Simultaneous immobilization and conversion of polysulfides on Co3O4–CoN heterostructured mediators toward high-performance lithium–sulfur batteries
Lithium–sulfur (Li–S) batteries exhibit great potential as a next-generation rechargeable battery system due to their high energy density, natural abundance, and nontoxicity. Nevertheless, the insulated nature of S and Li2S and the electrochemical instability of intermediate lithium polysulfides (Li...
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sg-ntu-dr.10356-1447842023-02-28T19:29:28Z Simultaneous immobilization and conversion of polysulfides on Co3O4–CoN heterostructured mediators toward high-performance lithium–sulfur batteries Wang, Jin Xiao, Kuikui Ouyang, Bo Zhang, Lili Yang, Hao Liu, Jilei Liang, Pei Rawat, Rajdeep Singh Shen, Zexiang School of Physical and Mathematical Sciences Science::Physics Lithium−sulfur Batteries Cobalt Nitride Lithium–sulfur (Li–S) batteries exhibit great potential as a next-generation rechargeable battery system due to their high energy density, natural abundance, and nontoxicity. Nevertheless, the insulated nature of S and Li2S and the electrochemical instability of intermediate lithium polysulfides (LiPS) obstruct the commercialization of Li–S technologies. Herein, a heterophase Co3O4–CoN sulfur host combined with the merits of efficient polysulfide anchoring (Co3O4) and high conductivity (CoN) is reported to boost Li–S battery performance. Such porous Co3O4–CoN heterostructures endow the intermediate LiPS with the instantaneous immobilization–diffusion–conversion process, thus accelerating redox kinetics and alleviating the polysulfide shuttling. The assembled cathode based on the Co3O4–CoN/CC electrode exhibits a high initial capacity of 1225 mAh g–1 at 0.5 C with excellent rate performance (887 mAh g–1 at 3 C), and the specific capacity can be well maintained to 627 mAh g–1 even after 500 cycles at 3 C. Our work provides an efficient strategy for the rational design of comprehensive host materials enabling simultaneous LiPS immobilization and conversion and will give further impetus to the practical use of Li–S batteries. Accepted version 2020-11-24T06:21:16Z 2020-11-24T06:21:16Z 2019 Journal Article Wang, J., Xiao, K., Ouyang, B., Zhang, L., Yang, H., Liu, J., . . . Shen, Z. (2019). Simultaneous Immobilization and Conversion of Polysulfides on Co3O4–CoN Heterostructured Mediators toward High-Performance Lithium–Sulfur Batteries. ACS Applied Energy Materials, 2(4), 2570–2578. doi:10.1021/acsaem.8b02196 2574-0962 https://hdl.handle.net/10356/144784 10.1021/acsaem.8b02196 4 2 2570 2578 en ACS Applied Energy Materials This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Energy Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsaem.8b02196 application/pdf |
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Science::Physics Lithium−sulfur Batteries Cobalt Nitride Wang, Jin Xiao, Kuikui Ouyang, Bo Zhang, Lili Yang, Hao Liu, Jilei Liang, Pei Rawat, Rajdeep Singh Shen, Zexiang Simultaneous immobilization and conversion of polysulfides on Co3O4–CoN heterostructured mediators toward high-performance lithium–sulfur batteries |
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Lithium–sulfur (Li–S) batteries exhibit great potential as a next-generation rechargeable battery system due to their high energy density, natural abundance, and nontoxicity. Nevertheless, the insulated nature of S and Li2S and the electrochemical instability of intermediate lithium polysulfides (LiPS) obstruct the commercialization of Li–S technologies. Herein, a heterophase Co3O4–CoN sulfur host combined with the merits of efficient polysulfide anchoring (Co3O4) and high conductivity (CoN) is reported to boost Li–S battery performance. Such porous Co3O4–CoN heterostructures endow the intermediate LiPS with the instantaneous immobilization–diffusion–conversion process, thus accelerating redox kinetics and alleviating the polysulfide shuttling. The assembled cathode based on the Co3O4–CoN/CC electrode exhibits a high initial capacity of 1225 mAh g–1 at 0.5 C with excellent rate performance (887 mAh g–1 at 3 C), and the specific capacity can be well maintained to 627 mAh g–1 even after 500 cycles at 3 C. Our work provides an efficient strategy for the rational design of comprehensive host materials enabling simultaneous LiPS immobilization and conversion and will give further impetus to the practical use of Li–S batteries. |
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School of Physical and Mathematical Sciences |
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School of Physical and Mathematical Sciences Wang, Jin Xiao, Kuikui Ouyang, Bo Zhang, Lili Yang, Hao Liu, Jilei Liang, Pei Rawat, Rajdeep Singh Shen, Zexiang |
format |
Article |
author |
Wang, Jin Xiao, Kuikui Ouyang, Bo Zhang, Lili Yang, Hao Liu, Jilei Liang, Pei Rawat, Rajdeep Singh Shen, Zexiang |
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Wang, Jin |
title |
Simultaneous immobilization and conversion of polysulfides on Co3O4–CoN heterostructured mediators toward high-performance lithium–sulfur batteries |
title_short |
Simultaneous immobilization and conversion of polysulfides on Co3O4–CoN heterostructured mediators toward high-performance lithium–sulfur batteries |
title_full |
Simultaneous immobilization and conversion of polysulfides on Co3O4–CoN heterostructured mediators toward high-performance lithium–sulfur batteries |
title_fullStr |
Simultaneous immobilization and conversion of polysulfides on Co3O4–CoN heterostructured mediators toward high-performance lithium–sulfur batteries |
title_full_unstemmed |
Simultaneous immobilization and conversion of polysulfides on Co3O4–CoN heterostructured mediators toward high-performance lithium–sulfur batteries |
title_sort |
simultaneous immobilization and conversion of polysulfides on co3o4–con heterostructured mediators toward high-performance lithium–sulfur batteries |
publishDate |
2020 |
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https://hdl.handle.net/10356/144784 |
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1759855303907606528 |