Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 134, Issue 10, Pages 4505-4508Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja211766q
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Funding
- U.S. Department of Energy, Vehicle Technologies Office
- U.S. Department of Energy (DOE) Office of Science [DE-AC02-06CH11357]
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A new class of selenium and selenium-sulfur (SexSy)-based cathode materials for room temperature lithium and sodium batteries is reported. The structural mechanisms for Li/Na insertion in these electrodes were investigated using pair distribution function (PDF) analysis. Not only does the Se electrode show promising electrochemical performance with both Li and Na anodes, but the additional potential for mixed SexSy systems allows for tunable electrodes, combining the high capacities of S-rich systems with the high electrical conductivity of the d-electron containing Se. Unlike the widely studied Li/S system, both Se and SexSy can be cycled to high voltages (up to 4.6 V) without failure. Their high densities and voltage output offer greater volumetric energy densities than S-based batteries, opening possibilities for new energy storage systems that can enable electric vehicles and smart grids.
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