Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 163, Issue 9, Pages A2029-A2034Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0771609jes
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Funding
- Danish Agency for Science, Technology and Innovation (DASTI)
- COST action [MP1103]
- Netherlands Organisation for Scientific Research (NWO-ECHO)
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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 degrees C), 0.03 C rates and working voltage of 2 V. (C) The Author(s) 2016. Published by ECS. All rights reserved.
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