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Cobalt disulfide/nitrogen-sulfur co-doped mesoporous carbon composite catalyst for zinc-air battery and preparation method of cobalt disulfide/nitrogen-sulfur co-doped mesoporous carbon composite catalyst

A nitrogen-sulfur co-doping, zinc-air battery technology, applied in fuel cell type half cells and secondary battery type half cells, battery electrodes, circuits, etc. Catalytic activity, simple process, and the effect of preventing metal particle agglomeration

Active Publication Date: 2021-10-01
HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The presence of heteroatoms will change the electronic structure of the carbon framework, forming more defects

Method used

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  • Cobalt disulfide/nitrogen-sulfur co-doped mesoporous carbon composite catalyst for zinc-air battery and preparation method of cobalt disulfide/nitrogen-sulfur co-doped mesoporous carbon composite catalyst
  • Cobalt disulfide/nitrogen-sulfur co-doped mesoporous carbon composite catalyst for zinc-air battery and preparation method of cobalt disulfide/nitrogen-sulfur co-doped mesoporous carbon composite catalyst
  • Cobalt disulfide/nitrogen-sulfur co-doped mesoporous carbon composite catalyst for zinc-air battery and preparation method of cobalt disulfide/nitrogen-sulfur co-doped mesoporous carbon composite catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Weigh 0.3 g of cobalt acetate, 0.989 g of 2-methylimidazole and 0.027 g of β-cyclodextrin, and dissolve them in ethanol and water, respectively. The three solutions were mixed and stirred for 0.5 h.

[0039] (2) Weigh 0.25 g of asphalt and 0.195 g of SBA-15 and put them in an agate mortar, add the mixed solution obtained in step (1), and grind evenly under a heat lamp to fully mix the raw materials with the silica template to obtain Calcined precursors.

[0040] (3) The calcined precursor obtained in step (2) was placed in a tube furnace for calcination under a nitrogen atmosphere. First, the temperature was raised to 300 °C and kept for 2 h, then continued to be heated to 600 °C and kept for 2 h at a heating rate of 5 °C. min-1.

[0041] (4) The calcined product obtained in step (3) was washed with alkali in 1 mol L-1 NaOH solution at 60 °C or 80 °C for 24 h to remove the silica template. In this implementation, alkali washing is preferably performed at 80°C.

...

Embodiment 2

[0045] (1) Weigh 0.3 g of cobalt acetate, 0.989 g of 2-methylimidazole and 0.0068 g of β-cyclodextrin, and dissolve them in ethanol, ethanol and water respectively. The three solutions were mixed and stirred for 0.5 h.

[0046] (2) Same as step (2) in Example 1 of the manufacturing method.

[0047] (3) Same as step (3) in Example 1 of the manufacturing method.

[0048] (4) Same as step (4) in Example 1 of the manufacturing method.

[0049] (5) Same as step (5) in Example 1 of the production method.

[0050] (6) Same as step (6) in Example 1 of the manufacturing method.

Embodiment 3

[0052] (1) Weigh 0.3 g of cobalt acetate, 0.989 g of 2-methylimidazole and 0.0034 g of β-cyclodextrin, and dissolve them in ethanol, ethanol and water respectively. The three solutions were mixed and stirred for 0.5 h.

[0053] (2) Same as step (2) in Example 1 of the manufacturing method.

[0054] (3) Same as step (3) in Example 1 of the manufacturing method.

[0055] (4) Same as step (4) in Example 1 of the manufacturing method.

[0056] (5) Same as step (5) in Example 1 of the production method.

[0057] (6) Same as step (6) in Example 1 of the manufacturing method.

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Abstract

The invention relates to the technical field of zinc air battery cathode materials, in particular to a cobalt disulfide / nitrogen-sulfur co-doped mesoporous carbon composite catalyst for a zinc-air battery and a preparation method of the cobalt disulfide / nitrogen-sulfur co-doped mesoporous carbon composite catalyst. Nitrogen-sulfur co-doped mesoporous carbon serves as a matrix of the catalyst, and nanoscale cobalt disulfide particles are loaded in situ inside the catalyst. The catalyst material (CoS2 / NSC-MC) is prepared by the steps of taking cobalt acetate, 2-methylimidazole and beta-cyclodextrin as raw materials, preparing an ethanol or aqueous solution of the raw materials, adding asphalt and SBA-15, grinding, drying, calcining at high temperature, removing a template by adopting a NaOH solution, uniformly mixing with sublimed sulfur, and carrying out high-temperature heat treatment to obtain the catalyst material. The preparation process is simple, the material structure is unique, and the prepared catalyst can be used for a cathode of the zinc-air battery to realize efficient catalysis of oxygen electrode reaction.

Description

technical field [0001] The invention relates to the technical field of cathode materials for zinc-air batteries, in particular to a cobalt disulfide / nitrogen-sulfur co-doped mesoporous carbon composite catalyst for zinc-air batteries and a preparation method thereof, aiming at dispersing metal particles through surfactants and dissolving asphalt Carbonization to form amorphous carbon yields a method that can simultaneously enhance the catalytic activity of ORR and OER. Background technique [0002] Zinc-air battery (ZAB) is considered to be the best choice for electrochemical energy technology due to its high theoretical energy density (1086 Wh kg-1), low price and high safety. However, low energy efficiency and low stability due to sluggish reaction and low durability of the air electrode hinder the application of rechargeable Zn-air batteries. At present, noble metal materials are the most effective catalysts for ORR / OER, but the high cost, poor bifunctional activity and ...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M12/08B82Y30/00B82Y40/00
CPCH01M4/9083H01M12/08B82Y30/00B82Y40/00
Inventor 王溦李丽芩官鸣宇侯朝辉陈梁
Owner HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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