Sulfur-Based Catholyte Solution with a Glass-Ceramic Membrane for Li-S Batteries

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Shuttling of soluble polysulfide species within electrodes is one of the most challenging issues in lithium-sulfur (Li-S) batteries. The resulting deposition of polysulfide species reduces the conductivity of the metallic Li electrode and the quantity of active material. Here, we demonstrate pronounced suppression of polysulfide shuttle using a sulfide-impermeable glass-ceramic membrane, which is employed as separator between the positive and negative electrodes. As a result, highly stable Li-S electrochemistry occurs in the sulfur-dissolving tetrahydrofuran catholyte solution, which provides good capacity retention and Coulombic efficiency for cycling. This demonstration holds promise for practical next-generation batteries with marked reversibility and the possibility to increase the energy density when equipped with a catholyte flow-through mode.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2016-01
Language
English
Article Type
Article
Keywords

RAY-ABSORPTION SPECTROSCOPY; ELECTRICAL ENERGY-STORAGE; AQUEOUS CATHODE; REDOX COUPLES; FLOW BATTERY; LITHIUM; ELECTROLYTE; DISCHARGE; POLYSULFIDES; SPECIATION

Citation

CHEMELECTROCHEM, v.3, no.1, pp.152 - 157

ISSN
2196-0216
DOI
10.1002/celc.201500342
URI
http://hdl.handle.net/10203/242381
Appears in Collection
CH-Journal Papers(저널논문)
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