The Intermediate Temperature Electrochemical Properties of Silver and Aluminum Double-Doped Strontium Silicate

摘要

In this study, Sr 0.6 Ag 0.4 SiO3-aand Sr 0.6 Ag 0.4 Si 0.9 Al 0.1 O3-aelectrolytes were synthesized via a hightemperature solid state reaction method using SrCO 3 , SiO 2 , AgNO 3 and Al 2 O 3 as raw materials. Thephase purities and morphologies of Sr 0.6 Ag 0.4 SiO3-aand Sr 0.6 Ag 0.4 Si 0.9 Al 0.1 O3-awere confirmed by X-ray diffractometer and scanning electron microscopy. SEM photos showed that Sr 0.6 Ag 0.4 SiO3-aandSr 0.6 Ag 0.4 Si 0.9 Al 0.1 O3-apellets were well-sintered. The Arrhenius plots indicated that the activationenergies of Sr 0.6 Ag 0.4 SiO3-aand Sr 0.6 Ag 0.4 Si 0.9 Al 0.1 O3-aare 107.3 ± 3.2 kJ·mol -1 and 107.7 ± 2.1kJ·mol -1 in nitrogen atmosphere from 400 °C to 800 °C, respectively. Sr 0.6 Ag 0.4 SiO3-ashowed thehighest maximum power density of 48.5 mW·cm -2 at 800 °C.