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An in-situ catalytic-insoluble strategy enabled by sulfurized polyacrylonitrile-based composite cathode for potassium–sulfur batteries

Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan 250061, P. R. China

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Bo Zhu

Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan 250061, P. R. China

E-mail Address: [email protected]

Corresponding author.

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Jinkui Feng

Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan 250061, P. R. China

E-mail Address: [email protected]

Corresponding author.

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Chengguo Wang

Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan 250061, P. R. China

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Xun Cai

School of Software, Shandong University, Jinan 250101, P. R. China

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, and

Rongman Qin

Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan 250061, P. R. China

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https://doi.org/10.1142/S1793604721430037Cited by:2 (Source: Crossref)

This article is part of the issue:

Topical Issue: Interface-Structural Materials for Catalysis and Energy
Guest Editors: Jiangfeng Ni and Feng Yang

Abstract

Owing to the insoluble organosulfur mechanism and stable cycling life, sulfurized polyacrylonitrile (SPAN) developed as a promising cathode material for high-energy potassium–sulfur batteries (KSBs). However, it is yet a major challenge to achieve fast catalytic kinetics and high reversible capacity in SPAN-based cathodes. Here, one-step electrospun SPAN nanofibers embedded with Fe $_{x}$ Nb $_{y}$ O metal oxide nanoparticles (FeNb@SPAN) have been successfully developed to construct sulfur electrodes with high electrochemical activity, high sulfur utilization, and high cycling stability. The as-prepared freestanding FeNb@SPAN composite cathode, which featuring interwoven nanofibers with Fe $_{x}$ Nb $_{y}$ O nanoparticles homogeneously implanted, possesses high storage space for volume expansion and suppresses polysulfide dissolution during potassiation/depotassiation. Benefiting from its unique structure and composition in electrode design, the FeNb@SPAN cathode is endowed with outstanding energy storage performances with a high initial specific capacity of 776 mAh $^{.}$ g $^{- 1}$ under 50 mA $^{.}$ g $^{- 1}$ and an excellent cycling capability of 201 mAh $^{.}$ g $^{- 1}$ after 80 charge/discharge processes. This work heralds a feasible strategy toward SPAN-based sulfur host materials in the structural design of next-generation high-performance cathode materials for KSBs and other metal–sulfur batteries.

Keywords:

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Vol. 14, No. 07

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History

Received 7 July 2021

Accepted 8 August 2021

Published: 23 September 2021

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An in-situ catalytic-insoluble strategy enabled by sulfurized polyacrylonitrile-based composite cathode for potassium–sulfur batteries

Abstract

References

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An in-situ catalytic-insoluble strategy enabled by sulfurized polyacrylonitrile-based composite cathode for potassium–sulfur batteries

Abstract

References

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