Effect of In doping on the structure and electrochemical performance of LGPS electrolytes
In order to improve the structural and chemical stability of Li10GeP2S12(LGPS),a series of In-doped LGPS electrolytes,Li10InxGe1-0.75xP2S12(x=0.1-0.5)(LGInPS),were prepared by high-energy mechanical ball milling combined with high-temperature sintering.SEM morphology observation and XRD physical phase analy-sis showed that with the In elemental participation increased,the density and crystallinity of LGInPS series e-lectrolytes gradually increased and when x＞0.3,the impurity content began to increase and the particle ag-glomeration phenomenon began to be serious.The structural analysis and electrochemical performance of LG-InPS electrolytes with optimal In doping x=0.3 were tested and compared with LGPS,and the results showed that the electrochemical and structural stability of LGInPS improved when the In doping amount was x=0.3.In addition,the structural unit of the highly conductive phases in LGInPS was strengthened,the AC impedance re-duced(69％),and the ionic conductivity increased(106％).
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