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Method for preparing porous carbon/nano metal oxide composite material

A nano-metal and composite material technology, applied in cable/conductor manufacturing, electrode manufacturing, conductive coatings, etc., can solve problems such as uneven dispersion and lower specific capacity of materials

Inactive Publication Date: 2007-09-19
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the metal oxides prepared in this way are unevenly dispersed in the carbon matrix, and on the other hand, they tend to aggregate into large particles on the carbon surface during heat treatment, which will reduce the specific capacity of the material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (A) Preparation of porous carbon / nano-metal oxides

[0021] The mixture (30wt%) of resorcinol / formaldehyde (molar ratio 1:2) is mixed with the sol (average particle diameter 5nm, 1wt%) of nanometer nickel hydroxide by weight ratio 1:1, by adding 1N hydroxide The pH of the mixture was adjusted to 8 with aqueous sodium solution and 1N aqueous nitric acid solution. The mixed solution was aged at room temperature for 10 days to form a resorcinol-formaldehyde-gel / nano-nickel hydroxide composite material. The composite material was heated to 850°C under a nitrogen atmosphere and kept for 1 hour for carbonization, and at the same time, the nano-nickel hydroxide was decomposed into nano-nickel oxide, thereby preparing a porous carbon / nano-nickel oxide composite material, and the prepared material was analyzed by thermogravimetry The content of nano-nickel oxide measured by the method is listed in Table 1.

[0022] (B) Electrode preparation and performance testing

[0023] Mi...

Embodiment 2

[0025]The mixture (50wt%) of resorcinol / formaldehyde (2: 1 in molar ratio) and the sol (average particle diameter 100nm, 1wt%) of the stable nano-cobalt carbonate of surfactant with sodium dodecylbenzenesulfonate Mix in a weight ratio of 1:10, and adjust the pH of the mixture to 5 by adding a 1N aqueous solution of nitric acid. The mixture was concentrated and aged at 100°C for 2 days to form a resorcinol-formaldehyde-gel / nano-cobalt carbonate composite. The composite material was heated to 800°C under a nitrogen atmosphere and kept for 1 hour for carbonization, and at the same time, the nano-cobalt carbonate was decomposed into nano-cobalt oxide, thereby preparing a porous carbon / nano-cobalt oxide composite material, and the prepared material was analyzed by thermogravimetric method The measured content of nano-cobalt oxide is listed in Table 1. The electrode preparation and testing methods are the same as in Example 1, and the measured results are listed in Table 1.

Embodiment 3

[0027] The mixture (30wt%) of the mixture (30wt%) of phenol / formaldehyde (5:1) and the sol (average particle size 1000nm, 1wt%) of nanometer manganese hydroxide are mixed by weight 1:20, by adding the aqueous solution of 1N sodium carbonate, mix The pH value was adjusted to 8. The mixture was concentrated and aged at 85°C for three days to form a phenol-formaldehyde-gel / nano-manganese hydroxide composite. The composite material was heated to 900°C under a nitrogen atmosphere and kept for 1 hour for carbonization, and at the same time, the nano-manganese hydroxide was decomposed into nano-manganese oxide, thereby preparing a porous carbon / nano-manganese oxide composite material. The nano-manganese oxide content measured by the method is listed in Table 1, and the preparation and testing methods of the electrode are the same as in Example 1, and the measured results are listed in Table 1.

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Abstract

The invention relates to a method for preparing a lacunaris carbon / nanometer oxide composite material used in an ultra capacitor electrode. The prepared material is capable of evenly dispersing a nanometer oxide into a lacunaris carbon substrate. When the ultra capacitor electrode is prepared by the material, with a combination of a double-electric-layer capacitor and a metal oxide pseudocapacitance, the electrode can has a higher unit capacitor and a carbon framework can provide a favorable conductive passage for nanometer metal oxide particles dipersed in the carbon framework to reduce an equivalent internal resistance of the capacitor, thereby the capacitor has a high power and power density.

Description

(1) Technical field [0001] The invention relates to the field of chemical material preparation, in particular to a method for preparing a porous carbon / nano metal oxide composite 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 supercapacitor electrode materials mainly focuses on activated carbon, carbon nanotubes, transition metal oxides and organic conductive polymers. The carbon electrode material is cheap and the preparation process is simple, but the speci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/008H01G9/042H01G13/00H01M4/04H01B13/00C09D5/24
CPCY02E60/13
Inventor 魏彤范壮军
Owner HARBIN ENG UNIV
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