CN100593051C - Functional carbon paper material with different hydrophilic and hydrophobic property on two sides - Google Patents
Functional carbon paper material with different hydrophilic and hydrophobic property on two sides Download PDFInfo
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- CN100593051C CN100593051C CN02116609A CN02116609A CN100593051C CN 100593051 C CN100593051 C CN 100593051C CN 02116609 A CN02116609 A CN 02116609A CN 02116609 A CN02116609 A CN 02116609A CN 100593051 C CN100593051 C CN 100593051C
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Abstract
The functional carbon paper is prepared through first preparation of two kinds of carbon paper pulp with different composition and different hydrophobic property, twice pulp filtering, pressing to form and post-treatment. The functional carbon paper with different hydrophilic and hydrophobic property is suitable for use as the electrode diffusion layer material in proton exchange membrane fuel cell. The use of the carbon paper needs no complex post-treatment. The production process is simple and uses cheap material. In addition, grahpite and other matter may be added during the preparation tomake the carbon paper possess excellent conductivity and proper porosity.
Description
Technical field
The present invention relates to a kind of carbon paper material and preparing technical field thereof, a kind of specifically function carbon paper that is applicable to the requirement of proton exchange membrane fuel cell electrode diffusion layer and preparation method thereof with good electric chemical property.
Background technology
The selection of proton exchange membrane fuel cell electrode diffusion layer material has crucial influence to the chemical property of electrode and battery.Usually proton exchange membrane fuel cell electrode is made up of diffusion layer and Catalytic Layer, electrode diffusion layer provides reacting gas, electron stream and discharge to generate the passage of water on the one hand, support the Catalytic Layer network on the other hand, be the important building material of forming electrode-membrane-electrode three in one membreane electrode assembly, its character depends primarily on selected material.
The material that is used for the proton exchange membrane fuel cell electrode diffusion layer both at home and abroad at present mainly is a carbon paper.And the carbon paper that conventional art is made needs just can make the two sides of carbon paper have different hydrophilic and hydrophobic energy, to satisfy the function that carbon paper has directional transmissions gas, liquid in use through complicated last handling process during as electrode diffusion layer.
Summary of the invention
The object of the present invention is to provide a kind of new method of proton exchange membrane fuel cell electrode diffusion layer carbon paper preparation.The characteristics of this method are to prepare the carbon paper slurries of at first preparing two kinds of different compositions and hydrophobic performance in the carbon paper process, adopt twice filter pulp then, compression moulding is handled, the two sides has the different hydrophilic and hydrophobic energy after making its moulding, the last handling process of complexity when this process has avoided common carbon paper to use.The selected raw material of carbon paper of this method preparation is cheap and easy to get, and technological process is simple.In preparation process, pass through to add materials such as graphite powder simultaneously, make carbon paper that good electrical conductivity and suitable porosity be arranged.
Technical scheme of the present invention is: the carbon paper of preparation is made up of two-layer.Wherein one deck is made up of 0-20% cellulose slurry, 60-99% carbon fiber and 0-20% graphite powder and a spot of adhesive; Another layer then is made up of 0-20% cellulose slurry, 40-97% carbon fiber, 0-20% graphite powder and 2-20% mineral fibres and a spot of adhesive.To copy the two-layer carbon fiber paper compression moulding that the paper technology is copied system by wet method, high temperature cabonization is handled and is obtained function carbon paper of the present invention again.
Other technologies scheme provided by the invention is: carbon fiber can be polyacrylonitrile-based carbon fibre, asphalt base carbon fiber etc.
The optional wood pulp of cellulose slurry, cotton pulp etc.
Mineral fibres can be glass fibre or asbestos fibre etc.
