A new solid electrolyte to fill the gap between low temperatures and high temperatures SOFC materials?

摘要

According to TG/DTA analysis, the new pyrochlore-type compound K0.88H1.12Nb2O6 center dot 1.58H(2)O (Fd-3 m, a= 10.645(4) angstrom at 300 K) loses crystallization water on heating up to 773 K, but retains-OH hydrogen. Impedance spectroscopy in non-humidified air suggests the material is promising for SOFC applications at intermediate temperatures because the bulk conductivity values reach 10(-2) S/cm at 623 K. (c) 2008 Elsevier B.V. All rights reserved.