Structure of cathode electrode for fuel cell
AssigneeSamsung SDI Co., Ltd.
InventorsSeung-jae Lee, Ji-rae Kim, Yoon-hoi Lee
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Abstract
A structure of a cathode electrode for a fuel cell includes a catalyst layer formed by mixing a carbon material with a catalyst material and a hydrophilic ion conductive material. The hydrophilic ion conductive material is embedded on the catalyst layer and contacts an electrolyte membrane and a diffusion layer to provide a migration path for water and hydrogen ions.
Claims14
A cathode electrode structure that contacts an electrolyte membrane and comprises a catalyst layer, a diffusion layer, and a electrode supporting layer sequentially stacked, wherein:
- the catalyst layer is formed by mixing a carbon material with a catalyst material and a hydrophilic ion conductive material,
- the hydrophilic ion conductive material is located across the catalyst layer along a thickness direction of the catalyst layer and contacts the electrolyte membrane and the diffusion layer to provide a migration path for water and hydrogen ions, and
- the hydrophilic ion conductive material is formed of one selected from the group consisting of phosphate doped by SnP2O7, a NH4PO3/TiP2O7 composite, phosphate derived-hydrogel, phosphosilicate gel-polyimide composite, Zr tricarboxybutyl-phosphate/polyimide composite, phosphosilicate gel-polyimide composite, solid acid Cs5H3(SO4)4, and hetero-acid H3PW12O40/poly styrene sulfonic acids (PSS).
A fuel cell comprising a cathode electrode, the cathode electrode having a structure that contacts an electrolyte membrane and comprises a catalyst layer, a diffusion layer, and a electrode supporting layer sequentially stacked, wherein:
- the catalyst layer is formed by mixing a carbon material with a catalyst material and a hydrophilic ion conductive material,
- the hydrophilic ion conductive material is located across the catalyst layer along a thickness direction of the catalyst layer and contacts the electrolyte membrane and the diffusion layer to provide a migration path for water and hydrogen ions, and
- the hydrophilic ion conductive material is formed of one selected from the group consisting of phosphate doped by SnP2O7, a NH4PO3/TiP2O7 composite, phosphate derived-hydrogel, phosphosilicate gel-polyimide composite, Zr tricarboxybutyl-phosphate/polyimide composite, phosphosilicate gel-polyimide composite, solid acid Cs5H3(SO4)4, and hetero-acid H3PW12O40/poly styrene sulfonic acids (PSS).
A cathode electrode contacting an electrolyte membrane, the cathode electrode comprising a catalyst layer, a diffusion layer, and an electrode supporting layer sequentially stacked, wherein:
- the catalyst layer is formed by mixing a carbon material with a catalyst material and a hydrophilic ion conductive material,
- the hydrophilic ion conductive material forms a plurality of members spaced apart from each other and embedded in the catalyst layer and contact the electrolyte membrane and the diffusion layer to provide a migration path for water and hydrogen ions,
- each of the plurality of members is located across the catalyst layer along a thickness direction of the catalyst layer, and
- the hydrophilic ion conductive material is formed of one selected from the group consisting of phosphate doped by SnP2O7, a NH4PO3/TiP2O7 composite, phosphate derived-hydrogel, phosphosilicate gel-polyimide composite, Zr tricarboxybutyl-phosphate/polyimide composite, phosphosilicate gel-polyimide composite, solid acid Cs5H3(SO4)4, and hetero-acid H3PW12O40/poly styrene sulfonic acids (PSS).
Dependencies are inferred from the claim text.