摘要

In this study, a novel dense Ti0.95Mg0.05P2O7/(K/Na)Ti-2(PO.(4))(3) composite electrolyte was successfully fabricated via an one-step heating approach using Ti(0.95)Mg(0.05)P(2)0(7) and NaCl/KCl inorganic salts as precursors and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results of XRD and SEM confirmed that in-situ chemical reactions between Ti0.95Mg0.05P2O7 and NaCl/KCl molten salt take place during the heating process. The conductivity and fuel cell performance of the Ti0.95Mg0.05P2O7/(K/Na)Ti-2(PO4)(3) composite electrolyte were enhanced by the introduction of (K/Na)Ti-2(P0(4))(3). The Ti0.95Mg0.05P2O7/(K/ Na)Ti-2(P0(4))(3) composite electrolyte is a mixed conductor of oxide-ion and electron hole under oxygen-containing atmosphere and a pure protonic conductor under hydrogen-containing atmosphere. The H-2/0(2) fuel cell with the Ti0.95Mg0.05P2O7/(K/Na)Ti-2(PO4)(3) electrolyte membrane showed a maximum power output density of 142.3mWcm-(2) at 700 degrees C.