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lithium ion battery 2 the s 4 The preparation method of/graphene composite negative electrode material

A graphene composite, lithium-ion battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as low energy density of lithium-ion battery negative electrode materials, easy agglomeration of transition metal sulfides, and unsatisfactory cycle performance. , to achieve the effect of facilitating electron transport, easy control of the synthesis process, and shortening of the intercalation/deintercalation path

Active Publication Date: 2021-03-26
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of lithium ion battery NiCo 2 S 4 / The preparation method of graphene composite negative electrode material is to solve the problems of low energy density and unsatisfactory cycle performance of lithium-ion battery negative electrode materials in order to solve the problem that transition metal sulfides are easy to agglomerate and easy to react with electrolyte and decompose

Method used

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  • lithium ion battery <sub>2</sub> the s <sub>4</sub> The preparation method of/graphene composite negative electrode material
  • lithium ion battery <sub>2</sub> the s <sub>4</sub> The preparation method of/graphene composite negative electrode material
  • lithium ion battery <sub>2</sub> the s <sub>4</sub> The preparation method of/graphene composite negative electrode material

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Embodiment 1

[0036] A lithium-ion battery NiCo 2 S 4 The preparation method of / graphene composite negative electrode material, operation steps are as follows:

[0037] (1) Carry out alkali treatment and acid treatment, cleaning, drying to ion exchange resin successively;

[0038] (2) Add the ion exchange resin obtained after drying in step (1) to a mixed solution of 0.1mol / L nickel acetate tetrahydrate and 0.2mol / L cobalt acetate tetrahydrate, stir for 12 hours, remove the solution, dry and pulverize ;

[0039] (3) adding potassium hydroxide pore-forming agent to the material obtained after being pulverized in step (2) in a mass ratio of 1:1, stirring evenly, and drying;

[0040] (4) Put the obtained material after drying in step (3) into a tube furnace, and under the protection of an argon flow rate of 40cc / min, rise from room temperature to 550°C with a heating rate of 5°C / min, and then Rise to 850°C at 2°C / min and treat at high temperature for 2h, cool to room temperature, wash with...

Embodiment 2

[0049] A lithium-ion battery NiCo 2 S 4 The preparation method of / graphene composite negative electrode material, operation steps are as follows:

[0050] (1) Carry out alkali treatment and acid treatment, cleaning, drying to ion exchange resin successively;

[0051] (2) Add the ion exchange resin obtained after drying in step (1) to a mixed solution of 0.1mol / L nickel acetate tetrahydrate and 0.1mol / L cobalt chloride hexahydrate, stir for 12h, remove the solution, dry, crush;

[0052] (3) adding potassium hydroxide pore-forming agent to the obtained substance after being pulverized in step (2) in a mass ratio of 1:2, stirring evenly, and drying;

[0053] (4) Put the obtained material after drying in step (3) into a tube furnace, and under the protection of an argon flow rate of 40cc / min, rise from room temperature to 550°C with a heating rate of 5°C / min, and then Rise to 850°C at 2°C / min and treat at high temperature for 2h, cool to room temperature, wash with water for 1...

Embodiment 3

[0057] A lithium-ion battery NiCo 2 S 4 The preparation method of / graphene composite negative electrode material, operation steps are as follows:

[0058] (1) Carry out alkali treatment and acid treatment, cleaning, drying to ion exchange resin successively;

[0059] (2) Add the ion exchange resin obtained after drying in step (1) to a mixed solution of 0.1mol / L nickel acetate tetrahydrate and 0.3mol / L cobalt chloride hexahydrate, stir for 12h, remove the solution, dry, crush;

[0060] (3) adding potassium bicarbonate pore-forming agent to the obtained substance after being pulverized in step (2) in a mass ratio of 1:3, stirring evenly, and drying;

[0061] (4) Put the obtained material after drying in step (3) into a tube furnace, and under the protection of an argon flow rate of 40cc / min, rise from room temperature to 550°C with a heating rate of 5°C / min, and then Rise to 850°C at 2°C / min and treat at high temperature for 2h, cool to room temperature, wash with water for...

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Abstract

The invention discloses a preparation method of a NiCo2S4 / graphene composite anode material of a lithium ion battery. The preparation method comprises following steps of (1) pretreating resin in sequence; (2) adding the resin to a catalyst metal salt solution, stirring, stoving and smashing, wherein the metal salt solution is a mixture of a nickel salt solution and a cobalt salt solution; (3) adding a pore-forming agent, stirring uniformly, and stoving; (4) under protection of inert atmosphere, treating for 1-3 hours at high temperature of 500-900DEG C, cooling to room temperature, water washing, filtering and stoving; (5) preparing into a mixed solution together with a sulfur-containing compound, performing hydrothermal reaction for 12-24 hours at 160-200DEG C, filtering, water washing and drying; and (6) under protection of inert atmosphere, treating for 1-3 hours at high temperature of 500-700DEG C, cooling and obtaining the NiCo2S4 / graphene composite anode material of the lithium ion battery. The battery anode material prepared by the method has good conductivity, high specific surface area, and very good cycle stability.

Description

technical field [0001] The invention relates to the technical field of lithium battery negative electrode materials, in particular to a lithium ion battery NiCo 2 S 4 / Preparation method of graphene composite negative electrode material. Background technique [0002] In recent years, the problem of environmental pollution and energy shortage has become increasingly serious, and it is urgent to develop new energy sources with high efficiency, greenness and environmental protection. Among them, lithium-ion batteries have high voltage, high energy density for charging and discharging, small and light weight, high power density, and use It is widely used in energy storage devices such as portable electronic devices and electric vehicles due to its advantages such as long life. The continuous expansion of the use of lithium-ion batteries and the rapid demand for portable electronic products have promoted the continuous research and development of new lithium-ion electrode mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCY02E60/10
Inventor 沈培康陈海军马旭东
Owner GUANGXI UNIV