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Rod-like nickel hydroxide electrode material, preparation method and prepared supercapacitor

A supercapacitor, nickel hydroxide technology, used in nickel oxide/nickel hydroxide, hybrid/electric double layer capacitor manufacturing, hybrid capacitor electrodes, etc., can solve the problem of rate performance, measured specific capacity and cycle stability is not very ideal, The problems of easy escape of intercalated anions and low electronic conductivity have achieved the effect of solving practical application problems, easy industrial scale-up and simple preparation process.

Active Publication Date: 2019-09-06
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the intercalation anion is easy to escape during the charge and discharge process, which leads to its structural instability.
In addition, the electronic conductivity of nickel hydroxide itself is also low, which leads to its low utilization rate. The rate performance, measured specific capacity and cycle stability of nickel hydroxide electrode materials reported so far are not very ideal.

Method used

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  • Rod-like nickel hydroxide electrode material, preparation method and prepared supercapacitor
  • Rod-like nickel hydroxide electrode material, preparation method and prepared supercapacitor
  • Rod-like nickel hydroxide electrode material, preparation method and prepared supercapacitor

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Embodiment 1

[0040] This embodiment provides a method for preparing a rod-shaped nickel hydroxide electrode material, and the preparation steps are as follows:

[0041] (1) Weigh 5 mmol of nickel nitrate, dissolve in 20 mL of distilled water, and place in 80 o Carry out magnetic stirring in the oil bath device of C;

[0042] (2) take by weighing the sodium chloride of 16 g, under magnetic stirring effect, join above-mentioned nickel nitrate and dissolve in;

[0043] (3) Add 50 mL of ammonia water dropwise to the above-mentioned nickel nitrate aqueous solution under magnetic stirring, then use a constant temperature oil bath, and evaporate the above-mentioned solution to a viscous state by solvent evaporation method to end the reaction;

[0044] (4) Transfer the above-mentioned viscous product to a centrifuge tube with distilled water and ethanol, and repeatedly centrifuge and wash to remove excess ammonia and sodium chloride; then dry and collect the precipitate to obtain the target produ...

Embodiment 2

[0047] This embodiment provides a method for preparing a rod-shaped nickel hydroxide electrode material, and the preparation steps are as follows:

[0048] (1) Weigh 2 mmol of nickel nitrate, dissolve in 30 mL of distilled water, and place in 60 o Carry out magnetic stirring in the oil bath device of C;

[0049] (2) take by weighing the sodium chloride of 12 g, under magnetic stirring effect, join above-mentioned nickel nitrate and dissolve in;

[0050] (3) Add 40 mL of ammonia water dropwise to the above-mentioned nickel nitrate aqueous solution under magnetic stirring, and then use a constant temperature oil bath to evaporate the above-mentioned solution to a viscous state by solvent evaporation method to end the reaction;

[0051] (4) Transfer the above-mentioned viscous product to a centrifuge tube with distilled water and ethanol, and repeatedly centrifuge and wash to remove excess ammonia and sodium chloride; then dry and collect the precipitate to obtain the target pro...

Embodiment 3

[0054] This embodiment provides a method for preparing a rod-shaped nickel hydroxide electrode material, and the preparation steps are as follows:

[0055] (1) Weigh 8 mmol of nickel nitrate, dissolve in 40 mL of distilled water, and place in 80 o Carry out magnetic stirring in the oil bath device of C;

[0056] (2) take by weighing the sodium chloride of 8 g, under magnetic stirring effect, join above-mentioned nickel nitrate and dissolve in;

[0057] (3) Add 30 mL of ammonia water dropwise to the above-mentioned nickel nitrate aqueous solution under magnetic stirring, and then use a constant temperature oil bath to evaporate the above-mentioned solution to a viscous state by solvent evaporation method to end the reaction;

[0058] (4) Transfer the above-mentioned viscous product to a centrifuge tube with distilled water and ethanol, and repeatedly centrifuge and wash to remove excess ammonia and sodium chloride; then dry and collect the precipitate to obtain the target prod...

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Abstract

The invention provides a rod-like nickel hydroxide electrode material, a preparation method and a prepared supercapacitor. Nickel hydroxide with high theoretical specific capacity is taken as a research object, nickel nitrate is selected as a nickel source, ammonia water is selected as a precipitant and complexing agent, distilled water is selected as a solvent, sodium chloride is selected as a morphology regulator, and a nickel hydroxide electrode material with a one-dimensional rod-like structure is successfully prepared by utilizing a salt effect. Further, the nickel hydroxide electrode material is used as a positive electrode material, activated carbon is used as a negative electrode material, an asymmetric supercapacitor is assembled, and the electrochemical performance of the asymmetric supercapacitor is tested. The invention provides a preparation method of the rod-like structure nickel hydroxide, the method is simple in process, low in cost, environment-friendly, high in efficiency and suitable for industrial amplification production. The supercapacitor assembled by the rod-like nickel hydroxide shows good specific capacity, rate performance and cycling stability, and a wide application prospect is achieved.

Description

technical field [0001] The invention relates to the field of supercapacitor electrode materials, in particular to a rod-shaped nickel hydroxide electrode material, a preparation method and a supercapacitor prepared therefrom. Background technique [0002] Fossil fuels promote the rapid development of industrialization, but the ensuing environmental pollution and its own non-renewable characteristics force us to look for clean and sustainable energy. The intermittent nature of today's clean, sustainable energy sources makes them unsustainable. Therefore, the development of efficient energy storage devices is the key to solving the energy crisis and environmental pollution. Supercapacitors combine the advantages of traditional capacitors and batteries, and are expected to produce energy storage devices with high power density, high energy density and long cycle life. Electrode materials are the core components of supercapacitors, so it is of long-term strategic significance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/24H01G11/84H01G11/86C01G53/04B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G53/04H01G11/24H01G11/30H01G11/84H01G11/86Y02E60/13
Inventor 米立伟卫武涛王静叶婉玉翟淑宁崔世忠陈卫华
Owner ZHONGYUAN ENGINEERING COLLEGE
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