【摘 要】
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With growth of portable electric devices such as laptops,mobile phones and electric vehicles,energy storage is becoming more and more important in daily life.Lithium secondary batteries are extensivel
【机 构】
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Institut des Sciences Chimiques de Rennes,Eq.Verres et Céramiques,UMR 6226 CNRS,Univ.Rennes 1,35042
【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
With growth of portable electric devices such as laptops,mobile phones and electric vehicles,energy storage is becoming more and more important in daily life.Lithium secondary batteries are extensively used because of their high-energy density[1].However,organic electrolytes conventionally used in these ones present a risk of flammability and leakage.To solve safety issues,all solid-state batteries using non-flammable electrolyte with high energy density have to be developed.Glassy materials are easy to shape and present a wide range of control of properties with composition.Moreover,they are characterized by isotropic properties and no grain boundaries,explaining higher ionic conductivity values generally observed than that of corresponding crystal[2].Thus,glassy electrolytes exhibit good potential to be used in all solid state batteries.In this study,GeS2-Ga2S3 was chosen as the base glass-former.Indeed,this one is known as a good host to integrate alkali halides(MX)and to obtain a drastic increase of ionic conductivity[3].As Li halide was showed as exhibiting the highest ionic conductivity[4-6],the alkali was added to the base glass-former as LiCl.Pseudo-temary glasses were synthesized by melting elements and compounds in an evacuated silica ampoule and by quenching it in salted water.Two different series based on the host glasses 0.8GeS2·0.2Ga2S3 and 0.7GeS2·0.3Ga2S3 were studied to highlight the influence of LiCl content.Electric properties of these series were investigated by means of impedance spectroscopy.Raman scattering measurements were performed to show the composition dependence of local structure and help to understand the effect of structural changes on the ionic conductivity.
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