Method for preventing pore passages from being flooded with water in catalyst layer of fuel cell
A fuel cell and catalytic layer technology, applied to battery electrodes, circuits, electrical components, etc., can solve problems such as voltage loss, blockage, and inability to effectively protect micropores, so as to improve activity and stability and prevent flooding
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[0017] Example 1
[0018] The molecular weight of dimethyl silicone oil is 9.4k; the viscosity is 200cp, which is used to prepare Fe / N / C ink;
[0019] Add simethicone (9.4kD, 200cp) to the cathode ink, the ink composition is: Fe / N / C catalyst 25mg; simethicone (9.4kD, 200cp) 50mg; 5wt% nafion solution 0.55mL; different solvents 1 mL of propanol; place the cathode ink in an ice-water bath and sonicate until it is uniformly dispersed; prepare the gas diffusion electrode (GDS) by drip coating, and the final cathode catalyst load is 5mgcm -2 ;
[0020] The preparation method of the anode gas diffusion electrode is similar to that of the cathode. The ink composition is Pt-Ru / C (40wt%Ptand20wt%Ru, JohnsonMatthey)-20mg; 5wt% nafion solution 0.22mL; deionized water 0.2mL; isopropanol 0.4mL; Place the cathode ink in an ice-water bath and ultrasonic for 10 minutes; prepare the gas diffusion electrode (GDS) by drip coating, and the final anode metal load is 4mgcm -2 ;
[0021] The prepared gas d...
Example Embodiment
[0022] Example 2
[0023] The molecular weight of dimethyl silicone oil is 28k; the viscosity is 1000cp, which is used to prepare Fe / N / C ink;
[0024] Add dimethyl silicone oil (28kD, 1000cp) to the cathode ink, the ink composition is: Fe / N / C catalyst 25mg; dimethyl silicone oil (28kD, 1000cp) 50mg; 5wt% nafion solution 0.55mL; solvent isopropanol 1mL; The cathode ink is placed in an ice water bath and sonicated until it is uniformly dispersed; the gas diffusion electrode (GDS) is prepared by drip coating, and the final cathode catalyst loading is 5mgcm -2 ;
[0025] The preparation method of the anode gas diffusion electrode is similar to that of the cathode. The ink composition is Pt-Ru / C (40wt%Ptand20wt%Ru, JohnsonMatthey)-20mg; 5wt% nafion solution 0.22mL; deionized water 0.2mL; isopropanol 0.4mL; Place the cathode ink in an ice-water bath and ultrasonic for 10 minutes; prepare the gas diffusion electrode (GDS) by drip coating, and the final anode metal load is 4mgcm -2 ;
[0026...
Example Embodiment
[0027] Example 3
[0028] The molecular weight of F modified silicone oil is 30k; the viscosity is 1500cp, which is used to prepare Fe / N / C ink;
[0029] Add F modified silicone oil (30kD, 1500cp) to the cathode ink. The ink composition is: Fe / N / C catalyst 25mg; F modified silicone oil (30kD, 1500cp) 50mg; 5wt% nafion solution 0.55mL; solvent n-propanol 1mL; The cathode ink is placed in an ice water bath and sonicated until it is uniformly dispersed; the gas diffusion electrode (GDS) is prepared by drip coating, and the final cathode catalyst loading is 5mgcm -2 ;
[0030] The preparation method of the anode gas diffusion electrode is similar to that of the cathode. The ink composition is Pt-Ru / C (40wt%Ptand20wt%Ru, JohnsonMatthey)-20mg; 5wt% nafion solution 0.22mL; deionized water 0.2mL; isopropanol 0.4mL; Place the cathode ink in an ice-water bath and ultrasonic for 10 minutes; prepare the gas diffusion electrode (GDS) by drip coating, and the final anode metal load is 4mgcm -2 ;
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