Preparation method of microporous layer in gas diffusion layer

A gas diffusion layer and microporous layer technology, which is applied in electrical components, battery electrodes, circuits, etc., can solve the problems that the single-layer microporous layer cannot meet the function of air conduction and drainage, water flooding, etc., to enhance water management capabilities and The effect of gas diffusivity, improving hydrophobicity, reducing porosity

Inactive Publication Date: 2020-04-10
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the fuel cell, the gas diffusion layer includes a substrate and a microporous layer. The substrate is made of carbon fiber paper. The preparation method of the microporous layer is to apply the slurry to one side of the substrate to form a microporous layer; the current fuel cells are all One side of the substrate is coated

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of microporous layer in gas diffusion layer

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] The invention provides a method for preparing a microporous layer in a gas diffusion layer, such as figure 1 As shown, including the following steps,

[0015] (1) Obtain at least two slurries;

[0016] (2) Choose a slurry to be coated on one side of the substrate q;

[0017] (3) Drying, hot rolling, and sintering the coated slurry in sequence to form a microporous layer;

[0018] (4) Select another slurry and apply the other slurry on the side of the microporous layer away from the substrate q;

[0019] (5) Drying, hot rolling, and sintering another slurry after coating to form another microporous layer;

[0020] (6) Repeat the above steps (4) to (5), and all the microporous layers will be obtained after all the slurry is processed.

[0021] The slurry described in step (1) to step (6) is a mixture of hydrophobic material, conductive carbon black and solvent. The hydrophobic material includes one or more of PTFE, PDDA, PVDF, FEP, and ETFE, conductive carbon black It is one or mor...

Example Embodiment

[0031] Example one:

[0032] A method for preparing a microporous layer in a gas diffusion layer includes the following steps:

[0033] Step (1), weigh 1.75g ​​conductive carbon black (XC-72R from Cabot Corporation, USA), 0.45g TritonX-100, 4.45g ethylene glycol (Shanghai Aladdin company), 0.51g PTFE emulsion (Shanghai Hesen Electric Co., Ltd.) Company), then weigh 13.35g of deionized water into a beaker for ultrasonic dispersion for 30 minutes; stir the mixture obtained after ultrasonic dispersion treatment at 8000 rpm for 60 minutes to obtain microporous layer slurry A, and use a high-speed dispersion machine (Germany IKA company, T25 digital display type);

[0034] Weigh 2.19g conductive carbon black (Cabot Corporation XC-72R), 0.55g Triton X-100, 4.45g ethylene glycol (Shanghai Aladdin Company), 0.91g PTFE emulsion (Shanghai Hesen Electric Co., Ltd.), and then Weigh 13.35g of deionized water into a beaker for ultrasonic dispersion for 30 minutes; stir the mixture obtained after...

Example Embodiment

[0042] Embodiment two:

[0043] A method for preparing a microporous layer in a gas diffusion layer includes the following steps:

[0044] Step (1): Weigh 1.5g conductive carbon black (XC-72R from Cabot Corporation, USA), 0.40g Triton X-100, 3.8g ethylene glycol (Shanghai Aladdin Company), 0.4g PTFE emulsion (Shanghai Hesen Electric Co., Ltd.), and then weigh 12.15g deionized water into a beaker for ultrasonic dispersion for 30 minutes; stir the mixture obtained after ultrasonic dispersion treatment at 8000 rpm for 60 minutes to obtain microporous layer slurry A, and use a high-speed dispersion machine ( German IKA company, T25 digital display type);

[0045] Weigh 2.19g conductive carbon black (Cabot Corporation XC-72R), 0.55g Triton X-100, 4.45g ethylene glycol (Shanghai Aladdin Company), 0.91g PTFE emulsion (Shanghai Hesen Electric Co., Ltd.), and then Weigh 13.35g of deionized water into a beaker for ultrasonic dispersion for 30 minutes; stir the mixture obtained after ultrason...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention relates to the technical field of preparation of microporous layers of fuel cells, and discloses a preparation method of a microporous layer in a gas diffusion layer, which comprises thefollowing steps: (1) obtaining at least two slurries; (2) selecting a slurry to coat one side of the substrate; (3) sequentially carrying out drying, hot pressing and sintering treatment on the coated slurry to form a microporous layer; (4) selecting another slurry and coating the other slurry on one side, far away from the substrate, of the microporous layer; (5) sequentially carrying out drying, hot pressing and sintering treatment on the other coated slurry to form another microporous layer; and (6) repeating the steps (4) to (5), preparing all microporous layers after the slurry is completely treated, and continuously reducing the porosity of the microporous layers along the direction far away from the substrate. The fuel cell provided by the invention cannot be flooded by water.

Description

technical field [0001] The invention relates to the technical field of fuel cell microporous layer preparation, in particular to a method for preparing a microporous layer in a gas diffusion layer. Background technique [0002] In the fuel cell, the gas diffusion layer includes a substrate and a microporous layer. The substrate is made of carbon fiber paper. The preparation method of the microporous layer is to apply the slurry to one side of the substrate to form a microporous layer; the current fuel cells are all One side of the substrate is coated with paste to form a single microporous layer. The thermal battery with this kind of microporous layer has defects. When the fuel cell is working at a high current density, the single-layer microporous layer prepared by the traditional process is difficult to meet its conductivity. The function of air drainage has become more serious. Contents of the invention [0003] The purpose of the present invention is to overcome the a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01M4/88H01M4/86
CPCH01M4/861H01M4/8807Y02E60/50
Inventor 肖飞虎夏丰杰程凤方晓曦李柯
Owner WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap