Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for producing expanded graphite/metal oxide composite

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, high specific capacity, and low internal resistance

Inactive Publication Date: 2009-09-02
HARBIN ENG UNIV
View PDF0 Cites 7 Cited by
  • 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

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

[0025] 0.5g of expanded graphite (expansion volume 200mL / g) and 9.5g of nano-nickel oxide (average particle size 5nm) were used in a planetary high-energy ball mill with steel balls and a spherical tank at a rotation speed of 100rpm and a ball-to-powder ratio of 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] 5g of expanded graphite (expansion volume 600mL / g) and 5g of nano-manganese oxide (average particle size 1000nm) were ball milled in a planetary high-energy ball mill using steel balls and spherical pots at a rotation speed of 250rpm and a ball-to-powder ratio of 30:1. 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] 3g of expanded graphite (expansion volume 400mL / g) and 7g of nano-manganese oxide (average particle size 50nm) were ball milled in a planetary high-energy ball mill using steel balls and a spherical tank at a rotation speed of 250rpm and a ball-to-powder ratio of 10:1. 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.

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
particle diameteraaaaaaaaaa
particle sizeaaaaaaaaaa
purityaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for producing expanded graphite / metal oxide composite used in a super electrode capacitor. The raw materials including 5-99 percent of expanded graphite and 1-95 percent of transition metal oxide by weight percentage are prepared and then processed according to the following steps: (a) the transition metal oxide nanometer particles are uniformly dispersed into water solution through surface active agents to prepare the stable dispersion liquid of inorganic nanometer particles, and the weight ratio of the nanometer particles is 1-70 percent; and (b) the expanded graphite is immersed into the stable dispersion liquid of the inorganic nanometer particles prepared in the step (a) to be stood for 10 to 24 hours at the indoor temperature and then is dried for 4 to 20 hours at 100-200 DEG C to obtain the expanded graphite / metal oxide composite. The method has simple production technology, low cost and has high industrial application value.

Description

(1) Technical field [0001] The invention relates to the field of manufacturing capacitor electrode materials, in particular to a method for preparing expanded graphite / metal oxide composite materials used as super capacitor electrode materials. (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...

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): H01G9/042H01G9/058H01M4/36H01M4/04H01M14/00H01B1/00H01B1/04H01B1/08H01B13/00H01G11/38H01G11/46H01G11/86
CPCY02E60/12Y02E60/10
Inventor 范壮军魏彤闫俊郄忠伟王珊珊
Owner HARBIN ENG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com