Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of graphite-molybdenum sulfide nano-composite negative electrode material of ion battery

A negative electrode material and nanomaterial technology, which is applied in the field of preparation of graphite molybdenum sulfide nanocomposite negative electrode materials for ion batteries, can solve problems such as poor electrical conductivity, and achieve the effects of long service life, stable structure, and stable cycle performance

Inactive Publication Date: 2013-03-27
SUZHOU YIYUAN HONGDA INTPROP AGENCYCO
View PDF4 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as an electrode material for electrochemical reactions, MoS 2 poor electrical conductivity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Preparation of graphite oxide nanomaterials

[0016] The natural graphite material is crushed by a pulverizer to a particle size of 50nm-10μm, and a specific surface area of ​​50-750m 2 / g, add sodium borate to the raw materials crushed to the qualified parameters, add the weight of additives to be 2% of the raw materials, mix in the mixer for 2 hours, put the mixed materials in the graphitization furnace for purification and graphitization treatment, and heat at 2500 °C Continue to feed chlorine gas to remove the metal impurities in the graphite, and then the processed graphite material can be obtained.

[0017] Disperse the processed graphite material in concentrated sulfuric acid in an ice bath at 0°C, and add KMnO with stirring 4 , where graphite material, concentrated sulfuric acid and KMnO are shown 4 The mass ratio is 1:10:3, the stirring time is 20 minutes, the temperature rises to about 40°C, add deionized water 3 times the volume of the stirred mixture, cont...

Embodiment 2

[0024] Preparation of graphite oxide nanomaterials

[0025] The natural graphite material is crushed by a pulverizer to a particle size of 50nm-10μm, and a specific surface area of ​​50-750m 2 / g, add sodium borate to the raw materials crushed to the qualified parameters, add the weight of additives to be 3% of the raw materials, mix in the mixer for 3 hours, put the mixed materials in the graphitization furnace for purification and graphitization treatment, at 3000 ℃ Continue to feed chlorine gas to remove the metal impurities in the graphite, and then the processed graphite material can be obtained.

[0026] Disperse the processed graphite material in concentrated sulfuric acid in an ice bath at 0°C, and add KMnO with stirring 4 , where graphite material, concentrated sulfuric acid and KMnO are shown 4 The mass ratio is 1:5:4, the stirring time is 40 minutes, the temperature rises to about 45°C, add deionized water 5 times the volume of the stirred mixture, continue stirri...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a graphite-molybdenum sulfide nano-composite negative electrode material of an ion battery. The method comprises the following steps of: (1) treating a natural graphite material to obtain a purified graphite material; (2) preparing a graphene oxide solution from graphene oxide, adding ammonium thiomolybdate into the graphene oxide solution, respectively reducing the ammonium thiomolybdate and the graphene oxide to obtain MoS2 and graphene at the same time, and heating to obtain a MoS2 / graphene composite nanomaterial; and (3) mixing the composite nanomaterial, carbon black and an N-methyl pyrrolidone solution containing polyvinylidene fluoride to obtain uniform paste to be used as a reserved composite negative electrode material. The graphite-molybdenum sulfide nano-composite negative electrode material prepared by the invention has stable cycle performance besides high energy density, and has the advantages of high specific capacity, high cycle performance and long service life when being used as the negative electrode material of a lithium ion battery.

Description

Technical field [0001] The invention relates to a method for preparing an ion battery graphite molybdenum sulfide nanocomposite negative electrode material. Background technique [0002] The trend of miniaturization, high energy, and portability of electronic appliances, the development of space technology, the demand for national defense equipment, and the research and development of electric vehicles have higher requirements for the performance of lithium-ion batteries. The improvement of lithium-ion battery performance mainly depends on the improvement of energy density and cycle life of lithium intercalation electrode materials. Since the birth of lithium-ion batteries, research on negative electrode materials has mainly focused on: graphitized carbon materials, amorphous carbon materials, nitrides, silicon-based materials, tin-based materials, new alloys, nano-oxides and other materials, among which Graphitized carbon materials are the mainstream in today's commercial ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/583
CPCY02E60/12Y02E60/10
Inventor 王媛媛
Owner SUZHOU YIYUAN HONGDA INTPROP AGENCYCO