All-Solid-State Lithium-Sulfur Battery Based on a Nanoconfined LiBH4 Electrolyte. Issue 9 (21st July 2016)

• Record Type: Journal Article
• Authors: Das, Supti; Ngene, Peter; Norby, Poul; Vegge, Tejs; de Jongh, Petra E.; Blanchard, Didier
• Is Part Of: Journal of the Electrochemical Society. Volume 163:Issue 9(2016)
• Page Start: A2029
• Page End: A2034
• Publication Date: 2016-07-21
• Subjects: All-Solid-State Battery -- Battery -- Fast ionic conductor -- Lithium-sulfur battery -- Solid-Electrolyte; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0771609jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : In this work we characterize all-solid-state lithium-sulfur batteries based on nano-confined LiBH4 in mesoporous silica as solid electrolytes. The nano-confined LiBH4 has fast ionic lithium conductivity at room temperature, 0.1 mScm −1, negligible electronic conductivity and its cationic transport number (t+ = 0.96), close to unity, demonstrates a purely cationic conductor. The electrolyte has an excellent stability against lithium metal. The behavior of the batteries is studied by cyclic voltammetry and repeated charge/discharge cycles in galvanostatic conditions. The batteries show very good performance, delivering high capacities versus sulfur mass, typically 1220 mAhg −1 after 40 cycles at moderate temperature (55°C), 0.03 C rates and working voltage of 2 V.