Properties of Stannum-Based Li-NASICON-Structured Solid Electrolytes for Potential Application in Electrochemical Devices

摘要

The aim of this study was to synthesize NASICON-structured LiSn2P3O12 solid electrolytes by thecitric acid assisted sol-gel method upon sintering for 48 hours instead of 24 hours, as reported in ourprevious study. X-ray diffraction analysis confirmed the formation of a rhombohedral phase of aNASICON-type structure upon sintering at 600 and 650 C for 48 hours. By sintering a sample of-5 -1 LiSn2P3O12 at a temperature of 600 C, a conductivity of 1.38 10 Scm at 500 C was obtained.-5 -1 o Meanwhile, a lower conductivity of 1.03 x 10 Scm at 500 C was obtained when the LiSn2P3O12sample was sintered at a temperature of 650 C. The decomposition voltage reached 4.8 V for thehighest conducting LiSn2P3O12 sample sintered at 600 C. Thus, the current results show thatLiSn2P3O12 is a promising candidate for applications as a solid electrolyte in elevated temperatureelectrochemical devices.