Method for preparing needle-like nickel hydroxide/carbon cloth flexible self-supporting electrode by using dual regulators

A self-supporting electrode, nickel hydroxide technology, used in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing and other directions, can solve the problem of high interface resistance, metal hydroxide rate performance, poor cycle stability, not suitable for flexible devices, etc. problem, to achieve the effect of low cost, simple method and simple operation

Active Publication Date: 2022-03-25
HEILONGJIANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the metal hydroxide obtained by the existing preparation method is used as an electrode material with poor rate performance and cycle stability, and the interface resistance between the powder electrode material and the base material is large and is not suitable for flexible devices. A method for preparing needle-shaped nickel hydroxide / carbon cloth flexible self-supporting electrodes with dual regulators is provided

Method used

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  • Method for preparing needle-like nickel hydroxide/carbon cloth flexible self-supporting electrode by using dual regulators
  • Method for preparing needle-like nickel hydroxide/carbon cloth flexible self-supporting electrode by using dual regulators
  • Method for preparing needle-like nickel hydroxide/carbon cloth flexible self-supporting electrode by using dual regulators

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specific Embodiment approach 1

[0025] Embodiment 1: In this embodiment, a method for preparing needle-shaped nickel hydroxide / carbon cloth flexible self-supporting electrodes with dual regulators.

[0026] 1. Carbon cloth treatment: Cut the carbon cloth into 1cm×3cm carbon cloth pieces, and then wash and dry them with hydrochloric acid, acetone, deionized water and ethanol in sequence;

[0027] Two, nickel nitrate hexahydrate is dissolved in deionized water to obtain nickel nitrate solution;

[0028] 3. Dissolving ammonium fluoride and urea in deionized water in sequence to obtain a mixed solution;

[0029] Four, 1., the nickel nitrate solution that step 2 is obtained is stirred for a certain hour at a certain stirring speed to obtain a uniform reaction solution I;

[0030] ②, the regulator mixed solution obtained in step 3 is stirred at a certain stirring speed for a certain period of time to obtain the reaction solution II;

[0031] ③. Mix the above I and II solutions, and stir and react at a certain st...

specific Embodiment approach 2

[0037] Embodiment 2: This embodiment differs from Embodiment 1 in that step 1 carbon cloth is ultrasonically treated in 2-5M hydrochloric acid for 30 minutes to obtain acid pretreated carbon cloth with different concentrations. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0038] Embodiment 3: This embodiment differs from Embodiment 1 in that step 2 disperses nickel nitrate hexahydrate into 36 mL of deionized water with a molar mass of 1-5 mmol to obtain nickel nitrate solutions with different concentrations. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention relates to a method for preparing a needle-like nickel hydroxide/carbon cloth flexible self-supporting electrode by using a dual-conditioning agent, and aims to solve the problems of low capacitive performance and stability, poor contact between an active material and an electrode substrate and the like when nickel hydroxide prepared by an existing method is used as an electrode material. The invention provides a method for preparing a needle-like nickel hydroxide/carbon cloth flexible self-supporting electrode by using a dual-conditioning agent. The method has the characteristics that the preparation method is simple and convenient, the electrode flexibility is good, and a binder is not needed. The preparation method comprises the following steps: 1, treating carbon cloth to obtain pretreated carbon cloth with a certain size; 2, dispersing a nickel source into a solvent to obtain a uniform nickel source solution; 3, dispersing regulated ammonium fluoride and urea into a solvent to obtain a mixed dual-regulator solution; 4, stirring and mixing the solution obtained in the step 1 for a certain time, adding the carbon cloth obtained in the step 1 to obtain a mixed solution, and transferring the mixed solution into a reaction kettle for hydrothermal treatment; and 5, carrying out ultrasonic treatment, washing and drying on the carbon cloth obtained in the step 4 to obtain the nickel hydroxide/carbon cloth flexible self-supporting electrode.

Description

technical field [0001] The invention relates to a preparation method and application of a method for preparing needle-shaped nickel hydroxide / carbon cloth flexible self-supporting electrodes with double regulators. Background technique [0002] With the continuous improvement of people's life and health needs and the continuous advancement of electronic technology, the development of flexible electronic technology and flexible electrodes is becoming increasingly important. As a new type of energy storage device, supercapacitor has a series of advantages such as fast charge and discharge rate, high power performance, and long cycle life. It has been used in many fields such as wearable devices and implanted devices. Flexible electrode materials are the core of supercapacitors, and their type and microstructure determine the performance of capacitors. Compared with traditional supercapacitor devices, flexible supercapacitors have the characteristics of softness and bendabilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/26H01G11/30H01G11/32
CPCH01G11/86H01G11/26H01G11/32H01G11/30Y02E60/13
Inventor 张晓萌
Owner HEILONGJIANG INST OF TECH
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