A lithium-sulfur battery using a solid, glass-type P₂S₅-Li₂S electrolyte

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• 作者：Marco Agostini^a ; Yuichi Aihara^b ; Takanobu Yamada^b ; Bruno Scrosati^a ; Jusef Hassoun^a ; ^{jusef.hassoun@uniroma1.it}
• 关键词：Li2S&ndash ; P2S5 ; Glass-type ; Solid electrolyte ; Lithium&ndash ; sulfur ; Battery
• 刊名：Solid State Ionics
• 出版年：2013
• 出版时间：1 August, 2013
• 年：2013
• 卷：244
• 期：Complete
• 页码：48-51
• 全文大小：322 K

文摘

In this work we characterize a solid-state lithium-sulfur battery using a Li₂S-P₂S₅ glass-type electrolyte. The electrolyte is prepared by powder pellet-pressing and the effect of the applied pressure on the ionic conductivity as well as its temperature dependence is studied by electrochemical impedance spectroscopy. The lithium-sulfur battery electrochemical process is studied by potentiodynamic cycling with galvanostatic acceleration (PCGA) at an operating temperature of 80 ¡ãC. The cycling behavior of the battery is studied by repeated charge/discharge in galvanostatic conditions. The results demonstrate that the electrolyte has a conductivity ranging from 1*10^?4 to 5*10^?3 S cm^?1 by increasing the temperature from 0 ¡ãC to 80 ¡ãC, respectively. Furthermore, the PCGA measurement shows a maximum capacity referred versus sulfur mass of the order of 1200 mAh g^? 1, while the cycling test, performed at C/20, indicates a steady-state capacity of the order of 400 mAh g^? 1, a working voltage of 2.1 V and a resulting theoretical energy density of 840 Wh kg^? 1. Considering the results we believe that the solid-state, lithium sulfur cell with the Li₂S-P₂S₅ electrolyte may be proposed as high-energy density battery for safe, low-cost energy storage applications.