Patent ID: 8426077
Filing Date: 2013-04-23
Classification: G01N,H01B,H01M,Y02E,Y10T

Abstract:
1. A fuel cell or a sensor with a proton conducting electrolyte comprising an acceptor-doped rare earth orthoniobate or orthotantalate of formula (I) wherein Ln is Y or La—Lu ion; A is Mg, Ca or Sr metal ion having a valency less than that of metal Ln; M is Nb or Ta; B is Mg, Sc, Al, Ti, Zr, Fe, Mn, or Eu having a valency less than that of metal M; x=0.001-0.1, y=0-0.1, with the proviso that at least one of x or y is not 0; wherein each constituent of the formula may also be present as a mixture of two or more of the named individual elements.