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Molybdenum disulfide nano-sheet/graphene composite material and preparation method thereof, and lithium ion capacitor and preparation method thereof

A molybdenum disulfide, composite material technology, applied in the field of electrochemistry, can solve the problems of low volume, difficult to form a high volume specific energy capacitor, etc., and achieve excellent mechanical properties, high power density and volume specific capacitance, and good electrical conductivity. Effect

Inactive Publication Date: 2016-12-21
江苏超电新能源科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the widespread use of activated carbon as the active material of the positive electrode, the density of activated carbon is only 0.6g / cm 3 , the volume specific capacitance is low, it is difficult to form a good high volume specific energy capacitor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A molybdenum disulfide nanosheet / graphene composite material comprises the following raw materials in weight percentage: 20% of graphene oxide and 80% of molybdenum disulfide nanosheet.

[0023] The molybdenum disulfide nanosheet / graphene composite material according to Example 1 has good electrical conductivity, excellent mechanical properties, higher power density and volume specific capacitance, and longer service life, and can be used as a lithium ion capacitor Positive active material.

[0024] The preparation method of above-mentioned molybdenum disulfide nanosheet / graphene composite material, comprises the following steps:

[0025] Graphene oxide and molybdenum disulfide nanosheets were mixed at a mass ratio of 1:4, ball milled for 5 hours (rotational speed was 1500r / min), and placed in a muffle furnace protected by inert gas argon for 20 hours at 900°C to obtain two Molybdenum sulfide nanosheets / graphene composites. Wherein, the graphene oxide is prepared by r...

Embodiment 2

[0031] A molybdenum disulfide nanosheet / graphene composite material comprises the following raw materials in weight percentage: 40% of graphene oxide and 60% of molybdenum disulfide nanosheet.

[0032] The molybdenum disulfide nanosheet / graphene composite material according to Embodiment 2 has good electrical conductivity, excellent mechanical properties, higher power density and volume specific capacitance, and longer service life, and can be used as a lithium ion capacitor positive active material.

[0033] The preparation method of above-mentioned molybdenum disulfide nanosheet / graphene composite material, comprises the following steps:

[0034] Mix graphene oxide and molybdenum disulfide nanosheets at a mass ratio of 2:3, ball mill for 1 hour (rotational speed of 1500r / min), and place them in a muffle furnace protected by inert gas nitrogen for 10 hours at 800°C to obtain disulfide Molybdenum nanosheets / graphene composites. Wherein, the graphene oxide is prepared by reac...

Embodiment 3

[0040] A molybdenum disulfide nanosheet / graphene composite material comprises the following raw materials in weight percentage: 30% of graphene oxide and 70% of molybdenum disulfide nanosheet.

[0041] The molybdenum disulfide nanosheet / graphene composite material according to Example 3 has good electrical conductivity, excellent mechanical properties, high power density and volume specific capacitance, and long service life, and can be used as a lithium ion capacitor Positive active material.

[0042] The preparation method of above-mentioned molybdenum disulfide nanosheet / graphene composite material, comprises the following steps:

[0043] Mix graphene oxide and molybdenum disulfide nanosheets at a mass ratio of 3:7, ball mill for 10 hours (300r / min), and place in a muffle furnace protected by a mixture of inert gases helium and neon at 900°C after ball milling After 20 hours of reaction, the molybdenum disulfide nanosheet / graphene composite material was obtained. Wherein,...

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Abstract

The present invention relates to a molybdenum disulfide nano-sheet / graphene composite material and a preparation method thereof, and a lithium ion capacitor and a preparation method thereof. The molybdenum disulfide nano-sheet / graphene composite material comprises the following raw materials by weight: 1-40% of graphene oxide and 60-99% of molybdenum disulfide nano-sheets. According to the present invention, the molybdenum disulfide nano-sheet / graphene composite material has advantages of good electrical conductivity, excellent mechanical performance, high power density, high volume ratio capacitance and long service life, and can be used as the positive electrode active material of the lithium ion capacitor.

Description

technical field [0001] The invention relates to the field of electrochemistry, and mainly relates to a molybdenum disulfide nanosheet / graphene composite material and a preparation method thereof, a lithium ion capacitor and a preparation method thereof. Background technique [0002] Lithium-ion capacitors adopt the principle of electric double-layer capacitors in the design of the positive electrode, and at the same time add lithium ions to the negative electrode, thereby increasing the energy density of the capacitor. Japan's Asahi Kasei Electronics Company and FDK Company have both developed capacitors using lithium oxide in the electrolyte, but they have not been commercialized. The turning point occurred in 2005, when Fuji Heavy Industries disclosed the manufacturing technology of lithium-ion capacitors: the negative electrode of the capacitor uses polyacene-based materials, and a large amount of lithium ions are doped in it, and the positive electrode material of the ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/13H01M4/139H01M4/1397
CPCH01M4/13H01M4/139H01M4/1397H01M4/362Y02E60/10
Inventor 王云峰姚晓青徐勇高洁
Owner 江苏超电新能源科技发展有限公司