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Abstract:
Polarization of lithium-sulfur (Li-S) batteries consumes energy density upon cycling, which precludes their practical application in state-of-the-art devices. Herein a conformal zinc sulfide/reduced graphene oxide/elemental sulfur (ZnS/rGO/S) composite is synthesized and used as cathode materials in Li-S batteries. The synergetic regulation of ohmic, concentration, and electrochemical polarization decreases the overpotential and improves the cycling performance of the Li||ZnS/rGO/S cell. Combining theoretical calculations and experimental results, it is revealed that the ZnS spheres can absorb lithium polysulfide (LPS) intermediates, catalyze LPS conversion, and provide fast electronic/ionic diffusion kinetics. The ZnS/rGO/S cathode is further applied in pouch Li-S cells, demonstrating the practicability of sulfur cathodes with reduced polarization. © 2020 Elsevier Ltd
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Source :
Materials Today Energy
Year: 2020
Volume: 18
7 . 3 1 1
JCR@2020
9 . 0 0 0
JCR@2023
ESI HC Threshold:196
JCR Journal Grade:1
CAS Journal Grade:2
Cited Count:
SCOPUS Cited Count: 61
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 3
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