Sulfur-Rich Molybdenum Sulfide as a Cathode Material for Room Temperature Sodium–Sulfur Batteries

The low cost, abundance, and high capacity of sodium and sulfur make them attractive battery materials. However, formation and migration of polysulfides in sulfur batteries causes rapid capacity fade, limiting battery cycle life. Most strategies to mitigate polysulfide shuttling address migration ra...

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Bibliographic Details
Published inACS applied energy materials Vol. 3; no. 7; pp. 6121 - 6126
Main Authors Meyerson, Melissa L, Papa, Philippe E, Weeks, Jason A, Paul-Orecchio, Austin G, Heller, Adam, Mullins, C. Buddie
Format Journal Article
LanguageEnglish
Published American Chemical Society 27.07.2020
Subjects
transition metal sulfide
sodium
molybdenum sulfide
battery
Na−S
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Summary:The low cost, abundance, and high capacity of sodium and sulfur make them attractive battery materials. However, formation and migration of polysulfides in sulfur batteries causes rapid capacity fade, limiting battery cycle life. Most strategies to mitigate polysulfide shuttling address migration rather than formation and require complicated or expensive synthetic steps. Here, we introduce an amorphous, sulfur-rich molybdenum sulfide as a sulfur equivalent cathode that is simple and easy to make and shows excellent cycling performance with a specific capacity of 537 mAh g–1 at 50 mA g–1, retaining over 200 mAh g–1 at a rate of 1 A g–1.
ISSN:2574-0962
2574-0962
DOI:10.1021/acsaem.0c01160