The invention provides a kind of suitable preparation method who makes proton exchange membrane fuel cell electrode diffusion layer carbon paper, comprise the following steps: successively
A. prepare the aqueous dispersant of 0.05-1%, make carbon fiber in aqueous dispersant, disperse making beating then, make beating degree and be 2-60 ° carbon fiber slurry;
B. cellulose is disperseed making beating, make beating degree and be 2-60 ° paper pulp;
C. carbon fiber slurry, paper pulp and graphite powder are mixed by a certain percentage, add a certain amount of pore creating material solution and adhesive, put into mixer and mix stirring, promptly obtain the papermaking mixed slurry;
D. the wet papermaking technology is copied the paper moulding with the papermaking mixed slurry routinely;
E. prepare another layer carbon paper slurry by above-mentioned steps, adding beating degree in preparation slurry process is 2-60 ° of treated mineral fibres, makes its content in the 2-20% scope;
F. with two-layer carbon paper compound suppressing, drying;
G. with the fibrous paper carbonization treatment of compound suppressing moulding, carburizing temperature is 500-2200 ℃, promptly gets the function carbon paper of the present invention's preparation after the carbonization treatment.
The present invention also provides following method:
The processing of step a mineral fibres adds the organic matter and the graphite powder mixing 1h of an amount of concentration.
The mineral fibres of step b prescinds in the 1-15mm scope, is preferable selection with 1-10mm.
The Proton Exchange Membrane Fuel Cells diffusion layer carbon paper of the present invention's preparation, the two sides has different hydrophilic and hydrophobic energy.Though in preparation process, added mineral fibres, do not influence its electric conductivity by certain processing and control making beating, have excellent electrochemical properties after tested.It is poor that it has obviously overcome the used carbon paper pliability of present proton exchange membrane fuel cell electrode diffusion layer, and need during assembled battery complicated make its two sides have different hydrophilic and hydrophobics can the post-processing operation process.
Proton exchange membrane fuel cell electrode diffusion layer provided by the invention is to be matrix with native cellulose pulp and carbon fiber, regulate material with graphite powder double as conductive phase and hole, add other auxiliary agents such as an amount of dispersant and pore creating material, two-layer repressed moulding after the moulding of wet papermaking technology is made after carbonization treatment again.Wherein one deck need add treated mineral fibres.
The present invention has following characteristics:
1. the invention provides a kind of new preparation performance function carbon paper process.The carbon paper of preparation is made up of the two-layer carbon paper of forming, performance is different, the hydrophilic hydrophobic performance difference in the carbon paper two sides that makes, the suitable diffusion layer of making proton exchange membrane fuel cell electrode.
The selected mineral fibres of the present invention be easy to get, inexpensive, and intensity is big, the carbon paper intensity height of preparation, and pliability is good.
3. add an amount of pore creating material and graphite powder in paper-making process, the fine microcellular structure that improves paper of energy has gas permeability and porosity preferably;
4. when the present invention has avoided carbon paper to make electrode diffusion layer, make its two sides have the last handling process of different hydrophilic and hydrophobic energy.
The specific embodiment
The invention provides following example, describe the present invention.
The suitable function carbon paper of making the proton exchange membrane fuel cell electrode diffusion layer wherein one deck contains softwood pulp 15%, asphalt base carbon fiber 74%, graphite powder 10%, dispersant and other auxiliary agents 1%.Another layer contains softwood pulp 10%, and asphalt base carbon fiber is 70%, and graphite powder is 9%, glass fibre 10%, and dispersant and other auxiliary agents 1% are copied letterweight through wet method and are made type, at 1100 ℃ of carbonization 2h.Porosity is 75%, and direction 0.04 Ω .cm in the specific insulation face can compare favourably with the carbon paper performance (direction 0.02 Ω .cm in the specific insulation face) that SGL company produces, and carbon paper voidage of the present invention can be regulated as required.
Claims (7)
- A two sides have different hydrophilic and hydrophobic can the function carbon paper, its suitable proton exchange membrane fuel cell electrode diffusion layer material of doing, it is characterized in that described function carbon paper by two-layer carbon paper compacting composite molding after the moulding of wet papermaking technology, wherein one deck is made up of 15-20% cellulose slurry, 60-99% carbon fiber and 10-20% graphite powder and a little binder; Another layer is made up of 10-20% cellulose slurry, 40-97% carbon fiber, 9-20% graphite powder and 2-20% mineral fibres and a spot of adhesive; After carbonization treatment, make again after the moulding.
