Composite electrode materials, preparation method thereof, and application thereof

A composite electrode and carbon material technology, applied in hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, battery electrodes, etc., can solve the problems of unfavorable internal active material utilization, large nickel hydroxide particle size, and poor product uniformity, and achieve Environmentally friendly after-treatment, no need for post-treatment, and easy-to-control conditions

Active Publication Date: 2017-11-17
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared nickel hydroxide has high purity, mild reaction conditions, simple process and easy operation, but the obtained fibrous nickel hydroxide has a large particle size, the fiber length is tens of microns, and the diameter is about 30nm, and the fibers are interwoven Large microspheres, poor uniformity of the product, is not conducive to the utilization of internal active substances, and shows poor energy storage performance

Method used

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  • Composite electrode materials, preparation method thereof, and application thereof
  • Composite electrode materials, preparation method thereof, and application thereof
  • Composite electrode materials, preparation method thereof, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Prepare 100mL of 1M nickel chloride solution and 100mL of 2M sodium hydroxide solution. With stirring at room temperature, drop the sodium hydroxide solution into the nickel chloride solution. Wash by centrifugation for three times, and dry overnight in an oven at 60°C to obtain nickel hydroxide;

[0055] Weigh 0.5 g of the prepared nickel hydroxide, mix it with ammonia water with a mass percentage concentration of 28%, and prepare a nickel-ammonia mixed solution, so that the mass concentration of the complex solution is 1 mg / mL;

[0056] Weigh 95 mg of activated carbon, add 5 mL of the prepared 1 mg / mL nickel-ammonia mixed solution, sonicate for 10 minutes, and then place it on a hot stage at 60 ° C until the ammonia water is completely volatilized to obtain a nickel hydroxide-activated carbon composite electrode material with a loading capacity of 5%. .

[0057] Its characterization results and electrochemical performance test data are attached Figure 1-5 shown.

...

Embodiment 2

[0064] Prepare 100mL of 1M cobalt nitrate solution and 100mL of 2M potassium hydroxide solution. Under stirring at room temperature, drop the potassium hydroxide solution into the cobalt nitrate solution, stir for 30 minutes after the addition is completed, and centrifugally wash the obtained product with deionized water Three times, dry overnight in an oven at 80°C to obtain cobalt hydroxide;

[0065] Weigh 0.5 g of the prepared cobalt hydroxide, mix it with ethylenediamine solution with a mass percentage concentration of 99.9%, and prepare a cobalt ethylenediamine complex solution, so that the mass concentration of the complex solution is 0.01 mg / mL;

[0066] Weigh 99.99 mg of carbon nanotubes, add 1 mL of the prepared 0.01 mg / mL cobalt ethylenediamine complex solution, sonicate for 10 minutes, then place on a hot stage at 100 ° C until the ethylenediamine is completely volatilized, and the loading capacity is obtained as 0.01% cobalt hydroxide-carbon nanotube composite elec...

Embodiment 3

[0069] Purchase commercial analytically pure manganese dioxide;

[0070] Weigh 0.5g of manganese dioxide, mix it with a 50% mass percent methylamine solution, and prepare a manganese methylamine complex mixed solution, so that the mass concentration of the complex solution is 10 mg / mL;

[0071] Weigh 200mg of graphene, add it to 80mL of the prepared 10mg / mL manganese methylamine complex solution, sonicate for 10min, then place on a hot stage at 60°C and heat until the methylamine solution is completely volatilized to obtain an oxide with a loading capacity of 80%. Manganese-graphene composite electrode materials.

[0072] The three-electrode electrochemical performance test was carried out on the manganese hydroxide-graphene composite electrode material with a loading capacity of 80% prepared in this example. The results showed that: at a scan rate of 5 mV / s, the mass specific capacity of the full electrode reached 190 F / g, and the activity The specific capacity of manganese ...

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Abstract

The present invention relates to composite electrode materials, a preparation method thereof, and an application thereof. The method comprises: metallic oxide and/or hydroxide solution through coordination solution are mixed with carbon materials, the metallic oxide and/or metal hydroxide are grown in situ at the surface of the carbon materials through evaporation of a ligand solution, and the composite electrode materials are obtained. The method provided by the invention is simple to operate, low in cost, green and environmentally friendly without postprocessing, and provides possibility for industrialization large-scale production of the electrode materials. The composite electrode materials prepared by the method are good in electric energy storage. For example, the 5% capacity nickelous hydroxide-active carbon composite electrode materials are prepared by the method, the full electrode quality specific capacity thereof can reach 294F/g, and the active substance specific capacity thereof can reach 4917F/g.

Description

technical field [0001] The invention belongs to the field of energy storage materials, and relates to a composite electrode material, its preparation method and application, in particular to a metal oxide and / or metal hydroxide-carbon material composite electrode material, its preparation method and its application in energy storage. applications in related fields. Background technique [0002] Energy is the material basis for human existence and development. Due to the gradual consumption of fossil fuels, human beings are facing a serious energy crisis. Therefore, people are actively exploring various new energy technologies and energy storage systems, thereby making portable electronic devices, composite With the rapid development of electric vehicles and large-scale power grids, people have a more urgent demand for energy storage devices with low cost, environmental friendliness, high energy density, and high power density. Electrochemistry, especially the development of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/46H01G11/32H01G11/36H01G11/40H01G11/86H01M4/583H01M4/48
CPCH01G11/32H01G11/36H01G11/40H01G11/46H01G11/86H01M4/362H01M4/48H01M4/583Y02E60/10
Inventor 王悦梁明会江鹏张先锋魏航李鑫刘永广
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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