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Flexible neutral zinc air battery and preparation method thereof

A zinc-air battery, neutral technology, applied in the direction of battery electrodes, fuel cell half-cells and primary battery-type half-cells, circuits, etc., can solve the problem of lack of flexible neutral zinc-air batteries, etc., to achieve enhanced conductivity , low price, high oxygen reduction catalytic activity effect

Active Publication Date: 2022-01-14
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the prior art still lacks a flexible neutral zinc-air battery with high activity and durability using a neutral medium electrolyte

Method used

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  • Flexible neutral zinc air battery and preparation method thereof
  • Flexible neutral zinc air battery and preparation method thereof
  • Flexible neutral zinc air battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A flexible neutral zinc-air battery prepared by the following method:

[0043] (1) ZIF8@ZIF67 was annealed in a tube furnace under an argon atmosphere, and black powder was obtained after holding at 500°C for 3 hours. 0.5M H 2 SO 4 Soak the black powder in the solution for 24 hours to remove excess cobalt species, and dry it to be tested. Weigh an appropriate amount of dried black powder and place it in porcelain boat 1, weigh 1g of sodium hypophosphite and place it in porcelain boat 2, place porcelain boats 1 and 2 in front and back, and pyrolyze sodium hypophosphite in a tube furnace at 500°C for phosphorus Doping to obtain phosphorous doped cobalt nitrogen carbon.

[0044](2) Put 3g of PVA in 24ml of water, heat in an oil bath at 90°C, stir and mix evenly, and stir continuously for 1.5h; weigh 3.8g of ammonium chloride and 1.34g of potassium chloride and dissolve them in 6ml of water to obtain a salt solution, and put the salt solution into In the PVA aqueous sol...

Embodiment 2

[0047] The difference between this embodiment and embodiment 1 is that the non-metal atom doped in step (1) is nitrogen, specifically as follows:

[0048] (1) The obtained purple powder was annealed in a tube furnace under an argon atmosphere, and black powder was obtained after holding at 500° C. for 3 h. 0.5M H 2 SO 4 Soak the black powder in the solution for 24 hours to remove excess cobalt species, and dry it to be tested. Weigh an appropriate amount of dried black powder and place it in porcelain boat 1, weigh 1g of urea and place it in porcelain boat 2, place porcelain boats 1 and 2 in front and back, and pyrolyze urea in a tube furnace at 350°C for nitrogen doping to obtain nitrogen doped Miscellaneous cobalt nitrogen carbon.

Embodiment 3

[0050] The difference between this embodiment and embodiment 1 is that the non-metal atom doped in step (1) is sulfur, specifically as follows:

[0051] (1) The obtained purple powder was annealed in a tube furnace under an argon atmosphere, and black powder was obtained after holding at 500° C. for 3 h. 0.5M H 2 SO 4 Soak the black powder in the solution for 24 hours to remove excess cobalt species, and dry it to be tested. Weigh an appropriate amount of dried black powder and place it in porcelain boat 1, weigh 1 g of thiourea and place it in porcelain boat 2, place porcelain boats 1 and 2 back and forth, pyrolyze thiourea in a tube furnace at 350°C for sulfur doping, and obtain Sulfur-doped cobalt nitrogen carbon.

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Abstract

The invention belongs to the technical field of air batteries, and particularly relates to a flexible neutral zinc air battery and a preparation method thereof. The preparation method comprises the following steps of (1) pyrolyzing a cobalt metal organic framework material coated zinc metal organic framework material ZIF8@ZIF67, and doping nonmetal atoms to obtain nonmetal atom doped porous nitrogen carbon, adding inorganic salt into the polymer aqueous solution, uniformly mixing, and condensing to obtain a solid electrolyte, and (2) assembling the flexible neutral zinc-air battery by taking metal zinc as a negative electrode, the non-metal atom-doped porous nitrogen carbon as a positive electrode and the solid electrolyte as an electrolyte. The porous carbon composite material can be obtained by pyrolyzing and doping the ZIF8@ZIF67 material with the core-shell structure, and the porous carbon composite material has a unique electronic structure and components, so that the porous carbon composite material has higher oxygen reduction and oxygen evolution catalytic activity and excellent stability in a neutral environment.

Description

technical field [0001] The invention belongs to the technical field of air batteries, and in particular relates to a flexible neutral zinc-air battery and a preparation method thereof. Background technique [0002] The specific capacity and energy density of metal-air batteries are generally higher than those of existing batteries, because there is no need to store air inside the batteries, and they are expected to be electrochemical storage systems with high energy density and low cost. Metal-air batteries use pure metal as the anode, external oxygen (O 2 ) redox reaction as the cathodic reaction. During the discharge process, the metal anode is oxidized and the O in the air 2 is restored. Among them, zinc-air batteries (ZABs) have attracted much attention due to their inherent safety, low cost, and high theoretical specific energy density using nonflammable aqueous electrolytes and nontoxic zinc. [0003] Conventional ZABs using alkaline electrolytes are limited by the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M12/06
CPCH01M12/06H01M4/8825H01M4/9041H01M4/9083H01M2300/0091H01M2300/0085
Inventor 夏宝玉何超慧
Owner HUAZHONG UNIV OF SCI & TECH
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