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Preparation and application of composite carbon nanoparticles loaded with ferrocobalt core-shell structure

A nanoparticle, core-shell structure technology is applied in the field of rechargeable zinc-air battery catalysts, which can solve the problems of low reserves, high cost, limited development, etc., and achieve the effects of increasing specific surface area, low cost, and improving electrochemical performance.

Pending Publication Date: 2022-07-08
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the Pt-based catalyst has the characteristics of high activity for ORR and can reduce the overpotential, but its high cost, low reserves, serious catalyst poisoning introduced by anode fuel penetration, and insignificant catalytic ability greatly limit the development.
In addition, IrO 2 and RuO 2 It is considered to be an efficient OER catalytic material, but there are also problems such as high cost and scarce resources.

Method used

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  • Preparation and application of composite carbon nanoparticles loaded with ferrocobalt core-shell structure
  • Preparation and application of composite carbon nanoparticles loaded with ferrocobalt core-shell structure
  • Preparation and application of composite carbon nanoparticles loaded with ferrocobalt core-shell structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: A composite carbon nanoparticle with a cobalt-iron core-shell structure, the matrix is ​​an iron-cobalt composite carbon dodecahedron nanoparticle, the load is a core-shell structure cobalt-iron bimetallic alloy@metal oxide, and the modification adopts Radio frequency plasma treatment, and its preparation method specifically includes the following steps:

[0035] (1) Synthesis of ZIF-67:

[0036] With 0.6696g Co(NO 3 ) 6H 2 O is the Co source mixed with 60mL methanol solution, ultrasonic for 30 minutes is A solution, then weigh 0.7896g dimethylimidazole and mix with an equal amount of 60mL methanol solution, ultrasonic for 30 minutes is B solution, then the two solutions are mixed in Stir together to form ZIF-67.

[0037] (2) Synthesis of MIL-101:

[0038] 0.29g FeCl 3 ·6H 2 The O solution was heated to 160 °C in 40 mL of dimethylformamide and refluxed for 15 minutes to form solution C. 0.2 g of 2-aminoterephthalic acid was added to 10 mL of dimethylfor...

Embodiment 2

[0041] Example 2: A composite carbon nanoparticle with a cobalt-iron core-shell structure, the matrix is ​​an iron-cobalt composite carbon dodecahedron nanoparticle, the load is a core-shell structure cobalt-iron bimetallic alloy@metal oxide, and the modification adopts Radio frequency plasma treatment, and its preparation method specifically includes the following steps:

[0042] (1) Synthesis of ZIF-67:

[0043] With 0.6696g Co(NO 3 ) 6H 2 O is the Co source mixed with 60mL methanol solution, ultrasonic for 30 minutes is A solution, then weigh 0.7896g dimethylimidazole and mix with an equal amount of 60mL methanol solution, ultrasonic for 30 minutes is B solution, then the two solutions are mixed in Stir together to form ZIF-67.

[0044] (2) Synthesis of MIL-101:

[0045] 0.29g FeCl 3 ·6H 2 The O solution was heated to 160 °C in 40 mL of dimethylformamide and refluxed for 15 minutes to form solution C. 0.2 g of 2-aminoterephthalic acid was added to 10 mL of dimethylfor...

Embodiment 3

[0049] Example 3: A composite carbon nanoparticle with a cobalt-iron core-shell structure, the matrix is ​​an iron-cobalt composite carbon dodecahedron nanoparticle, the load is a core-shell structure cobalt-iron bimetallic alloy@metal oxide, and the modification adopts Radio frequency plasma treatment, and its preparation method specifically includes the following steps:

[0050] (1) Synthesis of ZIF-67:

[0051] With 0.6696g Co(NO 3 ) 6H 2 O is the Co source mixed with 60mL methanol solution, ultrasonic for 30 minutes is A solution, then weigh 0.7896g dimethylimidazole and mix with an equal amount of 60mL methanol solution, ultrasonic for 30 minutes is B solution, then the two solutions are mixed in Stir together to form ZIF-67.

[0052] (2) Synthesis of MIL-101:

[0053] 0.29g FeCl 3 ·6H 2 The O solution was heated to 160 °C in 40 mL of dimethylformamide and refluxed for 15 minutes to form solution C. 0.2 g of 2-aminoterephthalic acid was added to 10 mL of dimethylfor...

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Abstract

The invention belongs to the technical field of rechargeable zinc-air battery catalysts, and particularly relates to a preparation method of core-shell structure-loaded ferrocobalt bimetallic alloy and metal oxide composite carbon nanoparticles, which specifically comprises the following steps: step 1, preparing a carbon dodecahedron and a cobalt source; 2, preparing an iron source; and step 3, processing the composite carbon nano-particles loaded with the core-shell structure ferrocobalt bimetallic alloy and the metal oxide by radio frequency plasma, applying the composite carbon nano-particles to oxygen reduction (ORR) and oxygen evolution (OER) reactions for catalyzing the air cathode of the rechargeable zinc-air battery, and adjusting the discharge technical parameters of the radio frequency plasma so as to obtain the composite carbon nano-particles loaded with the core-shell structure ferrocobalt bimetallic alloy and the metal oxide. The metal oxide can be effectively grown on the surface of the catalyst (CoFe-NC) to form a core-shell structure, defects are introduced, the specific surface area of the catalyst is increased, more catalytic active sites are exposed, and therefore the OER / ORR electrochemical performance of the air cathode of the zinc air battery can be better improved.

Description

technical field [0001] The invention belongs to the technical field of rechargeable zinc-air battery catalysts, and in particular relates to composite carbon nanoparticles with a cobalt-iron bimetallic alloy@metal oxide core-shell structure supported by radio frequency plasma treatment, a preparation method thereof, and use in a rechargeable zinc-air battery. Applications. Background technique [0002] With the intensification of environmental pollution and energy crisis, it is imminent to seek renewable and environmentally friendly new energy sources to replace traditional fossil energy. Nowadays, renewable energy sources such as wind energy, solar energy and tidal energy have been widely used to provide energy supply for people's production and life. However, these natural energy sources have the characteristics of volatility and intermittence, which cannot provide energy for the rapidly developing economy and society. Continuous energy support. Rechargeable zinc-air bat...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90H01M12/06
CPCH01M4/88H01M4/9083H01M12/06Y02E60/50
Inventor 蒋仲庆熊易
Owner ZHEJIANG SCI-TECH UNIV