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Vertical graphene-supported carbon nanotube composite electrode material and its preparation method and application in all-solid-state zinc-air batteries
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A carbon nanotube composite and graphene nanosheet technology is applied in the direction of fuel cell half-cells and primary battery half-cells, electrical components, battery electrodes, etc., which can solve the problems of resource shortage and high cost of precious metals, and achieve improved Conductive efficiency, good flexibility, and the effect of improving electrochemical performance
Active Publication Date: 2022-04-26
HARBIN INST OF TECH
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Noble metal catalysts such as rubidium, iridium, and platinum-based catalysts are currently widely considered to be highly efficient ORR and OER catalysts, but noble metals are expensive and resources are scarce, and it has become the research of scientific researchers to find materials that can replace them and have comparable catalytic capabilities. hotspot
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[0035] Such as Figure 1 to Figure 9 As shown, the vertical graphene-loaded carbon nanotube composite electrode material involved in this embodiment and its preparation method and application in all-solid-state zinc-air batteries include:
[0036] A kind of preparation method of vertical graphene supported carbon nanotube composite electrode material, this preparation method is carried out according to the following steps:
[0037] Step 1, using radio frequency plasma enhanced chemical vapor deposition technology to grow vertical graphene nanosheet arrays on carbon cloth;
[0038] Step 2, utilizing the polymerization reaction to grow Zif-67 on the vertical graphene nanosheet array obtained in step 1, to obtain the Zif-67 electrode material supported by vertical graphene;
[0039] Step 3, using chemical vapor deposition technology, under the atmosphere of nitrogen source provided by melamine, hydrogen and argon, carbon nanotubes are grown on the vertical graphene-loaded Zif-67...
Embodiment 1
[0049] Step 1. Using radio frequency plasma enhanced chemical vapor deposition technology to grow vertical graphene nanosheet arrays on carbon cloth. Put the dry and clean carbon cloth into the tube furnace, feed methane and hydrogen, the flow ratio of methane and hydrogen is 1:4sccm, react at 700°C for 90min;
[0050] Step 2. Dissolve 0.144g of cobalt nitrate and 0.324g of dimethylimidazole in 10ml of methanol respectively. After mixing the two solutions, stir them magnetically for 5 minutes until the solution is evenly mixed. Immerse the carbon cloth with vertical graphene vertically and let it stand After 20 hours, take it out, wash it with methanol and deionized water alternately for 3 times, dry it in vacuum at 70°C for 12 hours, and set it aside;
[0051] Step 3, growing carbon nanotubes by chemical vapor deposition technology. Put the Zif-67-supported carbon cloth on vertical graphene into a tube furnace, put 1 g of melamine as a nitrogen source, feed 90 sccm of argon ...
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Abstract
The invention provides a vertical graphene-loaded carbon nanotube composite electrode material, a preparation method thereof and an application in an all-solid zinc-air battery, belonging to the technical field of all-solid metal-air battery electrode materials. The present invention uses radio frequency plasma enhanced chemical vapor deposition technology to grow vertical graphene nanosheet arrays on carbon cloth, and then immerses it in the Zif-67 precursor solution for 20 hours, then washes, dries, and uses chemical vapor deposition technology to calcinate , under hydrogen and argon atmospheres, carbon nanotubes were grown on vertical graphene-loaded Zif-67 precursors when melamine provided the nitrogen source. The material prepared by the present invention shows excellent catalytic performance in both ORR and OER. When used as the cathode of an all-solid zinc-air battery, it has excellent electrochemical performance and cycle stability. It is used as an electrode material for an all-solid metal-air battery. The technical field will have broad application prospects.
Description
technical field [0001] The invention relates to a vertical graphene-supported carbon nanotube composite electrode material, a preparation method thereof and an application in an all-solid zinc-air battery, belonging to the technical field of all-solid metal-air battery electrode materials. Background technique [0002] In recent years, with the development of human society, the contradiction between environment and energy issues has become increasingly prominent. Energy shortage has become the primary factor restricting social development. At the same time, the excessive use of fossil fuels has also brought a load on the environment. Therefore, people will face energy A major change in the field is predictable, and the search for efficient and clean green energy has become a hot research topic for researchers at home and abroad. Currently, efforts are being made to study electrochemical storage and conversion devices. Rechargeable metal-air batteries are considered as one o...
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