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High‐Density Oxygen Doping of Conductive Metal Sulfides for Better Polysulfide Trapping and Li2S‐S8 Redox Kinetics in High Areal Capacity Lithium–Sulfur Batteries

Advanced science, 2022-06, Vol.9 (17), p.n/a [Peer Reviewed Journal]

2022 The Authors. Advanced Science published by Wiley‐VCH GmbH ;2022. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;ISSN: 2198-3844 ;EISSN: 2198-3844 ;DOI: 10.1002/advs.202200840 ;PMID: 35411708

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  • Title:
    High‐Density Oxygen Doping of Conductive Metal Sulfides for Better Polysulfide Trapping and Li2S‐S8 Redox Kinetics in High Areal Capacity Lithium–Sulfur Batteries
  • Author: Li, Yiyi ; Wu, Haiwei ; Wu, Donghai ; Wei, Hairu ; Guo, Yanbo ; Chen, Houyang ; Li, Zhijian ; Wang, Lei ; Xiong, Chuanyin ; Meng, Qingjun ; Liu, Hanbin ; Chan, Candace K.
  • Subjects: Chemistry ; doping ; Electrolytes ; free‐standing paper ; kinetics ; Lithium ; lithium polysulfide (LiPS) ; lithium‐sulfur batteries ; Metal oxides ; Microscopy ; Morphology ; Sulfur
  • Is Part Of: Advanced science, 2022-06, Vol.9 (17), p.n/a
  • Description: Exploring new materials and methods to achieve high utilization of sulfur with lean electrolyte is still a common concern in lithium‐sulfur batteries. Here, high‐density oxygen doping chemistry is introduced for making highly conducting, chemically stable sulfides with a much higher affinity to lithium polysulfides. It is found that doping large amounts of oxygen into NiCo2S4 is feasible and can make it outperform the pristine oxides and natively oxidized sulfides. Taking the advantages of high conductivity, chemical stability, the introduced large Li–O interactions, and activated Co (Ni) facets for catalyzing Sn2–, the NiCo2(O–S)4 is able to accelerate the Li2S‐S8 redox kinetics. Specifically, lithium‐sulfur batteries using free‐standing NiCo2(O–S)4 paper and interlayer exhibit the highest capacity of 8.68 mAh cm–2 at 1.0 mA cm–2 even with a sulfur loading of 8.75 mg cm–2 and lean electrolyte of 3.8 µL g–1. The high‐density oxygen doping chemistry can be also applied to other metal compounds, suggesting a potential way for developing more powerful catalysts towards high performance of Li–S batteries. Owing to its high conductivity, chemical stability, and sufficient lithium polysulfide (LiPS) affinity, the high‐density oxygen‐doped sulfide can outperform the pristine oxide and the natively oxidized sulfide in terms of catalyzing LiPS conversion for long cycling of Li–sulfur batteries.
  • Publisher: Weinheim: John Wiley & Sons, Inc
  • Language: English
  • Identifier: ISSN: 2198-3844
    EISSN: 2198-3844
    DOI: 10.1002/advs.202200840
    PMID: 35411708
  • Source: Wiley OA刊
    PubMed Central (Open access)
    AUTh Library subscriptions: ProQuest Central
    Directory of Open Access Journals
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