Preparation method of molybdenum disulfide composite carbon composite electrode material with polyphosphazene as carbon source

A composite electrode and polyphosphazene technology, applied in the direction of negative electrode, battery electrode, secondary battery, etc., can solve the problems of volume change and unstable electrochemical performance, and achieve the effect of avoiding volume change and high specific surface area

Inactive Publication Date: 2017-10-13
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electrode still has lithium ion intercalation and desorption process to trigger MoS 2 The problem of volume change leads to its actual electrochemical performance is not stable

Method used

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  • Preparation method of molybdenum disulfide composite carbon composite electrode material with polyphosphazene as carbon source
  • Preparation method of molybdenum disulfide composite carbon composite electrode material with polyphosphazene as carbon source
  • Preparation method of molybdenum disulfide composite carbon composite electrode material with polyphosphazene as carbon source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take 0.064g MoS 2 In 500ml of acetonitrile solution, sonicate in an ultrasonic cell pulverizer for 1h, then transfer the solution to a 500ml round bottom flask, and sonicate in an ultrasonic bath for 30min. Then add 0.345g HCCP and 0.595gBPS into the round bottom flask, and ultrasonicate in the ultrasonic bath for 30min. Slowly add 50ml of TEA dropwise and oscillate. After the addition is complete, ultrasonicate at 300w for 5h. The solution obtained after ultrasonication was centrifuged in a high-speed centrifuge (6000r / min, 5min / time), the obtained solid was washed and centrifuged three times with absolute ethanol and deionized water respectively, and the product was dried in a vacuum oven (60°C) After 24 hours, in a tube furnace (heat up to 300°C at a speed of 5°C / min, then raise the temperature to 500°C at a speed of 2°C / min, keep warm for 1 hour, then raise the temperature to 900°C at a speed of 5°C / min, after 1 hour of heat preservation Cool down to 300°C at a ra...

Embodiment 2

[0035] Others are the same as in Example 1, except that the ultrasonic power of the reaction is 400w. The resulting MoS 2 The particles of @C composite material have better dispersibility, and the diameter is 275-385nm.

Embodiment 3

[0037] Others are the same as in Example 1, except that the ultrasonic power of the reaction is 500w. Its SEM picture see figure 1 , the desorption adsorption diagram and pore size distribution diagram of nitrogen gas are shown in figure 2 , it can be seen from the figure that the obtained MoS 2 @C composite particles have good dispersion, with a diameter of 483-502nm, and a hysteresis loop on the curve, indicating that the material has a pore structure and a specific surface area of ​​5.5m 2 / g, the pore volume is 0.035cm 3 / g.

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Abstract

The invention provides a preparation method of a lithium battery composite carbon electrode material. The preparation method comprises the steps of taking hexachlorocyclotriphosphazene (HCCP) and 4,4'-dihydroxy diphenyl sulfone (BPS) as raw materials; taking triethylamine (TEA) as an acid-binding agent; preparing polyphosphazene microspheres coated with MoS2 through a one-step precipitation polymerization method under an ultrasonic effect; carbonizing the polyphosphazene microspheres at a high temperature to obtain an MoS2@C composite material, wherein the MoS2@C composite material can be used as an electrode material. The preparation method of the lithium battery composite carbon electrode material has the effects and advantages that the prepared MoS2@C composite material has high specific area, good circulation, high-current charging and discharging stability, high specific capacitance and the like.

Description

(1) Technical field [0001] The invention relates to a method for preparing a molybdenum disulfide composite carbon composite electrode material with polyphosphazene as a carbon source. (2) Background technology [0002] In recent years, research on electrode materials for lithium-ion batteries has mainly focused on improving charge and discharge efficiency, improving battery life, and increasing the specific surface area of ​​materials. The current research is mainly on the surface modification of carbon materials, including surface attachment of nano phases, formation of nano pores on the surface, and the application of other nanotechnology. There are a lot of research results, and it also shows that the development prospects of lithium-ion batteries are very promising. [0003] Molybdenum disulfide (MoS 2 ) is used as a lithium-ion battery anode material with a large theoretical capacity, and is a promising electrode material choice; functional polyphosphazene micro-nano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/366H01M4/5815H01M4/625H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 周泽平魏晓娟陈枫赵正平范萍杨晋涛钟明强
Owner ZHEJIANG UNIV OF TECH
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