Dredging sodium polysulfides using a Fe3C electrocatalyst to realize improved room-temperature Na–S batteries

Huang, Xiang Long; Hussain, Tanveer; Liu, Hanwen; Kaewmaraya, Thanayut; Xu, Maowen; Liu, Hua Kun; Dou, Shi Xue; Wang, Zhiming

doi:10.1039/D3QI00661A

Author(s)

Huang, Xiang Long

Hussain, Tanveer

Liu, Hanwen

Kaewmaraya, Thanayut

Xu, Maowen

Liu, Hua Kun

Dou, Shi Xue

Wang, Zhiming

Publication Date

2023-07-21

Abstract

The shuttle effect of soluble polysulfides is a critical challenge that hinders the realization of pragmatic room-temperature sodium–sulfur (RT Na–S) batteries. To surmount this intractable issue, carbon nanorods decorated with highly sulfiphilic nanosized cementite (nano-Fe3C) are employed to serve as the role of S host. The nano-Fe3C strongly interacts with soluble polysulfide intermediates via Fe–S bonds to block their shuttling action. More significantly, the nano-Fe3C enables the dredging of these polysulfides via its electrocatalytic effect, which is accompanied by improved redox kinetics. Moreover, the hierarchical porous carbon nanorod substrate promotes the fast transport of electrons and accommodates the dramatic volumetric fluctuation of the active materials. As a result, the nano-Fe3C-decorated S cathode demonstrates outstanding cyclability (capacity retention of 373 mA h g−1 over 900 cycles at 1.0 A g−1 ).This work presents an excellent highly efficient electrocatalyst that realizes improved RT Na–S batteries.

Citation

Inorganic Chemistry Frontiers, 10(14), p. 4241-4251

ISSN

2052-1553

2052-1545

Link

https://hdl.handle.net/1959.11/55901

Language

en

Publisher

Royal Society of Chemistry

Title

Dredging sodium polysulfides using a Fe3C electrocatalyst to realize improved room-temperature Na–S batteries

Type of document

Journal Article

Entity Type

Publication

Author(s)	Huang, Xiang Long Hussain, Tanveer Liu, Hanwen Kaewmaraya, Thanayut Xu, Maowen Liu, Hua Kun Dou, Shi Xue Wang, Zhiming
Publication Date	2023-07-21
Abstract	<p>The shuttle effect of soluble polysulfides is a critical challenge that hinders the realization of pragmatic room-temperature sodium–sulfur (RT Na–S) batteries. To surmount this intractable issue, carbon nanorods decorated with highly sulfiphilic nanosized cementite (nano-Fe<sub>3</sub>C) are employed to serve as the role of S host. The nano-Fe<sub>3</sub>C strongly interacts with soluble polysulfide intermediates via Fe–S bonds to block their shuttling action. More significantly, the nano-Fe<sub>3</sub>C enables the dredging of these polysulfides via its electrocatalytic effect, which is accompanied by improved redox kinetics. Moreover, the hierarchical porous carbon nanorod substrate promotes the fast transport of electrons and accommodates the dramatic volumetric fluctuation of the active materials. As a result, the nano-Fe<sub>3</sub>C-decorated S cathode demonstrates outstanding cyclability (capacity retention of 373 mA h g<sub>−1</sub> over 900 cycles at 1.0 A g<sub>−1</sub> ).This work presents an excellent highly efficient electrocatalyst that realizes improved RT Na–S batteries.</p>
Citation	Inorganic Chemistry Frontiers, 10(14), p. 4241-4251
ISSN	2052-1553 2052-1545
Link	https://hdl.handle.net/1959.11/55901
Language	en
Publisher	Royal Society of Chemistry
Title	Dredging sodium polysulfides using a Fe3C electrocatalyst to realize improved room-temperature Na–S batteries
Type of document	Journal Article
Entity Type	Publication

Dredging sodium polysulfides using a Fe3C electrocatalyst to realize improved room-temperature Na–S batteries

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