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Core-shell nickel hydroxide nanosheet/manganese-cobalt oxide composite electrode material and preparation method thereof

A nickel hydroxide and composite electrode technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, can solve the problems of poor cycle stability and low capacitance of manganese cobalt oxide, and achieve high charge and discharge stability, The effect of high repeatability and good electrical conductivity

Active Publication Date: 2019-04-12
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the objectives of the present invention is to propose a nano-flower core-shell nickel hydroxide nanosheet / manganese-cobalt oxide composite electrode material in order to solve the problems of low capacitance and poor cycle stability of the above-mentioned manganese-cobalt oxide.

Method used

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  • Core-shell nickel hydroxide nanosheet/manganese-cobalt oxide composite electrode material and preparation method thereof
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  • Core-shell nickel hydroxide nanosheet/manganese-cobalt oxide composite electrode material and preparation method thereof

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Embodiment 1

[0063] A kind of nickel hydroxide nanosheet / manganese cobalt oxide composite electrode material of the present invention is based on MnCo 2 o 4.5 As the nucleus, nickel hydroxide nanosheets are uniformly grown on its surface.

[0064] The present invention also provides a method for preparing the aforementioned nanoflower core-shell nickel hydroxide nanosheet / manganese cobalt oxide composite electrode material, comprising the following steps:

[0065] (1) Ultrasonic dispersion of cobalt chloride hexahydrate, manganese chloride tetrahydrate, ammonium fluoride and urea in deionized water (power is 500-600W) to obtain a uniformly mixed solution;

[0066] In the above mixed solution, calculated per liter, its components and contents are as follows:

[0067]

[0068] (2), transfer the mixed solution obtained in step (1) into a hydrothermal kettle, then put into 10mm×50mm foam nickel, and react in hydrothermal reaction at 120° C. for 6 hours, then rinse with absolute ethanol an...

Embodiment 2

[0081] A kind of nickel hydroxide nanosheet / manganese cobalt oxide composite electrode material of the present invention is based on MnCo 2 o 4.5 As the nucleus, nickel hydroxide nanosheets are uniformly grown on its surface.

[0082] The present invention also provides a method for preparing the aforementioned nanoflower core-shell nickel hydroxide nanosheet / manganese cobalt oxide composite electrode material, comprising the following steps:

[0083](1) Ultrasonic dispersion of cobalt chloride hexahydrate, manganese chloride tetrahydrate, ammonium fluoride and urea in deionized water (power is 500-600W) to obtain a uniformly mixed solution;

[0084] In the above mixed solution, calculated per liter, its components and contents are as follows:

[0085]

[0086] (2), transfer the mixed solution obtained in step (1) into a hydrothermal kettle, then put into 10mm×50mm nickel foam, and react in hydrothermal reaction at 140° C. for 6 hours, then rinse with absolute ethanol and...

Embodiment 3

[0093] A kind of nickel hydroxide nanosheet / manganese cobalt oxide composite electrode material of the present invention is based on MnCo 2 o 4.5 As the nucleus, nickel hydroxide nanosheets are uniformly grown on its surface.

[0094] The present invention also provides a method for preparing the aforementioned nanoflower core-shell nickel hydroxide nanosheet / manganese cobalt oxide composite electrode material, comprising the following steps:

[0095] (1), cobalt chloride hexahydrate, manganese chloride tetrahydrate, ammonium fluoride and urea are dispersed in deionized water uniformly under the control power of 500-600W and ultrasonic conditions at room temperature to obtain a mixed solution;

[0096] In the above mixed solution, calculated per liter, its components and contents are as follows:

[0097]

[0098] (2), transfer the mixed solution obtained in step (1) into a hydrothermal kettle, then add nickel foam with a length of 1*5CM, and carry out hydrothermal reactio...

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Abstract

The invention discloses a nanoflower nickel hydroxide nanosheet / manganese-cobalt oxide composite electrode material and a preparation method thereof. The nanoflower nickel hydroxide nanosheet / manganese-cobalt oxide composite electrode material takes MnCo<2>O<4.5> nanoflower as a core, nickel hydroxide nanosheets are uniformly grown on a surface of the core, so that the nanoflower nickel hydroxidenanosheet / manganese-cobalt oxide composite electrode material which has high specific capacity and charge-discharge stability and does not need a binding agent and a conductive agent is prepared, andthe nanoflower nickel hydroxide nanosheet / manganese-cobalt oxide composite electrode material can be used for the field of supercapacitors, is simple in preparation process and high in repeatability and is convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor material synthesis, and relates to a core-shell nickel hydroxide nanosheet / manganese cobalt oxide composite electrode material and a preparation method thereof. Background technique [0002] In recent years, supercapacitors have been widely studied due to their high specific capacity, high power density, long cycle life, light weight, small size, and high safety. However, certain achievements have been made in improving the energy storage performance of supercapacitors such as specific capacity, power density, stability and energy density. However, due to the rapid development of society and the advancement of demand, people now have higher and higher requirements for the operational efficiency, safety and intelligence of electronic equipment, and supercapacitors are one of the main energy devices. Supercapacitors Generally divided into three types based on the energy storage mechanism and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/46H01G11/86
CPCH01G11/24H01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 汪桂根刘益林张化宇党乐阳
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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