Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Spinning solution for fuel cell and preparation method of carbon paper of spinning solution

A fuel cell and spinning solution technology, which is applied in the fields of fuel cells, battery electrodes, rayon manufacturing, etc., can solve the problems of high consistency requirements, difficult to disperse evenly, affecting mass transfer, etc., and achieve a simple and controllable preparation process. , cost reduction, good air permeability

Pending Publication Date: 2021-11-23
中汽创智科技有限公司
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the wet papermaking process is relatively mature, the carbon content of carbon fiber is very high, the surface is inert, it is difficult to disperse evenly, and the consistency of forming is very high. The thickness tolerance of paper is relatively large, generally exceeding 10 microns
The consistency of carbon paper will ultimately affect the performance and life of the stack
In addition, the carbon paper prepared by the traditional wet papermaking process is thick, which affects mass transfer and is not conducive to improving the power density of the stack.

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
  • Spinning solution for fuel cell and preparation method of carbon paper of spinning solution
  • Spinning solution for fuel cell and preparation method of carbon paper of spinning solution
  • Spinning solution for fuel cell and preparation method of carbon paper of spinning solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of carbon paper for fuel cells specifically comprises the following steps:

[0037] Step 1, adding 20% ​​polyacrylonitrile, 72% dimethylformamide and dimethyl sulfoxide, 5% dimethyl phthalate and diethyl phthalate to prepare spinning liquid;

[0038] Step 2: Place the steel sheet base 4 in the injection chamber, and set the internal environment of the injection chamber 5: the injection temperature is 50°C, and the injection humidity is 30%; controlling the injection temperature and humidity is conducive to solvent volatilization, fiber formation, and carbon Stable formation of paper porous structure.

[0039] Step 3, the spinning liquid is sprayed from the spinneret 3 through the pressure pump 1 and the meter 2, and sprayed on the steel sheet to form a carbon fiber paper precursor; the discharge rate of the meter is set to 15ml / min. Select the "m"-shaped stroke of the spraying stroke, set the number of spraying layers to 10, and start spraying.

[0040] Th...

Embodiment 2

[0044] Preparation of carbon paper for fuel cells specifically comprises the following steps:

[0045]Step 1, add 25% polyacrylonitrile, 80% sulfolane, ethylene nitrate, sodium thiocyanate, 3% di-n-butyl phthalate, dioctyl phthalate to prepare spinning liquid;

[0046] Step 2. Place a copper sheet in the injection chamber and set the internal environment of the injection chamber: the injection temperature is 60°C, and the injection humidity is 60%; controlling the injection temperature and humidity is conducive to solvent volatilization, fiber formation, and carbon paper porous structure stable formation.

[0047] Step 3, the spinning liquid is sprayed from the spinneret through a pressure pump and a meter, and sprayed on the copper sheet to form a carbon fiber paper precursor; the discharge rate of the meter is set to 10ml / min. Select the "m"-shaped stroke of the spraying stroke, set the number of spraying layers to 15, and start spraying.

[0048] The pressure pump is sel...

Embodiment 3

[0052] Preparation of carbon paper for fuel cells specifically comprises the following steps:

[0053] Step 1, add 40% polyacrylonitrile, 84% sulfolane, ethylene nitrate, sodium thiocyanate, 6% dimethyl phthalate, butyl benzyl phthalate to prepare spinning liquid ;

[0054] Step 2. Place an iron sheet in the injection chamber and set the internal environment of the injection chamber: the injection temperature is 40°C, and the injection humidity is 40%; controlling the injection temperature and humidity is conducive to solvent volatilization, fiber formation, and carbon paper porous structure stable formation.

[0055] Step 3, the spinning liquid is sprayed from the spinneret through a pressure pump and a meter, and sprayed on the iron sheet to form a carbon fiber paper precursor; the discharge rate of the meter is set to 8ml / min.

[0056] Select the "m"-shaped stroke of the spraying stroke, set the number of spraying layers to 11, and start spraying.

[0057] The pressure p...

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
Diameteraaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a spinning solution for a fuel cell and a preparation method of carbon paper of the spinning solution, and belongs to the technical field of carbon paper preparation. The spinning solution comprises raw materials, a solvent and an auxiliary; the mass ratio of the raw material to the solvent to the auxiliary agent is (20-50): (60-100): (1-5); the raw material comprises polyacrylonitrile; the solvent comprises one or more of dimethyl amide, dimethyl sulfoxide, sodium thiocyanate or zinc chloride; and the auxiliary agent comprises one or more of dimethyl phthalate, diethyl phthalate, di-n-butyl phthalate, dioctyl phthalate or butyl benzyl phthalate. The spinning liquid is jetted on a substrate by jet spinning to form organic cellosilk firstly and then form the carbon fiber paper. The carbon fiber paper with good thickness consistency prepared by the method has good capability of conducting electrons, water and gas, in addition, the preparation process is simple and controllable, the cost is reduced, and batch production can be realized.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, in particular to a method for preparing carbon paper in a gas diffusion layer for fuel cells. Background technique [0002] Fuel cell is a high-efficiency power generation device, and the product only generates water, which is a very promising clean energy source. Fuel cells are used in a wide range of applications, from civilian to military, from small portable devices to large aerospace, automobiles and ships. Among them, the proton exchange membrane fuel cell is developing rapidly. The membrane electrode (MEA, Membrane Electrode Assembly) is the core component of the proton exchange membrane fuel cell and also the core component of power generation in the stack. The membrane electrode and the bipolar plates on both sides form the fuel cell The basic unit of a fuel cell is a fuel cell, which consists of a pole plate, a gas diffusion layer, a catalytic layer, and a proton exchange membrane. ...

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): H01M8/0234H01M4/88D06C7/04D04H1/43D01F9/22D01F1/10
CPCH01M8/0234H01M4/8807D04H1/43D06C7/04D01F9/22D01F1/10Y02E60/50Y02P70/50
Inventor 李丰军周剑光张运搏苏建敏漆海龙
Owner 中汽创智科技有限公司
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More