【摘 要】
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Li4SnS4,with a thiostarnate-LISICON structure,which is very similar to the thio-LISICON parent system Li4GeS4,is reported to have shown a promising Li+ ion conductivity of 7 × 10-5 S·cm-1 at 20 ℃ and
【机 构】
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Laboratory of glasses and Ceramics,UMR CNRS 6226 “Institut des Sciences Chimiques de Rennes” Univers
【出 处】
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第八届中国功能玻璃学术研讨会暨新型光电子材料国际论坛
论文部分内容阅读
Li4SnS4,with a thiostarnate-LISICON structure,which is very similar to the thio-LISICON parent system Li4GeS4,is reported to have shown a promising Li+ ion conductivity of 7 × 10-5 S·cm-1 at 20 ℃ and 1.39 mS.cm-1 at 25℃ after aliovalent substitution by As(Li3.833Sn0.833As0.166S4).[1-5] Herein,Li4SnS4 glass-ceramics was successfully prepared by a simply two-step method,a first process of ball milling and then a process of low temperature heat treatment.After an initial 60h ball milling of tin,sulfur and lithium sulfide,a glass state lithium tin sulfide(marked as LTSA60R)was obtained according to XRD analysis,which possesses a low ionic conductivity of 5.66* 10-9 S/cm.Heat treatment including a series of temperature was utilized ranging from 125℃ to 500℃ which is helpful to nucleation and crystallization.Finally,a well crystallized Li4SnS4 glass-ceramics was formed at a temperature of 400 ℃ for 30h and it achieved a higher conductivity of 1.88 10-8 S/cm at 25 ℃.More experiments are carried out to increase its ionic conductivity and to build a highly rechargeable solid electrolyte Li-S battery.
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