光新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing NiCo 2 o 4 There are many preparation processes, but the reaction conditions are simple and the structure is controllable, which can effectively prepare porous NiCo 2 o 4 There are very few processes for submicron cubic structures, and further research is needed

Method used

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  • Preparation method of anode material for lithium-ion batteries
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  • Preparation method of anode material for lithium-ion batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Weigh 0.249g nickel acetate tetrahydrate, and 0.498g cobalt acetate tetrahydrate and 3.6g urea, put them into a clean beaker, add 30ml ethylene glycol and deionized water mixed solution (ethylene glycol and deionized water mixed solution The volume ratio is 5:1) and fully stirred into a uniform clear solution;

[0029] (2) Transfer the homogeneously mixed and clear solution in step (1) to a reaction kettle with a polytetrafluoroethylene liner, seal it completely, heat it at a constant temperature of 120°C for 12 hours, take out the liner, and pour off the upper layer of waste liquid , add water and transfer to a centrifuge tube of a designated model for centrifugation, and wash with deionized water and absolute ethanol three times;

[0030] (3) Put the purple sample obtained in step (2) into a drying oven, adjust to 80° C., and dry to obtain a purple solid powder;

[0031] (4) Put the purple solid obtained in step (3) into a fully dried quartz boat, and place it in...

Embodiment 2

[0039](1) Weigh 0.249g nickel acetate tetrahydrate, and 0.498g cobalt acetate tetrahydrate and 3.6g urea, put them into a clean beaker, add 30ml ethylene glycol and deionized water mixed solution (ethylene glycol and deionized water mixed solution The volume ratio is 2:1) and fully stirred into a uniform clear solution;

[0040] (2) Transfer the homogeneously mixed and clear solution in step (1) to a reaction kettle with a polytetrafluoroethylene liner, seal it completely, heat it at a constant temperature of 120°C for 12 hours, take out the liner, and pour off the upper layer of waste liquid , add water and transfer to a centrifuge tube of a designated model for centrifugation, and wash with deionized water and absolute ethanol three times;

[0041] (3) Put the purple sample obtained in step (2) into a drying oven, adjust to 80° C., and dry to obtain a purple solid powder;

[0042] (4) Put the purple solid obtained in step (3) into a fully dried quartz boat, and place it in ...

Embodiment 3

[0044] (1) Weigh 0.249g nickel acetate tetrahydrate, and 0.498g cobalt acetate tetrahydrate and 3.6g urea, put them into a clean beaker, add 30ml ethylene glycol and deionized water mixed solution (ethylene glycol and deionized water mixed solution The volume ratio is 1:1) and fully stirred into a uniform and clear solution;

[0045] (2) Transfer the homogeneously mixed and clear solution in step (1) to a reaction kettle with a polytetrafluoroethylene liner, seal it completely, heat it at a constant temperature of 120°C for 12 hours, take out the liner, and pour off the upper layer of waste liquid , add water and transfer to a centrifuge tube of a designated model for centrifugation, and wash with deionized water and absolute ethanol three times;

[0046] (3) Put the purple sample obtained in step (2) into a drying oven, adjust to 80° C., and dry to obtain a purple solid powder;

[0047] (4) Put the purple solid obtained in step (3) into a fully dried quartz boat, and place i...

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Abstract

The invention discloses a preparation method of an anode material for lithium-ion batteries. According to the preparation method, urea is taken as a precipitating agent, nickel acetate tetrahydrate is taken as a nickel source, cobalt acetate tetrahydrate is taken as a cobalt source, ethylene glycol and deionized water are taken as solvents, and the anode material, which has a monodisperse porous NiCo2O4 submicron cube structure, for the lithium-ion batteries is prepared by means of a mixed solvent thermal method and a precursor annealing method. The method takes the ethylene glycol and the deionized water as reaction solvents, so that the NiCo2O4 submicron cube which is high in dispersibility and has a porous structure can be obtained only by using the mixed solvent thermal method and the precursor annealing method; the prepared anode material has first discharge capacity reaching up to 1380mAh/g under the high current density of 1A/g, and still has discharge capacity of 607mAh/g after 300-time cycling so as to have excellent cyclic stability; in a preparation process of the anode material, the requirements for a dispersion system solution are low, the solvents are convenient and easy to obtain, harmful substances are not produced, and the preparation method is environmentally-friendly; the method is simple in preparation technology, low in requirements for equipment and short in production cycle; the prepared product is larger in amount and free from impurities, thus being suitable for large-scale production.

Description

technical field [0001] The invention relates to a preparation method of a negative electrode material of a lithium ion battery, belonging to the field of controllable preparation of micro-nano structures. Background technique [0002] Inorganic materials with micro-nano structures (such as: nanosheets, nanowires, nanoflowers, sea urchin-shaped hollow microspheres, etc.) have the advantages of large specific surface area, rich pores, high active sites, and stable structure. The application research of new inorganic functional materials is of great significance. NiCo 2 o 4 It is a double-metal transition metal oxide with a spinel structure. In recent years, like other inorganic materials, NiCo with different micro-nano structures 2 o 4 It has been prepared, and its application research in lithium-ion batteries, supercapacitors, electrocatalysis and photoelectric devices has attracted extensive attention. [0003] Existing NiCo 2 o 4 There are many preparation processes,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/52H01M10/0525
CPCH01M4/523H01M10/0525Y02E60/10
Inventor 张永兴王飞李佳李德川李兵刘忠良
Owner 山西宝光新材料科技有限公司
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