| Summary: | The aim of this study was to synthesize NASICON-structured LiSn2P3O12 solid electrolytes by the citric acid assisted sol-gel method upon sintering for 48 hours instead of 24 hours, as reported in our previous study. X-ray diffraction analysis confirmed the formation of a rhombohedral phase of a NASICON-type structure upon sintering at 600 and 650 °C for 48 hours. By sintering a sample of LiSn2P3O12 at a temperature of 600 °C, a conductivity of 1.38 ×10-5 Scm-1 at 500 °C was obtained. Meanwhile, a lower conductivity of 1.03 × 10-5 Scm-1 at 500 °C was obtained when the LiSn2P3O12 sample was sintered at a temperature of 650 °C. The decomposition voltage reached 4.8 V for the highest conducting LiSn2P3O12 sample sintered at 600 °C. Thus, the current results show that LiSn2P3O12 is a promising candidate for applications as a solid electrolyte in elevated temperature electrochemical devices. © 2015 The Authors.
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