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Cobalt-based composite electrode material based on anion exchange technology and preparation thereof

A composite electrode and exchange technology, which is applied in the field of cobalt-based composite electrode materials and its preparation, can solve the problems of particle aggregation, scalability, and adverse effects on electrochemical performance, and achieve simple and controllable preparation methods, cost-effectiveness and Scalability, Effects of Superior Supercapacitor Performance

Active Publication Date: 2022-05-27
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Conventional electrode materials are usually synthesized by methods such as ball milling, co-precipitation, chemical vapor deposition, or hydrothermal growth, which either lead to severe particle aggregation or require multi-step continuous energy input, thus limiting scalability and adverse effect on electrochemical performance

Method used

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  • Cobalt-based composite electrode material based on anion exchange technology and preparation thereof
  • Cobalt-based composite electrode material based on anion exchange technology and preparation thereof
  • Cobalt-based composite electrode material based on anion exchange technology and preparation thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0050] (1) Add 2.91g of cobalt nitrate hexahydrate and 3.28g of 2-methylimidazole into 125ml of methanol solution with a balance, stir fully to dissolve them completely, then slowly mix the two solutions together, stir Let stand for 10 minutes for 24 hours, then centrifuge at 8000r / min for 5 minutes, wash with absolute ethanol 3-5 times, and dry at 60°C for 12 hours to obtain purple ZIF-67 nanoparticles;

[0051] (2) Weigh 4.5g PAN with a balance and place it in 45.5g DMF solution and stir it under a magnetic stirrer for 24h. After obtaining a PAN solution with a concentration of 9%, put the ZIF-67 nanoparticles prepared above into the PAN solution, and then stirred under a magnetic stirrer for 12 hours, the final prepared spinning solution was dropped into the porous spinneret, and the nanofiber membrane loaded with ZIF-67 was prepared in batches by using an air-supplied porous electrospinning device;

[0052] (3) Place the spun nanofiber membrane in an electric constant temp...

Embodiment 2

[0059] (1) Use a balance to weigh 4.5g of polyacrylonitrile, 2.91g of cobalt nitrate hexahydrate, and 3.28g of 2-methylimidazole into 45.5g of N,N-dimethylformamide solution, and stir for 24 hours under a magnetic stirrer , the prepared spinning solution is dropped into the porous spinneret, and the nanofiber membrane loaded with ZIF-67 is prepared by using the air-supplied porous electrospinning device;

[0060] (2) Dry in an electric constant temperature drying oven at room temperature for 16-24 hours, take it out and put it into a muffle furnace to pre-oxidize at 240°C at a heating rate of 2°C / min, and keep it at 240°C for 2h;

[0061] (3) Prepare 30-50 ml of NaOH solution with a pH of 11-12.5, and then place the pre-oxidized nanofibrous membrane in NaOH solution for 12 hours to perform anion exchange (under normal temperature and pressure);

[0062] (4) Place the exchanged nanofiber membrane in an oven, and dry at 60° C. for 12 to 16 hours. Finally, the above-mentioned na...

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Abstract

The invention relates to a cobalt-based composite electrode material based on an anion exchange technology and preparation thereof, and belongs to the technical field of electrode materials. The preparation method of the cobalt-based composite electrode material comprises the following steps: preparing a nanofiber membrane loaded with ZIF-67; the ZIF-67 loaded nanofiber membrane is sequentially subjected to pre-oxidation, anion exchange and carbonization treatment, and a product is obtained. The cobalt-based composite electrode material has relatively high specific surface area and mesopore content, so that an effective hierarchical porous structure is formed, the electrode material and an electrolyte have more contact due to the high specific surface area, a favorable channel is provided for ion transportation and electron absorption / desorption, and the cobalt-based composite electrode material has excellent supercapacitor performance; the preparation method is simple, convenient, low in cost and high in expansibility.

Description

technical field [0001] The invention relates to the technical field of electrode materials, in particular to a cobalt-based composite electrode material based on anion exchange technology and preparation thereof. Background technique [0002] In the 21st century, the great circulation and integration of international industries have brought about the rapid development of the manufacturing industry, driven huge demand for energy and energy storage, and faced overall carbon emissions and environmental pressures. Therefore, the development of green and renewable energy conversion and energy storage equipment has become an important subject of human research. Supercapacitors are regarded as an alternative or supplementary rechargeable battery in applications requiring high power delivery or fast energy storage due to their high power density, long cycle stability and high safety. key. [0003] Conventional electrode materials are usually synthesized by methods such as ball mil...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/34H01G11/36H01G11/24D04H1/70
CPCH01G11/30H01G11/34H01G11/36H01G11/24D04H1/70Y02E60/13
Inventor 徐岚隗冬王萍刘福娟
Owner SUZHOU UNIV
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