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Lithium ion battery negative electrode material and preparation method thereof

A technology for lithium ion batteries and negative electrode materials, which is applied in battery electrodes, secondary batteries, chemical instruments and methods, etc., can solve the problems of complex synthesis methods, poor environmental friendliness, and poor cycle performance, and achieves simple synthesis methods and morphology. Easy-to-control, high rate-capable effects

Pending Publication Date: 2020-09-08
TIANNENG SAFT ENERGY JOINT CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, provide a lithium-ion battery negative electrode material and its preparation method, and aim to solve the complex synthesis method of the existing lithium-ion battery negative electrode material, high cost, low energy density, and poor cycle performance and poor environmental friendliness

Method used

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  • Lithium ion battery negative electrode material and preparation method thereof
  • Lithium ion battery negative electrode material and preparation method thereof
  • Lithium ion battery negative electrode material and preparation method thereof

Examples

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Embodiment 1

[0041] A negative electrode material for a lithium ion battery, comprising a hollow tubular NiO and a carbon coating covering the hollow tubular NiO; the preparation method of the negative electrode material for a lithium ion battery comprises the steps of:

[0042] S11: Prepare nickel nitrate solutions with a molar concentration of 0.1mol / L, 0.25mol / L, 0.5mol / L or 0.75mol / L respectively;

[0043] S12: adding 1.7-2 g of absorbent cotton to the nickel nitrate solution of different concentrations after being completely dissolved, soaking for 6 hours, and drying at 70° C. for 18 hours to obtain a precursor of absorbent cotton;

[0044] S13: Calcining the above-mentioned absorbent cotton precursor in an air atmosphere to obtain pure-phase nickel oxide (NiO);

[0045] The calcination process: firstly calcine at 300°C for 1 hour, and then calcine at 600°C for 2 hours.

Embodiment 2

[0047] A negative electrode material for a lithium ion battery, comprising a hollow tubular NiO and a carbon coating covering the hollow tubular NiO; the preparation method of the negative electrode material for a lithium ion battery comprises the steps of:

[0048] S21: preparing a nickel acetate solution with a molar concentration of 0.25mol / L;

[0049] S22: adding 1.8 g of absorbent cotton to the above-mentioned completely dissolved nickel acetate solutions of different concentrations, soaking for 6 hours, and drying at 70° C. for 18 hours to obtain a precursor of absorbent cotton;

[0050] S23: Calcining the above-mentioned absorbent cotton precursor in an air atmosphere to obtain pure-phase nickel oxide (NiO);

[0051] The calcination process: firstly calcine at 300°C for 1 hour, and then calcine at 600°C for 2 hours.

Embodiment 3

[0053] A negative electrode material for a lithium ion battery, comprising a hollow tubular NiO and a carbon coating covering the hollow tubular NiO; the preparation method of the negative electrode material for a lithium ion battery comprises the steps of:

[0054] S31: Select the best pure-phase NiO synthesized in the above-mentioned Example 1 and Example 2 as a precursor;

[0055] S32: adding the above-mentioned precursor pure-phase NiO to graphene oxide (GO) solutions with a concentration of 2 mg / mL, 4 mg / mL, and 6 mg / mL, respectively, heating, stirring, evaporating and crystallizing at 60°C, and obtaining a NiO / GO composite material;

[0056] S33: drying the above-mentioned NiO / GO composite material at 70° C. for 18 hours by blowing air to obtain an anode material.

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Abstract

The invention belongs to the technical field of lithium ion battery manufacturing, and particularly relates to a lithium ion battery negative electrode material and a preparation method thereof. The preparation method comprises the following steps: S1, preparing a nickel salt solution; S2, adding a biological template degreasing cotton into the completely dissolved nickel salt solution, soaking for 4-8 hours, and performing forced air drying to obtain a degreasing cotton precursor; S3, calcining the degreasing cotton precursor in an air atmosphere to obtain pure-phase nickel oxide (NiO); S4, taking the pure-phase nickel oxide (NiO) as a precursor, adding the precursor into a graphene oxide (GO) solution, heating and stirring at 40-75 DEG C, and performing evaporative crystallization to obtain a NiO / GO composite material; and S5, carrying out forced air drying on the NiO / GO composite material to obtain the negative electrode material. The lithium ion battery negative electrode materialprepared by the method has the advantages of low cost, simple synthesis method, strong operability, good electrochemical performance and the like.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery production, and in particular relates to a lithium-ion battery negative electrode material and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the modern electronics industry, the energy crisis has become increasingly serious, and energy utilization and environmental protection are facing huge challenges. People's demand for high-performance, lightweight and environmentally friendly energy storage devices is becoming stronger and stronger. As one of the most important energy storage and conversion devices, lithium-ion batteries (LIBs) have attracted great attention in academic research and commercial applications due to their outstanding advantages such as high energy density, long cycle life, no memory effect and environmental friendliness. Big attention. In lithium-ion batteries, due to the limitation of the structure of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/04C01B32/198H01M4/36H01M4/52H01M4/62H01M10/0525
CPCC01G53/04C01B32/198H01M4/366H01M4/523H01M4/625H01M10/0525C01P2002/72C01P2002/88C01P2004/03C01P2006/40C01B2204/22Y02E60/10
Inventor 郭鑫董雪周建中李明钧周翠芳施利勇孙伟
Owner TIANNENG SAFT ENERGY JOINT CO
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