CN-121994698-A - Method for determining flatness of coated catalyst film (CCM) and method for obtaining CCM

Abstract

The invention discloses a method for obtaining a coated catalyst film (CCM), which comprises the steps of obtaining a friction coefficient of a material to be tested, confirming whether the friction coefficient is between 0.1 and 15, and if so, enabling the material to be tested to be used in a CCM process so as to obtain the CCM.

Inventors

• LI GUANGZHE
• LI JIAHONG
• Cai qunxian

Assignees

• 台湾奈米碳素股份有限公司

Dates

Publication Date

20260508

Application Date

20250716

Priority Date

20241107

Claims (11)

1. 1. A method of determining the flatness of a coated catalyst film (CCM), wherein the CCM comprises a material to be tested, the method comprising: Carrying out friction test on the material to be tested to obtain the friction coefficient of the material to be tested; comparing the coefficient of friction with a predetermined range of 0.1-15, and And judging the flatness of the CCM containing the material to be tested according to the comparison result of the friction coefficient and the preset range, wherein the flatness of the CCM is positively correlated with the friction coefficient of the material to be tested.
2. 2. The method of claim 1, wherein the CCM comprises a polymeric membrane and at least a catalyst layer, and the material to be tested is used in combination with the at least catalyst layer in the CCM.
3. 3. The method of claim 1, wherein the predetermined range is in the range of 1-15.
4. 4. The method of claim 1, wherein the predetermined range is in the range of 5-15.
5. 5. The method of claim 2, further comprising: and carrying out process test on the material to be tested under the condition that the friction coefficient accords with the preset range, wherein the process test comprises the following steps: coating a first catalyst layer on a first surface of the polymer film; disposing the material to be tested on the first catalyst layer; providing pressure to the first catalyst layer provided with the material to be tested, so that the material to be tested is combined with the first catalyst layer; Coating a second catalyst layer on the second surface of the polymer film to obtain a double-sided CCM, and Confirming the flatness of the double-sided CCM.
6. 6. A method of obtaining a coated catalyst film (CCM) having flatness, comprising: Subjecting a material to be tested to a friction test to obtain a friction coefficient of the material to be tested, and And when the friction coefficient is between 0.1 and 15, the material to be tested is used in a CCM process to obtain the CCM, wherein the flatness of the CCM is positively correlated with the friction coefficient of the material to be tested.
7. 7. The method of claim 6, wherein the material to be tested is selected from the group consisting of silica gel, rubber, silicone rubber, polymers, metals, and metal oxides.
8. 8. The method of claim 6, wherein the CCM is a double-sided CCM, the material to be tested being combined with at least a catalyst layer in the double-sided CCM to improve the flatness of the double-sided CCM.
9. 9. The method of claim 6, wherein the CCM process is selected from one of the group consisting of a transfer process, a roll-to-roll (R2R) coating process, a brush coating process, an ultrasonic spray process, and a vacuum adsorption process.
10. 10. A method of obtaining a coated catalyst film (CCM) having flatness, comprising: obtaining the friction coefficient of the material to be tested; Confirming whether the friction coefficient is between 0.1 and 15, and If so, the material to be tested is used in a CCM process to obtain the CCM, wherein the flatness of the CCM is positively correlated with the friction coefficient of the material to be tested.
11. 11. The method of claim 10, wherein the coefficient of friction is obtained by subjecting the material under test to a friction test.

Description

Method for determining flatness of coated catalyst film (CCM) and method for obtaining CCM Technical Field The present invention relates to a method for determining the flatness of a CCM and a method for obtaining a CCM, and more particularly, to a method for obtaining a flat CCM according to the coefficient of friction of a material. Background A fuel cell is an energy conversion device capable of directly converting chemical energy stored in hydrogen fuel and oxidant into electric energy by means of electrochemical reaction. The fuel cell has the characteristics of high energy conversion efficiency, no exhaust emission and the like, is considered as one of the most promising schemes for solving energy crisis and environmental pollution, and has great application prospects in the aspects of transportation (such as automobiles, ships and standby power supplies) and the like. Because of these outstanding features, the development and application of fuel cell technology is being regarded as important by governments and enterprises of various countries. The Catalyst Coated Membrane (CCM) in a fuel cell is one of the important components of the fuel cell, and is mainly prepared by coating catalyst slurry on a polymer membrane and drying to form the CCM. In the case of applying catalyst slurry to both sides of a polymer film, since most of the solvents used for the catalyst are alcohols such as methanol, ethanol, propanol, isopropanol, n-propanol or glycerol, and most of the polymer films are perfluorosulfonic acid films, the polymer films are swelled due to the presence of the alcohol solvents when the catalyst is applied to the polymer films, and the quality of the polymer films is affected. In the existing CCM preparation method, how to ensure the surface uniformity and flatness of CCM has been one of the key research and development technologies in the field. Although CCMs have several manufacturing methods (e.g., transfer, roll-to-roll (R2R) coating, brush coating, ultrasonic spraying, and vacuum adsorption), these methods need to be performed under various process limitations, resulting in respective drawbacks, meaning that this problem is not yet fully solved. In order to solve the problems of CCM swelling and deformation, it is desirable to obtain a flat CCM under the lowest process limit, and the quality of the CCM is effectively improved. Disclosure of Invention The invention provides a method for determining the flatness of a CCM and a method for obtaining the CCM, wherein the friction coefficient of a material to be detected is used as a basis for judging the flatness of the CCM, and the material with high friction coefficient is applied to a CCM process, so that the flat CCM is obtained. In one aspect of the present invention, a method for determining the flatness of a CCM, wherein the CCM comprises a material to be tested, the method comprising performing a friction test on the material to be tested to obtain a friction coefficient of the material to be tested, comparing the friction coefficient with a predetermined range between 0.1 and 15, and determining the flatness of the CCM comprising the material to be tested based on the comparison of the friction coefficient with the predetermined range. In another aspect of the invention, a method of obtaining a CCM is disclosed, comprising subjecting a material to be tested to a friction test to obtain a coefficient of friction of the material to be tested, and applying the material to be tested to a CCM process when the coefficient of friction is between 0.1-15 to obtain the CCM. The invention further discloses a method for obtaining the CCM, which comprises the steps of obtaining a friction coefficient of a material to be tested, confirming whether the friction coefficient is between 0.1 and 15, and enabling the material to be tested to be used in a CCM process so as to obtain the CCM. Drawings The objects and advantages of the present invention will be more fully understood from the following drawings and detailed description, in which: FIG. 1 is a cross-sectional view of a prior art CCM; FIG. 2 is a flow chart of a method for determining the flatness of a CCM according to the present invention; FIG. 3 shows the coefficient of friction versus the flatness of a double-sided CCM for different materials; FIG. 4 is a flow chart of the process test of the present invention, and FIG. 5 is a flow chart of a method of obtaining a CCM in accordance with the present invention. Detailed Description The present invention will be fully understood from the following description of the embodiments, which will be apparent to those skilled in the art from this disclosure, but the invention is not limited to the specific embodiments described below, and other embodiments can be derived by those skilled in the art from the spirit of the embodiments described herein, which fall within the scope of the present invention. Fuel cells typically contain a polymer membrane sa