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MnO2 particles-embedded porous carbon network as advanced sulfur host for high electrochemical performance

MnO2 particles-embedded porous carbon network as advanced sulfur host for high electrochemical... Although the lithium-sulfur batteries have high specific capacity and energy density, it is still a challenge to achieve the wide commercial applications due to the severe polysulfide migration and poor electronic conductivity of the element sulfur. To this context, we developed porous carbon/MnO2 (PCMO) composites as sulfur host materials to increase the adsorption ability between the PCMO host and polysulfide. The MnO2 particles embedded on the porous carbon severe as active sites to effectively adsorb and catalyze the polysulfide, therefore improving the redox kinetics and reducing shuttle effect. More importantly, the porous structure of the carbon can provide pathways for the lithium-ion diffusion, which accelerates the ion transport through the electrode. Owing to these merits, the as-prepared PCMO/S cathode exhibits high capacity, stable cycle performance and excellent rate capability. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

MnO2 particles-embedded porous carbon network as advanced sulfur host for high electrochemical performance

Ionics , Volume 28 (8) – Aug 1, 2022

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References (24)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022
ISSN
0947-7047
eISSN
1862-0760
DOI
10.1007/s11581-022-04639-8
Publisher site
See Article on Publisher Site

Abstract

Although the lithium-sulfur batteries have high specific capacity and energy density, it is still a challenge to achieve the wide commercial applications due to the severe polysulfide migration and poor electronic conductivity of the element sulfur. To this context, we developed porous carbon/MnO2 (PCMO) composites as sulfur host materials to increase the adsorption ability between the PCMO host and polysulfide. The MnO2 particles embedded on the porous carbon severe as active sites to effectively adsorb and catalyze the polysulfide, therefore improving the redox kinetics and reducing shuttle effect. More importantly, the porous structure of the carbon can provide pathways for the lithium-ion diffusion, which accelerates the ion transport through the electrode. Owing to these merits, the as-prepared PCMO/S cathode exhibits high capacity, stable cycle performance and excellent rate capability.

Journal

IonicsSpringer Journals

Published: Aug 1, 2022

Keywords: Lithium-sulfur batteries; MnO2; Carbon; Capacity; Cycle performance

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