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Preparation method based on nano-porous independent electrode

An independent electrode and nanoporous technology, which is applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, hybrid capacitor collectors, etc., can solve the problem of large volume changes of transition metal oxides, harsh operating conditions of fine control, and capacity decay speed Faster and other problems, to achieve the effect of increasing the rapid mass transfer process, enriching the effective redox reaction active sites, and accelerating the response kinetics

Inactive Publication Date: 2021-03-26
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it should be noted that the methods of preparing these materials often involve difficulties such as high temperature, fine control, and harsh operating conditions. Moreover, due to the large volume change and low conductivity of transition metal oxides, their capacity decays quickly and their cycle stability is poor. , which further hinders its practical application

Method used

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Examples

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Embodiment 1

[0020] A method for preparing a nanoporous independent electrode, comprising the following steps:

[0021] (1) The metal particles of Al, Cu and Fe with a molar ratio of 8:9:3 and a purity of more than 99.99% are respectively placed in dilute Hcl solution for ultrasonic pickling to remove the oxide layer on the surface of the metal particles, and then put Dry in a vacuum drying oven to remove the oxide layer on the surface of the metal particles. In order not to corrode the metal particles during the pickling process and to effectively remove the oxide layer on the surface, as a preferred solution, dilute Hcl solution is selected for the pickling process. concentration of 0.001 M L-1, ultrasonic time of 30 min, and then vacuum drying, the conditions in the vacuum drying step are: vacuum degree of -10 Mpa, temperature of 70 ° C, drying time of 12 h, this condition does not affect the metal Oxidation occurs on the particle surface.

[0022] (2) Before smelting, put the metal Ti...

Embodiment 2

[0030] A method for preparing a nanoporous independent electrode, comprising the following steps:

[0031] (1) The metal particles of Al, Cu and Fe with a molar ratio of 8:9:3 and a purity of more than 99.99% are respectively placed in dilute Hcl solution for ultrasonic pickling to remove the oxide layer on the surface of the metal particles, and then put Dry in a vacuum drying oven to remove the oxide layer on the surface of the metal particles. In order not to corrode the metal particles during the pickling process and to effectively remove the oxide layer on the surface, as a preferred solution, dilute Hcl solution is selected for the pickling process. concentration of 0.001 M L-1, ultrasonic time of 30 min, and then vacuum drying, the conditions in the vacuum drying step are: vacuum degree of -10 Mpa, temperature of 70 ° C, drying time of 12 h, this condition does not affect the metal Oxidation occurs on the particle surface.

[0032] (2) Before smelting, put the metal Ti...

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Abstract

The invention discloses a preparation method based on a nano-porous independent electrode. The preparation method comprises the following steps: (1), respectively putting metal particles of Al, Cu andFe with the molar ratio of 8: 9: 3 or 2: 2: 1 and the purity of over 99.99% into a dilute Hcl solution for acid pickling; (2), before smelting, putting a metal Ti ingot in a water-cooled copper crucible, putting a particle mixture of Al, Cu and Fe in another crucible, smelting the crucible containing the metal Ti ingot, and then carrying out magnetic stirring vacuum smelting on metal particles; (3), cutting the alloy ingot into blocks through linear cutting, removing surface oil stains, and performing drying; (4), putting the dried alloy block into a 70 DEG C constant-temperature Hcl corrosive liquid, and carrying out chemical dealloying for 12 hours; and (5), performing cleaning and drying. According to the preparation method provided by the invention, the rapid mass transfer process ofions and electrons is added, the response kinetics is accelerated, and the defect of poor conductivity of the metal oxide is overcome. And the area specific capacitance of the electrode material is increased to a great extent, and the controllability is relatively good.

Description

technical field [0001] The invention relates to a method for preparing an independent electrode without a binder by a dealloying strategy, in particular to a method for preparing a double metal oxide electrode, which belongs to the field of supercapacitor electrode materials. Background technique [0002] In today's energy storage field, the demand for energy storage devices with both high energy and high power density is increasing, which promotes the development of emerging energy storage systems represented by capacitors. At present, the development of supercapacitors is still restricted by the defects of low energy density, complicated preparation process and poor cycle stability. Therefore, it is urgent to develop a new type of electrode material with high energy density, easy structure regulation, stable structure and long cycle life. [0003] Transition metal oxides have been considered as promising electrode materials due to their high theoretical specific capacitan...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/46H01G11/26H01G11/68H01G11/70
CPCH01G11/86H01G11/46H01G11/26H01G11/68H01G11/70
Inventor 张嫚隋艳伟张德文戚继球委福祥任耀剑肖彬孟庆昆孙智
Owner CHINA UNIV OF MINING & TECH
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