Cathode catalyst layer and preparation method and use thereof, and fuel cell
Provided are a cathode catalyst layer and a preparation method and use thereof, and a fuel cell. The method includes: mixing a catalyst, water, and an alcohol with a pore-forming agent to obtain a mixture; dispersing the mixture into a Nafion solution to obtain a slurry; and coating the slurry onto a surface of a diffusion layer to obtain a coated diffusion layer, and subjecting the coated diffusion layer to calcination and freeze-drying in sequence to obtain the cathode catalyst layer.
1 . A method for preparing a cathode catalyst layer, comprising the following steps:
mixing a catalyst, water, and an alcohol with a pore-forming agent to obtain a mixture;
dispersing the mixture into a Nafion solution to obtain a slurry; and
coating the slurry onto a surface of a diffusion layer to obtain a coated diffusion layer, and subjecting the coated diffusion layer to calcination and freeze-drying in sequence to obtain the cathode catalyst layer.
2 . The method of claim 1 , wherein the pore-forming agent comprises one or more selected from the group consisting of ammonium oxalate, ammonium carbonate, and ammonium nitrate.
3 . The method of claim 2 , wherein the pore-forming agent has a particle size of 35 nm to 45 nm.
4 . The method of claim 1 , wherein the pore-forming agent has a particle size of 35 nm to 45 nm.
5 . The method of claim 4 , wherein the pore-forming agent has a mass 1 to 2 times that of the catalyst.
6 . The method of claim 1 , wherein the pore-forming agent has a mass 1 to 2 times that of the catalyst.
7 . The method of claim 1 , wherein the freeze-drying is conducted at a temperature of −40° C. to −10° C. for 40 min to 60 min.
8 . The method of claim 1 , wherein the catalyst is selected from the group consisting of Pt/C, Pt—Co/C, Pt—Ni/C, and Pt—Ru/C.
9 . The method of claim 1 , wherein the calcination is conducted at a temperature of 120° C. to 150° C. for 3 h to 5 h.
10 . A cathode catalyst layer prepared by the method of claim 1 , wherein the cathode catalyst layer has a mesoporous structure with a pore size of 5 nm to 40 nm.
11 . The cathode catalyst layer of claim 10 , wherein the pore-forming agent comprises one or more selected from the group consisting of ammonium oxalate, ammonium carbonate, and ammonium nitrate.
12 . The cathode catalyst layer of claim 10 , wherein the pore-forming agent has a particle size of 35 nm to 45 nm.
13 . The cathode catalyst layer of claim 10 , wherein the pore-forming agent has a mass 1 to 2 times that of the catalyst.
14 . The cathode catalyst layer of claim 10 , wherein the catalyst is selected from the group consisting of Pt/C, Pt—Co/C, Pt—Ni/C, and Pt—Ru/C.
15 . A fuel cell, comprising a membrane electrode, an end plate, a bipolar plate, and a sealing element, wherein the membrane electrode is prepared by hot-laminating the cathode catalyst layer of claim 10 , an anode catalyst layer, and a proton exchange membrane.
16 . The fuel cell of claim 15 , wherein the pore-forming agent comprises one or more selected from the group consisting of ammonium oxalate, ammonium carbonate, and ammonium nitrate.
17 . The fuel cell of claim 15 , wherein the pore-forming agent has a particle size of 35 nm to 45 nm.
18 . The fuel cell of claim 15 , wherein the pore-forming agent has a mass 1 to 2 times that of the catalyst.
19 . The fuel cell of claim 15 , wherein the catalyst is selected from the group consisting of Pt/C, Pt—Co/C, Pt—Ni/C, and Pt—Ru/C.