Synthesis and ionic conductivity of Li6La3BiSnO12 with cubic garnet-type structure via solid-state reaction
来源期刊：中南大学学报(英文版)2015年第8期
论文作者：彭红建 肖理红 曹远尼 栾向峰
文章页码：2883 - 2886
Key words：Li+-ion solid electrolyte; lithium battery; garnet-type electrolyte; solid-state reaction
Abstract: the synthesis and transport properties of the Li6La3BiSnO12 solid electrolyte by a solid-state reaction were reported. The condition to synthesize the Li6La3BiSnO12 is 785 °C for 36 h in air. The refined lattice constant of Li6La3BiSnO12 is 13.007 ？. Qualitative phase analysis by X-ray powder diffraction patterns combined with the Rietveld method reveals garnet type compounds as major phases. The Li-ion conductivity of the prepared Li6La3BiSnO12 is 0.85×10-4 S/cm at 22 °C, which is comparable with that of the Li5La3Bi2O12. The Li6La3BiSnO12 compounds are chemically stable against LiCoO2 which is widely used as cathode material up to 700 °C but not against the LiMn2O4 if the temperature is higher than 550 °C. The Li6La3BiSnO12 exhibits higher chemical stability than Li5La3Bi2O12, which is due to Sn substitution for Bi.
PENG Hong-jian(彭红建), XIAO Li-hong(肖理红), CAO Yuan-ni(曹远尼), LUAN Xiang-feng(栾向峰)
(College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China)
Abstract:the synthesis and transport properties of the Li6La3BiSnO12 solid electrolyte by a solid-state reaction were reported. The condition to synthesize the Li6La3BiSnO12 is 785 °C for 36 h in air. The refined lattice constant of Li6La3BiSnO12 is 13.007 ？. Qualitative phase analysis by X-ray powder diffraction patterns combined with the Rietveld method reveals garnet type compounds as major phases. The Li-ion conductivity of the prepared Li6La3BiSnO12 is 0.85×10-4 S/cm at 22 °C, which is comparable with that of the Li5La3Bi2O12. The Li6La3BiSnO12 compounds are chemically stable against LiCoO2 which is widely used as cathode material up to 700 °C but not against the LiMn2O4 if the temperature is higher than 550 °C. The Li6La3BiSnO12 exhibits higher chemical stability than Li5La3Bi2O12, which is due to Sn substitution for Bi.
Key words:Li+-ion solid electrolyte; lithium battery; garnet-type electrolyte; solid-state reaction
