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Electrode applied to electrochemical energy storage device and preparation method of electrode

An energy storage device, electrochemical technology, applied in the direction of battery electrodes, hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, etc., can solve the problem of low power and energy density, poor electrochemical cycle performance, and utilization of electrode active materials High capacity, easy to achieve repeatedly, and shorten the distance of ion penetration and transmission

Active Publication Date: 2014-12-24
HUBEI UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electrodes prepared in this way have low utilization rate of electrode active materials during the electrochemical cycle, poor electrochemical cycle performance, and low power and energy density.

Method used

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  • Electrode applied to electrochemical energy storage device and preparation method of electrode
  • Electrode applied to electrochemical energy storage device and preparation method of electrode
  • Electrode applied to electrochemical energy storage device and preparation method of electrode

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preparation example Construction

[0037] Please also refer to Figure 2-3 , the embodiment of the present invention further provides a method for preparing an electrode 100 applied to an electrochemical energy storage device, comprising the following steps:

[0038] S1, providing electrode active material precursors, precipitants and surfactants;

[0039] S2, uniformly mixing the electrode active material precursor, precipitant and surfactant in a solvent to form a mixed solution, wherein the molar ratio of the surfactant to the electrode active material precursor is 2:1 to 20:1 ;

[0040] S3, placing the current collector 10 in the mixed solution, and subjecting the mixed solution provided with the current collector 10 to a liquid phase reaction to obtain an electrode intermediate 100a, and

[0041] S4, ultrasonically processing the electrode intermediate 100a to obtain the electrode 100 .

[0042] In the above step S1, the electrode active material precursor is a raw material used to prepare the electrode...

Embodiment 1

[0056] Ni(OH) 2 Electrode preparation

[0057] The soluble divalent nickel salt, ammonia solution as a precipitant, and SDS and HMT as a surfactant are uniformly mixed to form a mixed solution. Wherein the divalent nickel salt is 0.1 mole, the SDS is 0.25 mole, and the HMT is 1 mole. In addition, the volume of ammonia water is 5ml, wherein the mass content of ammonia water in the ammonia solution is 28wt%. The mixed solution was placed in a reaction kettle, and a nickel mesh was placed in the reaction kettle and heated to 90°C, and kept for 4 hours to make Ni(OH) 2 Deposited on the surface of nickel mesh. The reactor was then cooled, and the nickel mesh was taken out and washed several times with deionized water and ethanol. Finally, the washed nickel mesh was ultrasonically treated in deionized water to obtain Ni(OH) 2 Electrode, wherein the power of ultrasonic treatment is 40kW.

Embodiment 2

[0059] This embodiment is basically the same as the above-mentioned embodiment 1, the difference is that the precursor of the electrode active material is a divalent Co salt, and finally the Co(OH) 2 .

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Abstract

The invention relates to an electrode applied to an electrochemical energy storage device. The electrode comprises a current collector and an electrode active material structural body arranged on the current collector, wherein the electrode active material structural body comprises a porous buffering layer and a nano-sheet array; the porous buffering layer is arranged on the surface of the current collector; the nano-sheet array is vertically arranged on the surface of the porous buffering layer and comprises multiple nano sheets; each nano sheet is of a porous structure, and at least one nano sheet comprises multiple single nano layers.

Description

technical field [0001] The invention relates to an electrode applied to an electrochemical energy storage device and a preparation method thereof. Background technique [0002] The depletion of fossil energy and global warming have made people pay more and more attention to the use of renewable energy, and vigorously developing clean energy vehicles has become an irreversible trend. Efficient energy storage and conversion technology is one of the key technologies for the utilization of renewable energy and the development of electric vehicles. Supercapacitors (supercapacitors), also known as electrochemical capacitors (electrochemical capacitors), is a new type of energy storage device whose performance is between physical capacitors and secondary batteries, and has the characteristics of high specific power of physical capacitors and high specific energy of batteries. . Due to the characteristics of high power density, long cycle life, instant high current fast charge and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/52H01M4/131H01M4/1391H01G11/26H01G11/24H01G11/86
CPCY02E60/13H01G11/26H01G11/24H01G11/28H01G11/86
Inventor 贾志勇
Owner HUBEI UNIV OF ARTS & SCI
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