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An electrochemical capacitor electrode material and its preparing method

A capacitor electrode and electrochemical technology, which is applied in the field of electrochemical capacitor electrode materials and its preparation, can solve the problems of low effective specific surface area, limited power density and energy density of electrochemical capacitors, unfavorable ion transport, etc.

Inactive Publication Date: 2009-08-26
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the electrode materials of electrochemical capacitors mostly use activated carbon with high specific surface area, but the pores of activated carbon are micropores at the molecular level, which is not conducive to ion transmission, and its effective specific surface area is relatively low, which affects the further improvement of power density; at the same time, activated carbon electrode materials pass through The principle of electric double layer stores electric energy, and the energy density is much lower than the energy storage method of quasi-Faraday electrochemical reaction
Thus limiting the improvement of the power density and energy density of electrochemical capacitors

Method used

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  • An electrochemical capacitor electrode material and its preparing method
  • An electrochemical capacitor electrode material and its preparing method
  • An electrochemical capacitor electrode material and its preparing method

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Nickel nitrate, urea, P123, and water are mixed and dissolved completely according to the mass ratio of 1:2:3:10, and then the mixture is hydrolyzed under airtight conditions at 200°C, and the nickel salt is hydrolyzed to form its hydroxide precipitate under the action of a weak base, and cooled to After filtering and drying the reaction product at room temperature, heat treatment at 100°C for 1.5 hours, the nickel oxide with mesoporous structure can be obtained, the pore diameter is 4nm, and the specific surface area is 260m 2 / g. The XRD results of samples obtained at different temperatures are attached figure 1 , the shape observation is as attached figure 2 , adsorption curve and pore size distribution, using it as the electrode material, 6MKOH as the electrolyte, and then assembled into an electrochemical capacitor, the specific capacity can reach 120F / g.

Embodiment 2

[0020] Nickel nitrate, urea, P123, and water are mixed and dissolved completely according to the mass ratio of 1:2:3:10, and then the mixture is hydrolyzed under airtight conditions at 200°C, and the nickel salt is hydrolyzed to form its hydroxide precipitate under the action of a weak base, and cooled to After filtering and drying the reaction product at room temperature, heat treatment at 250°C for 5 hours to obtain nickel oxide with mesoporous structure, the pore diameter is 6nm, and the specific surface area is 190m 2 / g. Mesoporous nickel oxide + activated carbon (BET specific surface area is 2000m 2 / g) is the active material, which is evenly dispersed, and the mass ratio of the two is 1:1 to obtain a composite capacitor electrode material, using 6M KOH as the electrolyte, and then assembled into an electrochemical capacitor, the specific capacity can reach 290F / g.

Embodiment 3

[0022] Cobalt nitrate, urea, P123 and water are mixed and dissolved completely according to the mass ratio of 1:5:1:20, and then the mixture is hydrolyzed under airtight conditions at 100°C, and the nickel salt is hydrolyzed to form its hydroxide precipitate under the action of a weak base, and cooled to After filtering and drying the reaction product at room temperature, heat treatment at 450°C for 7 hours to obtain mesoporous cobalt oxide with a pore diameter of 8nm and a specific surface area of ​​245m 2 / g. Using it as the electrode material, 6M KOH as the electrolyte, and then assembled into an electrochemical capacitor, the specific capacity can reach 180F / g.

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Abstract

This invention relates to electrochemical capacitor electrode materials and process method, wherein, the compound materials comprises nickel or cobalt salt or other transmission compound, deposition agent, hole process agent, water with quality proportion as 1:1-20: 0.1-5:1-100; Through water solution to combine original deposition and self combination method to directly grow hole oxidation materials to get capacitor electrode materials; the materials pass mixture hydrolysis, deposition agent under 100 to 300 degrees to make transmission metal icon to form hydroxide for cooling and drying reaction product to process middle hole structure oxidation with hole radium as 5 to 10 nm and surface area as 100 to 300 m2 / g.

Description

technical field [0001] The invention relates to the improvement technology of electrochemical capacitor electrode materials, and in particular provides a novel electrochemical capacitor electrode material and a preparation method thereof. Background technique [0002] With the massive use of mineral energy by human beings, mineral energy reserves are becoming increasingly scarce, and environmental pollution is becoming more and more serious. There is an urgent need for a clean and renewable energy source. Electrochemical capacitors have attracted great attention as an energy storage element between traditional capacitors with microfarad or picofarad capacity and high energy density batteries, which can provide large energy density and power density, It can be used as a non-polluting small backup power supply for a variety of electrical equipment, and it is also expected to play a huge role in electric vehicles, backup power supplies and energy storage power supplies due to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/042H01G13/00B01J19/00C08J9/00
CPCY02E60/13
Inventor 成会明李峰王大伟逯高清
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI