Preparation method of waterproof breathable film, waterproof breathable film and application

A waterproof breathable film and film technology, which is applied in the preparation of waterproof breathable film, waterproof breathable film and application fields, can solve the problems of low waterproof performance or toughness, low battery discharge voltage, poor heat dissipation performance, etc., and achieve uniform distribution and ventilation. Strong performance, good for gas phase transmission

Active Publication Date: 2021-08-17
郑州佛光发电设备股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, low air permeability leads to low battery discharge voltage, low waterproof performance or toughness leads to liquid leakage, poor heat dissipation performance leads to heat accumulation and causes battery thermal runaway, etc.

Method used

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  • Preparation method of waterproof breathable film, waterproof breathable film and application
  • Preparation method of waterproof breathable film, waterproof breathable film and application
  • Preparation method of waterproof breathable film, waterproof breathable film and application

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Embodiment 1

[0031] Table 1 Distribution ratio (mass ratio) of each component of waterproof and breathable membrane

[0032] components Conductive carbon black PTFE Metal Copper Powder ammonium bicarbonate polystyrene emulsion Absolute ethanol Proportion 300 925 375 405 750 Appropriate amount

[0033] Step 1, weigh each component according to the above mass ratio, add an appropriate amount of absolute ethanol to the conductive carbon black, metal copper powder and ammonium bicarbonate micropowder, and stir fully to ensure that the three materials can be mixed evenly, and neither It will float in the form of tiny particles; then add PTEF (polytetrafluoroethylene) to the mixture, PTEF is added one by one, and while adding, it is accompanied by stirring; then add the reinforcing agent polystyrene emulsion, stir at any time during the addition, and stir until homogeneous paste;

[0034] During the stirring process, always pay attention to the shape of the...

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Abstract

The invention discloses a preparation method of a waterproof breathable film, the waterproof breathable film and application. The preparation method comprises the following steps: step 1, uniformly mixing a conductive carbon material, a heat-conducting material and a pore-forming agent, then adding PTFE emulsion, a reinforcing agent and a solvent, and stirring to obtain paste; step 2, allowing the paste obtained in the step 1 to be subjected to multiple times of roll forming to prepare a thin film; step 3, heating the film obtained in the step 2 at 180-280 DEG C for 3-5 hours; step 4, soaking the film cooled in the step 3 in clear water for 8-12 hours; and step 5, taking out the film in the step 4, and airing to obtain the waterproof breathable film. The waterproof breathable film prepared by the invention is applied to an aluminum air battery as a constituent part of an air electrode. The prepared waterproof breathable film is high in breathability, high in flexibility, good in alkali corrosion resistance and excellent in heat dissipation performance.

Description

technical field [0001] The invention relates to the technical field of fuel cell cathode material preparation, in particular to a preparation method of a waterproof and breathable membrane, a waterproof and breathable membrane and an application thereof. Background technique [0002] With the depletion of non-renewable energy sources such as fossil energy and the increasingly serious environmental pollution problems in our country, the development and use of new energy technologies without pollution is the general trend of the entire social environment. Aluminum-air batteries came into being on this basis. The theoretical specific energy and discharge capacity of aluminum-air batteries are very high, and the resources of aluminum metal are more abundant and cheap, so aluminum-air batteries have a wider range of applications. application prospects. [0003] The air electrode is a key component of the aluminum-air battery, and its performance is crucial to the discharge perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M12/06
CPCH01M4/8807H01M12/06H01M2004/8689Y02E60/50
Inventor 雷红红王瑞智白啸李荣荣李小丽
Owner 郑州佛光发电设备股份有限公司
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