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A flexible and bendable air cathode and its preparation method

An air cathode and bending technology, applied in the direction of electrical components, battery electrodes, structural parts, etc., can solve the problems of poor service life, poor corrosion resistance of air cathode, and low degree of freedom of cathode bending, so as to prolong the service life and mechanical strength Good, the effect of improving electron conductivity

Active Publication Date: 2021-03-19
NINGBO GRAPHENE INNOVATION CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the prior art, the object of the present invention is to provide a flexible and bendable air cathode to solve the problems of poor corrosion resistance, poor service life and low degree of freedom of the cathode prepared by the existing method.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Hydrophobic layer preparation: Take 10g camphor, 10g activated carbon, 20g carbon fiber, 40g polyvinylidene fluoride PVDF, 20g polytetrafluoroethylene PTFE, set aside; grind camphor and activated carbon into powder, add appropriate amount of alcohol and stir for 1h to disperse, disperse After uniformity, add PVDF and PTFE, add a small amount of water, stir until it becomes viscous, add carbon fiber, continue stirring until the mixture is a malleable mass, and then roll it into a sheet. Put it in an oven at 60°C, and bake it for 0.5h, and it is in a semi-dry state.

[0046] (2) Catalyst layer preparation: get 40g catalyst, 5g graphene, 40g expanded graphite, 15g polytetrafluoroethylene and prepare for later use; mix catalyst, graphene and expanded graphite and add appropriate amount of alcohol and stir for 1h to disperse, and then add PTFE after the dispersion is even. Add a small amount of water and continue stirring until the mixture is a malleable mass, which is t...

Embodiment 2

[0050] (1) Hydrophobic layer preparation: Take 10g borneol, 10g activated carbon, 20g carbon fiber, 40g polyvinylidene fluoride PVDF, 20g polytetrafluoroethylene PTFE, set aside, grind borneol and activated carbon into powder, add appropriate amount of alcohol and stir for 3h to disperse After dispersing evenly, add PVDF and PTFE, add a small amount of water, stir until it becomes viscous, add carbon fiber, continue stirring until the mixture is a malleable mass, and then roll it into a sheet. Put it in an oven at 70°C and bake for 0.4h, and it is in a semi-dry state.

[0051] (2) Catalyst layer preparation: take 40g catalyst, 5g graphene, 40g expanded graphite, 15g polytetrafluoroethylene, set aside; mix catalyst, graphene and expanded graphite and add appropriate amount of alcohol and stir for 3h to disperse, after the dispersion is uniform, add PTFE, add little water, stirring continuously until the mixture is a malleable mass, which is then rolled into sheets. Put it in a...

Embodiment 3

[0055] (1) Hydrophobic layer preparation: take 10g camphor, 10g activated carbon, 20g graphite wire, 40g polyvinylidene fluoride PVDF, 20g polytetrafluoroethylene PTFE, set aside, grind camphor and activated carbon into powder, add appropriate amount of alcohol and stir for 1h to disperse, After the dispersion is uniform, add PVDF and PTFE, add a small amount of water, stir until the viscous shape is added to the graphite thread, continue to stir until the mixture is a malleable mass, and then roll it into a sheet. Put it in an oven at 40°C and bake for 1 hour, and it is in a semi-dry state.

[0056] (2) Catalytic layer preparation: take 40g catalyst, 5g graphene, 40g expanded graphite, and 15g polytetrafluoroethylene for later use; mix the catalyst, graphene and expanded graphite with appropriate amount of alcohol and stir for 3 hours to disperse, after the dispersion is uniform, add PTFE, and add a small amount water, stirring continuously until the mixture is a malleable ma...

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PUM

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Abstract

The embodiment of the invention relates to a flexible bendable air cathode and a preparation method thereof. The flexible bendable air cathode comprises a hydrophobic layer and a catalyst layer. A protection layer is disposed outside the catalyst layer. The hydrophobic layer, the catalyst layer and the protection layer are stacked. According to the present invention, the hydrophobic layer provideseffects of current guiding, oxygen conduction and flexibility increasing, and the protection layer is additionally arranged outside the catalyst layer so as to protect the catalyst layer and achievethe purpose of prolonging the service life.

Description

technical field [0001] The invention relates to a metal-air battery, in particular to a flexible and bendable air cathode and a preparation method thereof. Background technique [0002] A metal-air battery is an electrochemical reaction device consisting of three parts: a metal anode, an air cathode, and an electrolyte solution. Metal anodes usually use metal materials with relatively negative electrode potential, such as magnesium, aluminum, zinc, cadmium, iron, etc., and the electrolyte solution is usually lye or neutral saline solution. The air cathode is the core component of the battery, where the direct use of oxygen in the air is used as the oxidant for the oxygen reduction reaction. [0003] Although the existing air cathode structures are different, most of them are composed of hydrophobic layer / collecting layer / catalytic layer. The hydrophobic layer plays the role of waterproof and breathable on the outermost side, and the collecting layer plays a breathable role ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/88
CPCY02E60/50
Inventor 李怀宇薛业建刘兆平董正豪刘素娟
Owner NINGBO GRAPHENE INNOVATION CENT CO LTD
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