- 2. function carbon paper according to claim 1 is characterized in that described carbon fiber is polyacrylonitrile-based carbon fibre, asphalt base carbon fiber.
- 3. function carbon paper according to claim 1 is characterized in that described mineral fibres is glass fibre or asbestos fibre; Mineral fibres can directly use, and also can use activated processing back.
- 4. function carbon paper according to claim 1 is characterized in that described cellulose slurry is wood pulp, cotton pulp.
- 5. function carbon paper according to claim 1 is characterized in that described mineral fibres length is 1-15mm.
- 6. the preparation method of the described function carbon paper of one of claim 1-5 comprises the following steps: successivelyA. prepare the aqueous dispersant of 0.05-1%, make carbon fiber in aqueous dispersant, disperse making beating then, make beating degree and be 2-60 ° carbon fiber slurry;B. cellulose is disperseed making beating, make beating degree and be 2-60 ° paper pulp;C. carbon fiber slurry, paper pulp and graphite powder are mixed by a certain percentage, add a certain amount of pore creating material solution and adhesive, put into mixer and mix stirring, promptly obtain the papermaking mixed slurry;D. the wet papermaking technology is copied the paper moulding with the papermaking mixed slurry routinely;E. prepare another layer carbon paper slurry by above-mentioned steps, adding beating degree in preparation slurry process is 2-60 ° of treated mineral fibres, makes its content in the 2-20% scope;F. with two-layer carbon paper compound suppressing, drying;G. with the fibrous paper carbonization treatment of compound suppressing moulding, carburizing temperature is 500-2200 ℃, promptly gets the function carbon paper after the carbonization treatment.
- 7. preparation method according to claim 6 is characterized in that: the concentration of the mixed serum of step c and e in aqueous dispersant is 0.1-4wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02116609A CN100593051C (en) | 2002-04-11 | 2002-04-11 | Functional carbon paper material with different hydrophilic and hydrophobic property on two sides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02116609A CN100593051C (en) | 2002-04-11 | 2002-04-11 | Functional carbon paper material with different hydrophilic and hydrophobic property on two sides |
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| Publication Number | Publication Date |
|---|---|
| CN1378014A CN1378014A (en) | 2002-11-06 |
| CN100593051C true CN100593051C (en) | 2010-03-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN02116609A Expired - Fee Related CN100593051C (en) | 2002-04-11 | 2002-04-11 | Functional carbon paper material with different hydrophilic and hydrophobic property on two sides |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318696C (en) * | 2004-08-20 | 2007-05-30 | 中国科学院山西煤炭化学研究所 | Carbon fibre paper and its mfg. method |
| CN1318697C (en) * | 2004-08-20 | 2007-05-30 | 中国科学院山西煤炭化学研究所 | Carbon fibre paper and its mfg. method |
| CN107039192B (en) * | 2016-02-02 | 2019-04-26 | 昆明纳太科技有限公司 | The different Buckie paper of two sides hydrophobe, preparation method and applications |
| CN106012678B (en) * | 2016-06-07 | 2018-06-05 | 青岛大学 | A kind of technique for preparing the compound carbon paper of cobaltous selenide |
| CN108470632A (en) * | 2018-04-17 | 2018-08-31 | 深圳江浩电子有限公司 | A kind of paper substrate electrode and preparation method thereof for ultracapacitor |
| CN110485191A (en) * | 2019-08-16 | 2019-11-22 | 中国海诚工程科技股份有限公司 | Wet process is manufactured paper with pulp gas diffusing layer of fuel cell electrode carbon fiber paper and preparation method thereof |
| CN113555563B (en) | 2021-05-31 | 2022-07-08 | 东华大学 | Gas diffusion layer for proton exchange membrane fuel cell and preparation method thereof |
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2002
- 2002-04-11 CN CN02116609A patent/CN100593051C/en not_active Expired - Fee Related
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