Preparation method of supercapacitor cobaltous oxide electrode material

A technology for supercapacitors and electrode materials, which is applied in the fields of electrochemical science and energy, can solve problems such as limiting capacitance performance, and achieve the effects of stable working window, low manufacturing cost, and good stability

Inactive Publication Date: 2013-10-23
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the improvement of the capacitanc

Method used

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  • Preparation method of supercapacitor cobaltous oxide electrode material
  • Preparation method of supercapacitor cobaltous oxide electrode material
  • Preparation method of supercapacitor cobaltous oxide electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Example 1: Using absolute ethanol as a solvent to prepare a cobalt oxide electrode and evaluate its capacitance performance

[0039] Cobalt nitrate and cetyltrimethylammonium bromide are mixed according to the mass ratio of 10:1, dissolved in 15ml of absolute ethanol; the solution is poured into a reaction kettle with a capacity of 25ml, and simultaneously in the reaction kettle Put in the foamed nickel substrate; put the reactor into a constant temperature oven at a temperature of 160°C, and the solvent heating time is 24 hours; after the solvent thermal reaction is completed, take out the black foamed nickel electrode from the reactor and rinse it with deionized water Clean; dry the cleaned electrode in a constant temperature oven at a temperature of 80°C for 6 hours to obtain a cobalt oxide electrode.

[0040]The cobalt oxide electrode was electrochemically tested, and the prepared cobalt oxide electrode was used as the working electrode, the saturated calomel electr...

Embodiment 2

[0041] Embodiment 2: Change the solvothermal time to the evaluation of the capacitive performance of cobalt oxide electrode

[0042] According to the preparation process of Example 1, cobalt nitrate and cetyltrimethylammonium bromide are in a mass ratio of 10:1, using absolute ethanol as a solvent, the temperature is 160 ° C, and the solvent heating time is 12 hours, and the same can be A cobalt oxide electrode was prepared. With 5mol / L KOH aqueous solution as the electrolyte, when the current density is 2A / g, the specific capacitance reaches 595.11F / g.

Embodiment 3

[0043] Example 3: Preparation of Cobalt Oxide Electrode and Evaluation of Capacitance Performance Using Isopropanol as Solvent

[0044] The solvent in the preparation process of Example 1 was replaced by isopropanol instead of absolute ethanol as the solvent, cobalt nitrate and cetyltrimethylammonium bromide in a mass ratio of 10:1, the temperature was 160°C, and the time For 24 hours, a cobalt oxide electrode was prepared. With 5mol / L KOH aqueous solution as the electrolyte, when the current density is 2A / g, the specific capacitance reaches 857.5F / g.

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Abstract

The invention discloses a preparation method of supercapacitor cobaltous oxide electrode material, belonging to the technical fields of electrochemical science and energy. The preparation method is characterized by taking foamed nickel as a substrate, cobalt nitrate and surface active agent as raw materials, and ethyl alcohol or isopropyl alcohol as a solvent, and the cobaltous oxide electrode material can be prepared by a solvothermal method. The preparation method has the advantages of being simple in production technology and equipment and low in preparation cost; the obtained cobaltous oxide electrode material has good stability and high specific capacitance.

Description

technical field [0001] The invention relates to a preparation method of a cobalt oxide electrode material for a supercapacitor, belonging to the field of electrochemical science and energy technology. Background technique [0002] In recent years, with the rapid development of various electronic digital products, people have put forward higher and higher requirements for the capacity and high-current discharge performance of batteries. Supercapacitors, also known as electrochemical capacitors, are a new type of energy storage element between traditional capacitors and batteries that have attracted widespread attention in recent years. It has the advantages of high power density of conventional capacitors and high energy density of rechargeable batteries. It can release large currents instantly, charge and discharge quickly, and has high charging efficiency, long cycle life, no memory effect, and no pollution to the environment. With the development of research on the power ...

Claims

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Application Information

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IPC IPC(8): C01G51/04H01G11/46
CPCY02E60/13
Inventor 陈益钢朱涛郑斯佳陈银儿
Owner SHANGHAI UNIV
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