Self-supporting electrode material, preparation method and application thereof

A self-supporting electrode, copper nitrate technology, applied in nanotechnology for materials and surface science, battery electrodes, fuel cell half-cells and secondary battery-type half-cells, etc., can solve unsafe, organic solvents Not environmentally friendly, easy to explode and other problems, to achieve the effect of easy operation, avoid toxicity, and low overpotential

Active Publication Date: 2021-03-02
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the prior art, copper, cobalt, and sulfur sources are often used in organic solvents for hydrothermal reaction to prepare copper-cobalt-sulfur ternary electrode materials, but some organic solvents, such as isopropanol, have a boiling point of 82.45°C, and their The mixture of steam and air is explosive and unsafe; in addition, organic solvents are not environmentally friendly

Method used

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  • Self-supporting electrode material, preparation method and application thereof
  • Self-supporting electrode material, preparation method and application thereof
  • Self-supporting electrode material, preparation method and application thereof

Examples

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preparation example Construction

[0043] The preparation method of self-supporting electrode material is prepared according to the following steps:

[0044] a, copper nitrate and cobalt nitrate are dissolved in water to obtain the first solution;

[0045] b, dissolving thioacetamide in water, and then adding urea to obtain a second solution;

[0046] c. Mix the first solution and the second solution, then add nickel foam, and react at 180°C for 24 hours;

[0047] d. Washing and drying the reacted product in sequence to obtain a self-supporting electrode material.

[0048] The present invention needs to strictly control the two parameters of temperature and time, and only under the limited temperature and time of the present invention, the formation of the target product can be guaranteed. Too high or too low reaction temperature, too long or too short reaction time are not conducive to the formation of the target product, and will also affect the composition and morphology of the target product.

[0049] In...

Embodiment 1

[0059] The preparation of embodiment 1 self-supporting electrode material

[0060] a, according to the molar ratio of copper nitrate, cobalt nitrate, thioacetamide and urea is 1:2:4.35:2.1, take copper nitrate trihydrate 0.23g, cobalt nitrate hexahydrate 0.56g, thioacetamide 0.31g, urea 0.12g;

[0061] b. Dissolve 0.23g copper nitrate trihydrate and 0.56g cobalt nitrate hexahydrate in 20g water to obtain the first solution; dissolve 0.31g thioacetamide in 15mL deionized water, then add 0.12g urea to obtain the second solution solution;

[0062] c. Pour the first solution into the second solution, add a piece of nickel foam for stirring, and then carry out hydrothermal reaction; the reaction temperature of the hydrothermal reaction is controlled at 180 degrees Celsius, and the reaction time is controlled at 24 hours.

[0063] d. Washing and drying the product after the hydrothermal reaction in sequence to obtain the electrode material S1.

[0064] The XRD pattern of S1 is as...

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Abstract

The invention relates to a self-supporting electrode material and its preparation method and application, belonging to the field of electrode materials. The self-supporting electrode material prepared by the present invention is composed of nanoparticles with a diameter of about 30-60nm gathered together, and coated with a layer of nano-film on the outside to form a nano-spherical structure. The electrode material prepared by the present invention has excellent electrochemical performance, exhibits good electrocatalytic performance in the battery, and also avoids side reactions and poor cycle performance of the lithium-oxygen battery due to the use of carbon materials and binders in the charging process. question.

Description

technical field [0001] The invention relates to a self-supporting electrode material and its preparation method and application, belonging to the field of electrode materials. Background technique [0002] The lithium-oxygen battery is a new type of fuel cell in which metallic lithium is used as the negative electrode and oxygen is used as the positive electrode. Lithium-oxygen batteries have the advantages of high theoretical energy density, abundant sources of positive electrode materials, green and pollution-free, recyclable, and low cost, and are a good energy storage device. Although lithium-oxygen batteries have the above advantages, due to the high charging overpotential and hysteresis oxygen reduction reaction kinetics, the electrochemical performance of lithium-oxygen batteries during charge and discharge is not good, and it also reduces the capacity of lithium-oxygen batteries. cycle life. [0003] Ternary copper cobalt sulfide (CuCo 2 S 4 ) has been widely use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/88H01M12/08B82Y30/00
CPCB82Y30/00H01M4/8657H01M4/88H01M12/08Y02E60/10
Inventor 龙剑平候志前舒朝著杨梅杨庭帅
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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