Method for preparing supercapacitor electrode material basic nickel-cobalt carbonate through hydrothermal method

A supercapacitor, nickel-cobalt carbonate technology, applied in hybrid capacitor electrodes, nickel carbonate, cobalt carbonate and other directions, can solve problems such as unsatisfactory electrochemical performance, and achieve improved capacity rate characteristics, improved electrochemical performance, and good stability. Effect

Inactive Publication Date: 2017-04-26
BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the present invention provides a method for preparing supercapacitor electrode material basic nickel-cobalt carbonate by hydrothermal method, which overcomes the problem of unsatisfactory electrochemical properties of existing supercapacitor electrode materials and obtains a three-dimensional porous structure, which is beneficial to The electrolyte is fully wetted and penetrated to improve the electrochemical performance

Method used

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  • Method for preparing supercapacitor electrode material basic nickel-cobalt carbonate through hydrothermal method
  • Method for preparing supercapacitor electrode material basic nickel-cobalt carbonate through hydrothermal method
  • Method for preparing supercapacitor electrode material basic nickel-cobalt carbonate through hydrothermal method

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Embodiment 1

[0036] Weigh a certain amount of Ni(NO 3 ) 2 ·6H 2 O and urea were added to deionized water and stirred until the solids were completely dissolved, wherein: Ni(NO 3 ) 2 ·6H 2 The concentration of O is 0.05mol / L, and the concentration of urea is 0.125mol / L; pour the dissolved mixed solution into a high-pressure reactor, seal it, put it in an oven or a constant temperature box, and react at 90°C 14 hours, remove. After cooling to room temperature, the product was centrifuged, washed three times with deionized water, washed twice with absolute ethanol, and finally dried in vacuum at 80°C for 15 hours to obtain basic nickel carbonate (NiCH). Its surface morphology is as figure 1 As shown, it has a hairy needle-like aggregate structure, which is beneficial to the contact and wetting of the electrolyte, and makes full use of the surface area of ​​the active material.

Embodiment 2

[0038]Weigh a certain amount of CoSO 4 ·7H 2 O and urea were added to deionized water and stirred until the solids were completely dissolved, in which: CoSO 4 ·7H 2 The concentration of O is 0.05mol / L, and the concentration of urea is 0.125mol / L; pour the dissolved mixed solution into a high-pressure reactor, seal it, put it in an oven or a constant temperature box, and react at 90°C 14 hours, remove. After cooling to room temperature, the product was centrifuged, washed three times with deionized water, washed twice with absolute ethanol, and finally vacuum-dried at 80°C for 15 hours to obtain basic cobalt carbonate (CoCH). Its surface morphology is as figure 2 shown.

Embodiment 3

[0040] Weigh a certain amount of Ni(NO 3 ) 2 ·6H 2 O. CoSO 4 ·7H 2 O and urea were added to deionized water and stirred until the solids were completely dissolved, wherein: Ni(NO 3 ) 2 ·6H 2 O and CoSO 4 ·7H 2 The total concentration of O is 0.13mol / L (the molar ratio of nickel salt and cobalt salt is 3:7), and the concentration of urea is 0.25mol / L; pour the dissolved mixed solution into the autoclave and seal it well. Put it into an oven or a constant temperature box, react at 90°C for 14 hours, and take it out. After cooling to room temperature, the product was centrifuged, washed three times with deionized water, washed twice with absolute ethanol, and finally vacuum-dried at 80°C for 15 hours to obtain basic nickel-cobalt carbonate (NiCoCH). Its surface morphology is as image 3 shown.

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Abstract

The invention discloses a method for preparing a supercapacitor electrode material basic nickel-cobalt carbonate through a hydrothermal method. The method comprises the following steps that metal nickel salt and/or metal cobalt salt and urea are weighed separately and mixed with deionized water, and stirring is performed so that solids can be dissolved to obtain a mixed solution; the mixed solution is poured into a high-pressure reactor, sealing is performed for performing a reaction for 10-16 h under the temperature of 80-110 DEG C, and a reaction product is obtained; the reaction product is separated, washed and dried to obtain basic nickel-cobalt carbonate. According to the method for preparing the supercapacitor electrode material basic nickel-cobalt carbonate through the hydrothermal method, on the basis of control over raw material compatibility and reaction conditions, the three-dimensional porous structure and morphology can be obtained, sufficient wetting and permeation of an electrolyte are promoted, the superficial area of active substances is sufficiently utilized, and the electrochemical performance is improved.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and in particular relates to a method for preparing supercapacitor electrode material basic nickel-cobalt carbonate by a hydrothermal method. Background technique [0002] As a new type of energy storage device, supercapacitors have much higher energy density than traditional capacitors and much higher power density than batteries. The combination of high energy density, high power density and long service life has become a research hotspot. At present, supercapacitors have been widely used in mobile communications, industrial fields, consumer electronics, electric vehicles and national defense technology. A supercapacitor consists of four parts: electrode material, electrolyte, separator and current collector. Its performance is mainly affected by the electrode material and the electrolyte system used. Therefore, finding a more ideal electrode system and electrode material has become an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00C01G51/06H01G11/30H01G11/26H01G11/86
CPCY02E60/13C01G53/006C01G51/06C01G53/06C01P2004/03C01P2006/40H01G11/26H01G11/30H01G11/86
Inventor 李亚玲曹梅娟方一辛智青李路海
Owner BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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