Three dimensional gradient metal hydroxide/oxide electrode material and manufacture method and application thereof

A technology of hydroxide and electrode materials, applied in electrode manufacturing, hybrid/electric double layer capacitor manufacturing, nanotechnology for materials and surface science, etc., can solve poor conductivity and ion dynamics, cycle performance and rate Poor performance, limited practical application, etc.

Active Publication Date: 2014-11-05
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, transition metal hydroxides and oxides have poor cycle performance and rate performance during charge and discharge due

Method used

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  • Three dimensional gradient metal hydroxide/oxide electrode material and manufacture method and application thereof
  • Three dimensional gradient metal hydroxide/oxide electrode material and manufacture method and application thereof
  • Three dimensional gradient metal hydroxide/oxide electrode material and manufacture method and application thereof

Examples

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Example Embodiment

[0196] Example 1

[0197] This embodiment provides a method for preparing a three-dimensional gradient metal hydroxide / oxide electrode material, which includes the following steps:

[0198] Follow Ni 2+ :Co 2+ The molar concentration ratio is 1:0, 2:1, 1:1, 1:2, 0:1, and 5 parts of nitrate solution with a total concentration of metal ions are 0.01mol / L; cut the foamed nickel into 1×1cm 2 Size, and after ultrasonic of 3mol / L hydrochloric acid solution for 10 minutes, remove the oxide film on the surface, and then wash it 3 times with deionized water and absolute ethanol; use the treated foamed nickel as the working electrode, saturated calomel and platinum As the reference electrode and the counter electrode, the three-electrode system was assembled, and the constant current 0.0005A was used on the CHI660E electrochemical workstation. 2+ :Co 2+ In the nitrate solution with molar ratio of 1:0, 2:1, 1:1, 1:2, 0:1, electrodeposit for 2 minutes respectively; use deionized water and anhy...

Example Embodiment

[0225] Example 2

[0226] This embodiment provides a method for preparing a three-dimensional gradient metal hydroxide / oxide electrode material, which includes the following steps:

[0227] Follow Ni 2+ :Co 2+ The molar concentration ratios are 4:1, 3:1, 2:1, and 1:1 respectively. 4 parts of sulfate solution with a total concentration of metal ions are 0.02mol / L; cut the foamed copper into a diameter of 1.8 cm round pole piece, and sonicated by 3mol / L hydrochloric acid solution for 10 minutes to remove the oxide film on the surface, and then washed with deionized water and absolute ethanol for 3 times; the treated foam copper is used as the working electrode, Saturated calomel and platinum tablets were used as the reference electrode and counter electrode, respectively, to assemble a three-electrode system. On the CHI660E electrochemical workstation, the constant current was 0.001A, and the Ni 2+ :Co 2+ In the nitrate solution with molar ratio of 4:1, 3:1,2:1, 1:1, electrodeposit f...

Example Embodiment

[0229] Example 3

[0230] This embodiment provides a method for preparing a three-dimensional gradient metal hydroxide / oxide electrode material, which includes the following steps:

[0231] Follow Ni 2+ :Co 2+ The molar ratios are 4:1, 3:1, 2:1, 1:1, and 4 parts of chloride salt solution with a total metal ion concentration of 0.02mol / L are configured; the copper foam is cut into a diameter of 1.8 cm round pole piece, and sonicated by 3mol / L hydrochloric acid solution for 10 minutes to remove the oxide film on the surface, and then washed with deionized water and absolute ethanol for 3 times; the treated foam copper is used as the working electrode, Saturated calomel and platinum tablets were used as the reference electrode and counter electrode, respectively, to assemble a three-electrode system. On the CHI660E electrochemical workstation, the constant current was 0.001A, and the Ni 2+ :Co 2+ In the nitrate solution with molar ratio of 4:1, 3:1,2:1, 1:1, electrodeposit for 2 minut...

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Abstract

The invention provides a three dimensional gradient metal hydroxide/oxide electrode material and a manufacturing method and application thereof. The three dimensional gradient metal hydroxide/oxide electrode material consists of a conductive substrate and a metal compound layer, wherein the metal compound layer is arranged or formed on the surface of the conductive substrate, and the metal compound layer is made of metal hydroxide or oxide; the metal is transition metal, and the content of the metal ions in the metal compound layer decreases or increases in a gradient manner towards the conductive substrate. The three dimensional gradient metal hydroxide/oxide electrode material has the advantages of good cycling performance and good rate capability. The method for manufacturing the three-dimensional gradient metal hydroxide/oxide electrode material is easy and convenient, and the three dimensional gradient metal hydroxide/oxide electrode material can be used for manufacturing electrodes and batteries directly and shows good electrochemical activity.

Description

technical field [0001] The invention relates to the field of electrode material preparation, in particular to a three-dimensional gradient metal hydroxide / oxide electrode material and its preparation method and application. Background technique [0002] With the continuous development of the world economy, more and more attention has been paid to green new energy, and new energy storage devices and energy conversion devices have become key technologies for human beings to make full use of new energy. Among them, electrochemical energy storage and conversion devices, such as supercapacitors, lithium-ion batteries, lithium-oxygen batteries, and metal-air batteries, have been widely studied. [0003] Supercapacitors have attracted more and more researchers' attention because of their advantages such as high energy density, fast charge and discharge, and long cycle life. However, the energy density of supercapacitors is still not high enough, which has become a key factor restr...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/04H01G11/30H01G11/46H01G11/86B82Y30/00
CPCB82Y30/00H01G11/46H01G11/86H01M4/485H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 卢周广杨明阳
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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