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Preparation method of high-performance lithium battery negative electrode material

A negative electrode material, lithium battery technology, applied in battery electrodes, active material electrodes, negative electrodes, etc., can solve the problems of fast capacity decay, poor rate capability, poor stability, etc., and achieve low cost, excellent electrical performance, and improved safety. Effect

Pending Publication Date: 2021-03-16
TIANNENG SAFT ENERGY JOINT CO
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  • Description
  • Claims
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Problems solved by technology

But pure MoS 2 The material still exhibits disadvantages such as poor stability, fast capacity decay, and poor rate capability, which seriously hinder its application in lithium-ion batteries.

Method used

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  • Preparation method of high-performance lithium battery negative electrode material
  • Preparation method of high-performance lithium battery negative electrode material
  • Preparation method of high-performance lithium battery negative electrode material

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Embodiment 1

[0033] A method for preparing a high-performance lithium battery electric negative electrode material, comprising the steps of:

[0034] S1. In a mixed solvent system composed of 80 mL of ethanol and 40 mL of acetonitrile, 4 mg of n-butyl titanate was injected instantaneously under rapid stirring, kept stirring for 3 hours, and washed with ethanol to prepare TiO 2 microspheres, and keep them for future use;

[0035] S2. Take out the TiO of S1 2 Put the microspheres in a polytetrafluoroethylene reactor, add 35g of deionized water and stir for 1h, then add 0.12g of analytical grade CTAB, and keep stirring for 10min until CTAB is completely dissolved;

[0036] S3. Weigh 2.2 g of analytically pure sodium molybdate and 3.5 g of analytically pure thioacetamide and add it to the mixed solution of S2, and continue stirring for 15 to 20 minutes until the added sodium molybdate and thioacetamide are dissolved;

[0037] S4. Capping and tightening the reaction kettle, putting it into a ...

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Abstract

The invention belongs to the technical field of lithium battery manufacturing, and particularly relates to a preparation method of a high-performance lithium battery negative electrode material, whichis characterized in that spherical TiO2 with a micron size is selected as a loading template according to the shape and size of MoS2, the spherical TiO2 and the MoS2 are matched in size, sodium molybdate is used as a molybdenum source, thioacetamide is used as a sulfur source, cetyl trimethyl ammonium bromide (CTAB) is used as an activating agent, and flaky MoS2 is successfully loaded on the surface of TiO2 by a hydrothermal synthesis experimental method to obtain a TiO2 / MoS2 composite material with a core-shell structure. The material has the advantages of synergistic effect, more excellentelectrical property, higher capacity, good cycling stability, rate capability and the like, has high metal component content, can replace a carbon material in an original battery, is nonflammable andgreat improves the safety of a lithium ion battery.

Description

technical field [0001] The invention belongs to the technical field of lithium battery manufacturing, and in particular relates to a preparation method of a high-performance lithium battery negative electrode material. Background technique [0002] As the consumption of traditional energy accelerates and the cost of mining rises, the development of new energy has attracted more and more attention from governments. As the most commercially successful new energy industry, lithium-ion batteries have been sought after by all parties. Among them, graphite has become the most widely used negative electrode material for lithium-ion batteries because of its cheap, non-toxic, and abundant raw material sources. [0003] However, as an anode material that has been widely used, graphite shows a relatively low theoretical lithium storage capacity (372mAh / g), which is difficult to meet people's demand for long battery life in the future. Compared with graphite, 2D transition metal sulfide...

Claims

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Application Information

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IPC IPC(8): C01G23/053C01G39/06H01M4/36H01M4/58H01M4/62H01M10/0525
CPCC01G23/053C01G39/06H01M4/366H01M4/5815H01M4/628H01M10/0525H01M2004/021H01M2004/027C01P2004/03C01P2004/04C01P2004/80C01P2004/62C01P2004/32C01P2002/85Y02E60/10
Inventor 许伟周翠芳秦作路周建中李明钧张萍毛鸥
Owner TIANNENG SAFT ENERGY JOINT CO
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