Proton conducting materials and devices incorporating them

A material for use in proton transport, comprising a formula AxByCzOd, wherein:

• A is selected from a group consisting of Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Th, Dy, Ho, Er, Tm, Yb, Lu, and mixtures thereof;
• B is Zr, Ce, or Hf, or a mixture thereof;
• C is a mixture of at least two members selected from the group consisting of Li, Be, B, carbon, Na, Mg, Al, Si, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Rb, Sr, Y, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, In, Sn, Cs, Ba, Ta, W, Re, Os, Ir, Pt, Au, Hg, Tl, Pb, Fr, Ra, La, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu;
• x and y vary according to 3.2≦x+y≦4.8, the subscripts x, y, z and d are adjusted by a common multiplier so that x≠y;
• z varies according to 0≦z≦0.4;
• and
• d takes a value consistent with the oxidation states of A, B, and C and the stoichiometry x, y, and z to balance the net formula charge, and A and/or C are present in effective amounts for improving proton transport relative to La2Zr2O7.

A material for use in proton transport, comprising a formula ABCzOd, wherein:

• A is selected from a group consisting of Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and mixtures thereof;
• B is Zr, Ce, or Hf, or a mixture thereof;
• C is selected from a group consisting of Li, Be, B, carbon, Na, Mg, Al, Si, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Rb, Sr, Y, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, In, Sn, Cs, Ba, Ta, W, Re, Os, Ir, Pt, Au, Hg, Tl, Pb, Fr, Ra, La, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, and mixtures thereof;
• z varies according to 0≦z≦0.8;
• and
• d takes a value consistent with the oxidation states of A, B, and C and the stoichiometry z to balance the net formula charge, and A and/or C are present in effective amounts for improving proton transport relative to La2Zr2O7.

A material for use in proton transport, comprising a formula AxByCzOd, wherein:

• A is selected from a group consisting of Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and mixtures thereof;
• B is Th, optionally admixed with one or more of Ti, Zr, Ce, or Hf;
• C is selected from a group consisting of elements of Groups IA through IVA, elements of Groups IB through VIIIB, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and mixtures thereof;
• x and y vary according to 3.2≦x+y≦4.8;
• 0.75≦x/y≦1.5;
• z varies according to 0≦z≦0.8;
• and
• d takes a value consistent with the oxidation states of A, B, and C and the stoichiometry x, y, and z to balance the net formula charge, and A and/or C are present in effective amounts for improving proton transport relative to La2Zr2O7.

A material for use in proton transport, comprising a formula AxByCzOd, wherein:

• A is selected from a group consisting of Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and mixtures thereof;
• B is Ti, optionally admixed with an element selected from the group consisting of Zr, Ce, Hf, Th, and combinations thereof;
• C is selected from a group consisting of Li, Ba, Be, B, carbon, Ce, Na, Si, K, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Rb, Y, Zr, Nb, Mo, Tc, Rh, Pd, Ag, Cd, Sn, Cs, Ba, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg, Tl, Pb, Fr, Ra, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, and mixtures thereof;
• x and y vary according to 1.6≦x+y≦2.4 and 0.75≦x/y≦1.5;
• z varies according to 0≦z≦0.4;
• and
• d takes a value consistent with the oxidation states of A, B, and C and the stoichiometry x, y, and z to balance the net formula charge, and A and/or C are present in effective amounts for improving proton transport relative to La2Zr2O7.