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Expansion graphite/metallic oxide composite material and its manufacture method

A technology of expanded graphite and composite materials, applied in the direction of oxide conductors, conductive materials, conductive materials, etc., can solve the problems of excessive material resistance, etc., and achieve the effects of simple preparation process, strong industrial application value, and high specific capacity

Inactive Publication Date: 2007-10-24
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, metal oxide electrode materials are mainly prepared by electrochemical method, thermal decomposition method, or sol-gel method, but the metal oxide electrode materials prepared by the above methods often have the problem of excessive material resistance when used in supercapacitors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] With 0.5g expanded graphite (expansion volume 200mL / g) and 9.5g nano-nickel oxide (average particle diameter 5nm), in planetary high-energy ball mill, adopt steel grinding ball and spherical tank with rotation number 100rpm, ball-to-powder ratio 10:1 , Ball milling for 40 hours. Take it out and dry it at 100°C to make a polarized electrode for electrochemical performance test. The results are listed in Table 1.

Embodiment 2

[0027] With 5g expanded graphite (expansion volume 600mL / g) and 5g nano-manganese oxide (average particle diameter 1000nm), adopt steel grinding ball and ball tank with rotation number 250rpm, ball-to-powder ratio 30: 1, ball mill in planetary high-energy ball mill 5 hours. Take it out and dry it at 100°C to make a polarized electrode for electrochemical performance test. The results are listed in Table 1.

Embodiment 3

[0029] With 3g expanded graphite (expansion volume 400mL / g) and 7g nano-manganese oxide (average particle diameter 50nm), in the planetary high-energy ball mill, adopt steel ball and spherical pot with revolution 250rpm, ball-to-powder ratio 10: 1, ball mill 10 hours. Take it out and dry it at 100°C to make a polarized electrode for electrochemical performance test. The results are listed in Table 1.

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Abstract

The provided composite material for super capacitor comprises: 5-95wt% expanded graphite, and 1-95wt% metal oxide. The preparation method comprises: high-energy grinding, sol dipping, or chemical deposition (CVD). This invention also introduces lower internal resistance, and needs low cost.

Description

(1) Technical field [0001] The invention relates to the field of capacitor electrode material production, in particular to an expanded graphite / metal oxide composite material used as a supercapacitor electrode material. (2) Background technology [0002] Supercapacitor is a new type of energy storage element. Due to its advantages of fast storage and release of energy, it can be used as a backup power supply for electronic systems such as computers, flash and ignition devices in industrial equipment, high-power microwave and laser weapons and electric There are also broad application prospects in the hybrid power supply of automobiles. The structural properties of electrode materials play a decisive role in the performance of supercapacitors. At present, the research on electrode materials for supercapacitors mainly focuses on activated carbon, carbon nanotubes, and transition metal oxides. The carbon electrode material is cheap and the preparation process is simple, but t...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01M4/36H01M4/04H01M14/00H01B1/00H01B1/04H01B1/08H01B13/00
CPCY02E60/13Y02E60/10
Inventor 范壮军魏彤闫俊郄忠伟王珊珊
Owner HARBIN ENG UNIV
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