Proton-Conducting Electrolytes for Solid Oxide Fuel Cell Applications

Materials with the CrVO4 structure type as candidate superprotonic conductors

“…Proton-conducting solids are used in a variety of applications, including as hydrogen separation membranes in chemical processing [1][2][3][4][5][6][7][8][9][10][11] and in electrodes or electrolytes in solid oxide fuel cells [12][13][14][15][16][17][18][19][20][21] and electrolyzers. [22][23][24][25][26] There is particular interest in using proton-conducting oxides as electrolytes and electrode materials in fuel cells, where an electrolyte must be electronically insulating but an electrode material may be a mixed ionicelectronic conductor.…”

“…22,[29][30][31][32] As protons are smaller than oxygen ions and carry half the electronic charge, they tend to diffuse more readily than oxygen ions; thus a promising route to improving the rate capability (and lowering the operating temperature) of solid oxide fuel cells is to use proton-conducting oxides as electrolytes and electrode materials. [12][13][14][15][16][17][18][19][20][21] Fuel cells with protonconducting electrolytes have additional advantages in that the reaction products are produced at the cathode, rather than the anode, so they are kept separate from the fuel, which can result in gains in efficiency. 13,14 For fuel cells that use ammonia as a fuel, the use of proton-conducting electrolytes prevents the formation of NO, an unwanted byproduct.…”

Materials with the CrVO4 Structure Type as Candidate Superprotonic Conductors

“…Proton-conducting solids are used in a variety of applications, including as hydrogen separation membranes in chemical processing 1-11 and in electrodes or electrolytes in solid oxide fuel cells [12][13][14][15][16][17][18][19][20][21] and electrolyzers. [22][23][24][25][26] There is particular interest in using proton-conducting oxides as electrolytes and electrode materials in fuel cells, where an electrolyte must be electronically insulating but an electrode material may be a mixed ionic-electronic conductor.…”

“…22,[29][30][31][32] As protons are smaller than oxygen ions and carry half the electronic charge, they tend to diffuse more readily than oxygen ions; thus a promising route to improving the rate capability (and lowering the operating temperature) of solid oxide fuel cells is to use proton-conducting oxides as electrolytes and electrode materials. [12][13][14][15][16][17][18][19][20][21] Fuel cells with proton-conducting electrolytes have additional advantages in that the reaction products are produced at the cathode, rather than the anode, so they are kept separate from the fuel, which can result in gains in efficiency. 13,14 For fuel cells that use ammonia as a fuel, the use of proton-conducting electrolytes prevents the formation of NO, an unwanted byproduct.…”

Materials with the CrVO4 Structure Type as Candidate Superprotonic Conductors

“…20,[26][27][28][29] As protons are smaller than oxygen ions and carry half the electronic charge, they tend to diffuse more readily than oxygen ions; thus a promising route to improving the rate capability (and lowering the operating temperature) of solid oxide fuel cells is to use proton-conducting oxides as electrolytes and/or electrode materials. [10][11][12][13][14][15][16][17][18][19] Fuel cells with proton-conducting electrolytes have additional advantages in that the reaction products are produced at the cathode, rather than the anode, so they are kept separate from the fuel, which can result in gains in efficiency. 11, 12 For fuel cells that use ammonia as a fuel, the use of proton-conducting electrolytes prevents the formation of NO, an unwanted byproduct.…”