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Sheet-like calcium-doped nickel hydroxide electrode material, manufacturing method thereof and application thereof in preparation of super capacitor

A technology of nickel hydroxide and electrode materials, which is applied in the manufacture of hybrid/electric double-layer capacitors and electrodes of hybrid capacitors, can solve the problems of poor cycle life, long difference, and high cost of capacitance performance, and achieve low cost and high energy storage performance. Excellent, simple operation effect

Inactive Publication Date: 2017-07-11
HUANGGANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above analysis shows that the capacitive performance, especially the cycle life, of the doped functionalized nickel hydroxide reported so far is still relatively poor, and it is still far from the actual application.
In addition, the currently reported methods for synthesizing nickel hydroxide have low efficiency, high cost, and environmental protection defects. Most of the reported synthetic methods rely on additional heat sources and alkali sources, such as the patent of Li Hongfang (application number: 200810071347 .X) reported the use of microwaves as a heat source and urea as an alkali source to synthesize nickel hydroxide, He Yushi’s patent (application number: 200510027345.7) reported the use of hydrothermal heat as a heat source and urea as an alkali source to synthesize nickel hydroxide
Combined with the above analysis, it is still a challenge to obtain doped nickel hydroxide materials with high cycle life with a simple and effective method that does not rely on additional heat and alkali sources

Method used

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  • Sheet-like calcium-doped nickel hydroxide electrode material, manufacturing method thereof and application thereof in preparation of super capacitor
  • Sheet-like calcium-doped nickel hydroxide electrode material, manufacturing method thereof and application thereof in preparation of super capacitor
  • Sheet-like calcium-doped nickel hydroxide electrode material, manufacturing method thereof and application thereof in preparation of super capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Disperse 0.5g of calcium hydroxide in 50ml of water and stir for 24 hours to prepare a calcium hydroxide slurry with a concentration of 10g / L, then dissolve 7.25g of nickel nitrate in 50ml of water to obtain a precursor solution with a concentration of 0.5mol / L. The calcium hydroxide slurry and the precursor solution were mixed and stirred for 24 h. The stirred mixed system is filtered, washed and dried at 80° C. to obtain calcium-doped nickel hydroxide. The morphology of the product was characterized by transmission electron microscopy, as figure 1 As shown, the crystallinity of the product was characterized by high power transmission electron microscopy and powder X-ray diffraction as figure 2 and image 3 As shown, the pore structure of the product was characterized by transmission electron microscopy and nitrogen adsorption isotherm as Figure 4 shown.

Embodiment 2

[0041] Disperse 0.75g of calcium hydroxide in 50ml of water and stir for 36 hours to prepare a calcium hydroxide slurry with a concentration of 15g / L, then dissolve 1.94g of nickel chloride in 50ml of water to obtain a precursor solution with a concentration of 0.3mol / L. The calcium hydroxide slurry and the precursor solution were mixed and stirred for 48 h. The stirred mixed system is filtered, washed and dried at 80° C. to obtain calcium-doped nickel hydroxide. The shape of the product is as Figure 5 shown.

Embodiment 3

[0043] Disperse 1.0g of calcium hydroxide in 50ml of water and stir for 48 hours to prepare a calcium hydroxide slurry with a concentration of 20g / L, then dissolve 1.76g of nickel acetate in 50ml of water to obtain a precursor solution with a concentration of 0.2mol / L. The calcium hydroxide slurry and the precursor solution were mixed and stirred for 72 h. The stirred mixed system is filtered, washed and dried at 80° C. to obtain calcium-doped nickel hydroxide. The shape of the product is as Figure 6 shown.

[0044] The performance test of the supercapacitor is tested by using a three-electrode method, and the specific test process will be described in detail with the following examples.

[0045]Supercapacitor Performance Test Example

[0046] The prepared calcium-doped functionalized nickel hydroxide material, conductive carbon black and binder (polytetrafluoroethylene) were mixed in a ratio of 75:20:5 and dispersed in absolute ethanol to obtain an electrode slurry. Coat...

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Abstract

The invention provides a sheet-like calcium-doped nickel hydroxide electrode material manufacturing method. The method comprises: mixing the calcium hydroxide slurry with the concentration of 10 ~ 20g / L and the nickel ion solution with the concentration of 0.2 ~ 0.5mol / L; carrying out the ion exchange reaction; filtering the mixed and stirred system; cleaning and baking the mixed system dry at the temperature of 80 degrees; and obtaining the sheet-like calcium-doped nickel hydroxide electrode material. When the sheet-like calcium-doped nickel hydroxide electrode material obtained from the method is used as an electrode material to be applied to a super capacitor for energy storage, a higher capacity and a more excellent cycle life can be achieved than an ordinary method for preparing the nickel hydroxide.

Description

[0001] Technical field: [0002] The invention belongs to the field of synthesis of functionalized inorganic nanomaterials and application of electrochemical energy storage, and relates to a calcium-doped functionalized nickel hydroxide material with flake-like morphology synthesized by an ion exchange method and its application in electrochemical supercapacitors application in preparation. [0003] Background technique: [0004] Supercapacitor is a new type of energy storage device between traditional capacitors and rechargeable batteries. As a new type of energy storage device, it has high energy density, high power density, long service life, wide operating temperature range, and fast charging speed. specialty. Since 1957, the publication of the first patent on supercapacitors has set off a worldwide research boom on supercapacitors. Since then, supercapacitors have gradually stepped out of the laboratory and entered a broad application field. [0005] Nickel hydroxide is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/86
CPCH01G11/30H01G11/86Y02E60/13
Inventor 田正芳解明江张万举王永正沈宇郭学锋
Owner HUANGGANG NORMAL UNIV