Stability and Conductivity of In3+-Doped SnP2O7 with Varying Phosphorous to Metal Ratios

作者：Kreller Cortney R^*; Wilson Mahlon S; Mukundan Rangachary; Brosha Eric L; Garzon Fernando H

来源：ECS Electrochemistry Letters, 2013, 2(9): F61-F63.

DOI：10.1149/2.002309eel

In-doped tin pyrophosphate materials were synthesized with varying metal to phosphate ratios to assess the influence of an excess amorphous polyphosphate phase on conductivity. Total conductivity at 250 degrees C increased with phosphorus to metal (P:M) ratio, with the 2.81 P:M ratio material exhibiting maximum conductivity of 10(-2) and 10(-1) Scm(-1) in dry and humidified N-2. XRD measurements revealed no systematic change in lattice parameter with increasing P:M. These results combined with supporting spectroscopy, suggest that a grain-boundary polyphosphate phase is required to achieve high conductivity in the low-intermediate temperature range. The materials were relatively stable and provided steady conductivities at 250 degrees C.

• 出版日期2013