Ionic-Liquid-Assisted Synthesis of N, F, and B Co-Doped CoFe_2O_(4?x) on Multiwalled Carbon Nanotubes with Enriched Oxygen Vacancies for Li–S Batteries

Hu Shunyou; Yi Mingjie; Wu HaoWang TianshengMa XingLiu XiangliZhang Jiaheng

首页> 外文期刊>Advanced functional materials >Ionic-Liquid-Assisted Synthesis of N, F, and B Co-Doped CoFe_2O_(4?x) on Multiwalled Carbon Nanotubes with Enriched Oxygen Vacancies for Li–S Batteries

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Ionic-Liquid-Assisted Synthesis of N, F, and B Co-Doped CoFe_2O_(4?x) on Multiwalled Carbon Nanotubes with Enriched Oxygen Vacancies for Li–S Batteries

机译：Ionic-Liquid-Assisted Synthesis of N, F, and B Co-Doped CoFe_2O_(4?x) on Multiwalled Carbon Nanotubes with Enriched Oxygen Vacancies for Li–S Batteries

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The "shuttle effect," sluggish redox kinetics, and short life cycle have seriously restricted the practical application of Li-S batteries. Herein, N, F, and B co-doped NFBCoFe2O4-x on multiwalled carbon nanotubes' (MWCNTs) (NFBCoFe2O4-x@MWCNTs) composite material with enriched oxygen vacancies (OVs) introduced by ionic liquids (ILs) does not only exhibit enhanced polysulfides trapping ability but also effectively accelerate the redox kinetics of polysulfides. A commercial Celgard polypropylene (PP) 2400 separator with NFBCoFe2O4-x@MWCNTs coating layer is fabricated as a multifunctional barrier for Li-S batteries. As a result, the battery based on the NFBCoFe2O4-x@MWCNTs separator demonstrates a stable electrochemical performance. Even under a high S loading of 8.0 mg cm(-2), a desirable areal capacity of 4.62 mAh cm(-2) can still be maintained over 200 cycles at a current density of 0.2 C. The prospective strategy of engineering OVs introduced by ILs provides novel insights into the development of Li-S batteries.

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《Advanced functional materials》 |2022年第14期|2111084.1-2111084.12|共12页
作者
Hu Shunyou; Yi Mingjie; Wu HaoWang TianshengMa XingLiu XiangliZhang Jiaheng;
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Harbin Inst Technol, Sauvage Lab Smart Mat, Shenzhen 518055, Peoples R China|Harbin Inst Technol, Res Ctr Printed Flexible Elect, Sch Mat Sci & Engn, Shenzhen 518055, Peoples R China;

Harbin Inst Technol, Shenzhen Engn Lab Aerosp Detect & Imaging, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China;

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正文语种英语
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ionic liquid; lithium-sulfur batteries; NFBCoFe; O-2; (4-); (x)@MWCNTs; oxygen vacancies; separator;

Ionic-Liquid-Assisted Synthesis of N, F, and B Co-Doped CoFe_2O_(4?x) on Multiwalled Carbon Nanotubes with Enriched Oxygen Vacancies for Li–S Batteries

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