Preparation method of three-dimensional foamed MoS2/graphene

A foamed graphene and graphene technology, applied in the field of electrochemistry, can solve the problems of low initial charging efficiency, interlayer graphite peeling, low volume energy density, etc., and achieve easy operation and industrial production, reduce raw material loss, and high cycle stability. sexual effect

Inactive Publication Date: 2015-12-23
JIANGSU XINGUANG ENVIRONMENTAL PROTECTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The covalent bond has good electrical conductivity, the distance between layers is 340pm, and it has a good intercalation lithium storage capacity. Graphite, as the negative electrode material of lithium-ion batteries, also has obvious shortcomings and limitations.
There are many surface defects in graphite, and it is difficult to form a uniform and dense SEI film at one time during the first dis

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A three-dimensional foam MoS 2 / The preparation method of graphene, is characterized in that comprising the following steps:

[0018] (1) Three-dimensional MoS 2 Preparation of the reaction raw material solution: a mixed solution of ammonium tetrathiomolybdate and dimethylformamide was prepared as three-dimensional MoS 2 reaction raw material solution;

[0019] (2) Immerse the three-dimensional foamed graphene into the three-dimensional MoS prepared in step (1) 2 Soak in the reaction raw material solution for 15min, subject to complete immersion. After soaking, take it out and place it in a vacuum drying oven to dry at 70°C for 25min;

[0020] (3) Re-immersion of 3D foamed graphene into 3D MoS after drying 2 The reaction raw material solution, repeat the operation of step (2) 5 times to obtain ammonium tetrathiomolybdate / three-dimensional foamed graphene;

[0021] (4) placing the ammonium tetrathiomolybdate / three-dimensional foamed graphene obtained in step (3) in...

Embodiment 2

[0024] A three-dimensional foam MoS 2 / The preparation method of graphene, is characterized in that comprising the following steps:

[0025] (1) Three-dimensional MoS 2 Preparation of the reaction raw material solution: a mixed solution of ammonium tetrathiomolybdate and dimethylformamide was prepared as three-dimensional MoS 2 reaction raw material solution;

[0026] (2) Immerse the three-dimensional foamed graphene into the three-dimensional MoS prepared in step (1) 2 Soak in the reaction raw material solution for 20min, subject to complete immersion, after soaking, take it out and place it in a vacuum drying oven to dry at 80°C for 35min;

[0027] (3) Re-immersion of 3D foamed graphene into 3D MoS after drying 2 The reaction raw material solution, repeat the operation of step (2) 5 times to obtain ammonium tetrathiomolybdate / three-dimensional foamed graphene;

[0028] (4) placing the ammonium tetrathiomolybdate / three-dimensional foamed graphene obtained in step (3) in...

Embodiment 3

[0031] A three-dimensional foam MoS 2 / The preparation method of graphene, is characterized in that comprising the following steps:

[0032] (1) Three-dimensional MoS 2 Preparation of the reaction raw material solution: a mixed solution of ammonium tetrathiomolybdate and dimethylformamide was prepared as three-dimensional MoS 2 reaction raw material solution;

[0033] (2) Immerse the three-dimensional foamed graphene into the three-dimensional MoS prepared in step (1) 2 Soak in the reaction raw material solution for 18min, subject to complete immersion. After soaking, take it out and place it in a vacuum drying oven to dry at 75°C for 30min;

[0034] (3) Re-immersion of 3D foamed graphene into 3D MoS after drying 2 The reaction raw material solution, repeat the operation of step (2) 5 times to obtain ammonium tetrathiomolybdate / three-dimensional foamed graphene;

[0035] (4) placing the ammonium tetrathiomolybdate / three-dimensional foamed graphene obtained in step (3) in...

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PUM

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Abstract

The invention discloses a preparation method of three-dimensional foamed MoS2/graphene. With a mixed solution of ammonium tetrathiomolybdate and dimethyl formamide as a three-dimensional MoS2 reaction material solution, graphene is dipped and dyed and then is subjected to heat preservation in hydrogen and argon atmosphere of a tube furnace, so as to obtain the three-dimensional foamed MoS2/graphene. Compared with the traditional lithium ion battery anode composite material, the preparation method has obvious advantages that (a) the material loss in the preparation process is reduced, and the preparation method is easy to operate and industrially produce; and (b) the prepared three-dimensional foamed MoS2/graphene has the advantages of high specific capacity and high cycling stability.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a three-dimensional foam MoS 2 / The preparation method of graphene. Background technique [0002] With the rapid development of nanotechnology, the application of nanomaterials in the field of lithium-ion battery anodes has received extensive attention at home and abroad. Common negative electrode materials for lithium-ion batteries include carbon materials, oxides, nitrides, alloys, and salts. Generally, the batteries used in commercial use are mainly based on traditional graphite materials. The main graphite materials should be hexagonal, with a typical sandwich layered structure, and the layers are composed of sp 2 The covalent bonds formed by hybridization are combined with van der Waals forces between the layers. Covalent bonds have good electrical conductivity, the interlayer distance is 340pm, and it has good intercalation lithium storage capacity. Graphite, as a negati...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M4/583H01M4/1393H01M4/1397
CPCH01M4/1393H01M4/1397H01M4/362H01M4/5815H01M4/583H01M2004/027Y02E60/10
Inventor 蔡亚菱康健高琍玲张玉岁朱文浩
Owner JIANGSU XINGUANG ENVIRONMENTAL PROTECTION ENG
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