Spherical nickel cobalt oxide-ceric oxide composite electrode material with multi-stage structure and preparation method thereof

A ceria and composite electrode technology, which is applied in the fields of hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, nanotechnology for materials and surface science, etc. Supercapacitor energy storage devices, poor electronic conductivity and other problems, to achieve the effect of good application value

Active Publication Date: 2018-11-13
ANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ceria electrode materials have problems such as low surface electrochemical activity, poor electronic conductivity, and low utilization of electrode materials. Therefore, the comprehensive performance of ceria electrode materials is difficult to meet the needs of supercapacitor energy storage devices.

Method used

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  • Spherical nickel cobalt oxide-ceric oxide composite electrode material with multi-stage structure and preparation method thereof
  • Spherical nickel cobalt oxide-ceric oxide composite electrode material with multi-stage structure and preparation method thereof
  • Spherical nickel cobalt oxide-ceric oxide composite electrode material with multi-stage structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] ① Add 0.50mmol nickel acetate tetrahydrate and 1.0mmol cobalt acetate tetrahydrate to a mixed solvent of 10mL 1,3-propanediol and 40mL isopropanol, stir to dissolve and mix well, then transfer the above reaction solution to a reaction kettle, and heat at 160°C Under the condition of solvothermal reaction for 12 hours, after the reaction was completed, naturally cooled to room temperature, the product was centrifuged, washed several times with absolute ethanol and dried to obtain spherical nickel-cobalt hydroxide with hierarchical structure.

[0022] ②Add 0.0500g of cerium nitrate hexahydrate and 0.1g of spherical nickel-cobalt hydroxide with multi-level structure to 20mL of absolute ethanol. Reacted for 8 hours. After the reaction was completed, it was naturally cooled to room temperature, and the product was centrifuged, washed several times with absolute ethanol and dried to obtain nickel-cobalt-cerium hydroxide. The nickel-cobalt-cerium hydroxide is calcined at 300° ...

Embodiment 2

[0025] ① Add 0.25mmol nickel acetate tetrahydrate and 0.50mmol cobalt acetate tetrahydrate to a mixed solvent of 10mL 1,3-propanediol and 40mL isopropanol, stir to dissolve and mix well, then transfer the above reaction solution to a reaction kettle, and heat it at 160°C Under the condition of solvothermal reaction for 12 hours, after the reaction was completed, naturally cooled to room temperature, the product was centrifuged, washed several times with absolute ethanol and dried to obtain spherical nickel-cobalt hydroxide with hierarchical structure.

[0026] ②Add 0.0250g of cerium nitrate hexahydrate and 0.0500g of spherical nickel-cobalt hydroxide with multi-level structure to 20mL of absolute ethanol. Reacted for 8 hours. After the reaction was completed, it was naturally cooled to room temperature, and the product was centrifuged, washed several times with absolute ethanol and dried to obtain nickel-cobalt-cerium hydroxide. The nickel-cobalt-cerium hydroxide is calcined a...

Embodiment 3

[0028] ① Add 0.750mmol nickel acetate tetrahydrate and 1.50mmol cobalt acetate tetrahydrate to a mixed solvent of 20mL 1,3-propanediol and 30mL isopropanol, stir to dissolve and mix well, transfer the above reaction solution to a reaction kettle, Under the condition of solvothermal reaction for 12 hours, after the reaction was completed, naturally cooled to room temperature, the product was centrifuged, washed several times with absolute ethanol and dried to obtain spherical nickel-cobalt hydroxide with hierarchical structure.

[0029] ② Add 0.0750g of cerium nitrate hexahydrate and 0.1500g of spherical nickel-cobalt hydroxide with multi-level structure to 20mL of absolute ethanol. Reacted for 8 hours. After the reaction was completed, it was naturally cooled to room temperature, and the product was centrifuged, washed several times with absolute ethanol and dried to obtain nickel-cobalt-cerium hydroxide. The nickel-cobalt-cerium hydroxide is calcined at a high temperature of ...

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Abstract

The invention, which belongs to the technical field of functional material preparation, discloses a spherical nickel cobalt oxide-ceric oxide composite electrode material with a multi-stage structureand a preparation method thereof. According to the method, multi-stage spherical nickel-cobalt hydroxide is prepared by using nickel acetate and cobalt acetate as raw materials and isopropanol and 1,3-propanediol as solvents based on a solvothermal method; ion exchanging is carried out by using cerous nitrate and nickel-cobalt hydroxide as raw materials and ethyl alcohol as a solvent based on a solvothermal method to prepare nickel-cobalt-cerium hydroxide; and then high-temperature calcination is carried out in an air atmosphere to prepare a multi-stage-structure-based spherical nickel cobaltoxide-ceric oxide composite electrode material. The prepared nickel cobalt oxide-ceric oxide composite electrode material has a multi-stage-structure-based spherical shape formed by assembling of nanosheets; the spherical structure has a diameter of about 1.0 microns and a specific surface area up to 113.02 m<2> g<-1>. When the spherical nickel cobalt oxide-ceric oxide composite electrode materialis applied to the super capacitor, the good electrochemical energy storage performance is realized.

Description

technical field [0001] The invention relates to a spherical nickel cobaltate-cerium dioxide composite electrode material with a multi-level structure and a preparation method thereof, belonging to the technical field of functional material preparation. Background technique [0002] As an electrochemical energy storage device, supercapacitors are favored by researchers due to their fast charge and discharge capabilities, long cycle life, and low manufacturing costs. As a key component of supercapacitor energy storage devices, electrode materials are considered to be one of the main bottlenecks affecting the performance of supercapacitors. Therefore, designing and preparing electrode materials with excellent performance is the key to breaking through this bottleneck. In recent years, ceria has been used as a kind of electrode material, and the pseudocapacitive supercapacitor assembled with it can realize the storage and release of electric energy by utilizing the reversible Fa...

Claims

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Application Information

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IPC IPC(8): H01G11/26H01G11/46H01G11/86B82Y30/00
CPCB82Y30/00H01G11/26H01G11/46H01G11/86Y02E60/13
Inventor 魏成振杜记民刘林程承张道军
Owner ANYANG NORMAL UNIV
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