Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 33, Pages 9634-9638Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201604158
Keywords
batteries; chalcogens; sodium; solid electrolytes; solution process
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Funding
- Basic Science Research Program through National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2014R1A1A2058760]
- UNIST [1.160004.01]
- Ministry of Science, ICT & Future Planning, Republic of Korea [2016국가전력난] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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All-solid-state sodium-ion batteries that operate at room temperature are attractive candidates for use in large-scale energy storage systems. However, materials innovation in solid electrolytes is imperative to fulfill multiple requirements, including high conductivity, functional synthesis protocols for achieving intimate ionic contact with active materials, and air stability. A new, highly conductive (1.1 mScm(-1) at 25 degrees C, E-a=0.20 eV) and dry air stable sodium superionic conductor, tetragonal Na3SbS4, is described. Importantly, Na3SbS4 can be prepared by scalable solution processes using methanol or water, and it exhibits high conductivities of 0.1-0.3 mScm(-1). The solution-processed, highly conductive solidified Na3SbS4 electrolyte coated on an active material (NaCrO2) demonstrates dramatically improved electrochemical performance in all-solid-state batteries.
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