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首页> 中文期刊> 《天然气化学（英文版）》 >A lightweight nitrogen/oxygen dual-doping carbon nanofiber interlayer with meso-/micropores for high-performance lithium-sulfur batteries

A lightweight nitrogen/oxygen dual-doping carbon nanofiber interlayer with meso-/micropores for high-performance lithium-sulfur batteries

         
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摘要

Lithium-sulfur(Li-S) batteries are promising energy-storage devices for future generations of portable electronics and electric vehicles because of the outstanding energy density,low cost,and nontoxic nature of S.In the past decades,various novel electrodes and electrolytes have been studied to improve the performance of Li-S batteries.However,the very limited lifespan and rate performance of Li-S batteries originating from the dissolution and diffusion of long-chain polysulfides in liquid electrolytes,and the intrinsic poor conductivity of S severely hinder their practical application.Herein,an electrospinning method was developed to fabricate a thin conductive interlayer consisting of meso-/microporous N/O dual-doping carbon nanofiber(CNF).The freestanding 3 D interwoven structure with conductive pathways for electrons and ions can enhance the contact between polysulfides and N/O atoms to realize the highly robust trapping of polysulfides via the extremely polar interaction.Consequently,combining the meso-microporous N/O dual-doping CNF interlayer with a monodispersed S nanoparticle cathode results in a superior electrochemical performance of 862.5 mAh/g after 200 cycles at 0.2 C and a cycle decay as low as 0.08% per cycle.An area specific capacity of 5.22 mAh/cm^(2) can be obtained after 100 cycles at 0.1 C with a high S loading of 7.5 mg/cm^(2).

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  • 来源
    《天然气化学（英文版）》 |2021年第7期|115-123|共9页
  • 作者

    Fangyuan Hu; Hao Peng; Tianpeng Zhang; Wenlong Shao; Siyang Liu; Jinyan Wang; Chenghao Wang; Xigao Jian;

  • 作者单位

    School of Materials Science and Engineering State Key Laboratory of Fine Chemicals Key Laboratory of Energy Materials and Devices (Liaoning Province).Dalian University of Technology Dalian 116024 Liaoning China;

    School of Materials Science and Engineering State Key Laboratory of Fine Chemicals Key Laboratory of Energy Materials and Devices (Liaoning Province).Dalian University of Technology Dalian 116024 Liaoning China;

    School of Materials Science and Engineering State Key Laboratory of Fine Chemicals Key Laboratory of Energy Materials and Devices (Liaoning Province).Dalian University of Technology Dalian 116024 Liaoning China;

    State Key Laboratory of Fine Chemicals Liaoning Province Engineering Research Centre of High Performance Resins.Dalian University of Technology Dalian 116024 Liaoning China;

    School of Materials Science and Engineering State Key Laboratory of Fine Chemicals Key Laboratory of Energy Materials and Devices (Liaoning Province).Dalian University of Technology Dalian 116024 Liaoning China;

    State Key Laboratory of Fine Chemicals Liaoning Province Engineering Research Centre of High Performance Resins.Dalian University of Technology Dalian 116024 Liaoning China;

    State Key Laboratory of Fine Chemicals Liaoning Province Engineering Research Centre of High Performance Resins.Dalian University of Technology Dalian 116024 Liaoning China;

    School of Materials Science and Engineering State Key Laboratory of Fine Chemicals Key Laboratory of Energy Materials and Devices (Liaoning Province).Dalian University of Technology Dalian 116024 Liaoning China;

    State Key Laboratory of Fine Chemicals Liaoning Province Engineering Research Centre of High Performance Resins.Dalian University of Technology Dalian 116024 Liaoning China;

    School of Mathematical Sciences Dalian University of Technology Dalian 116024 Liaoning China;

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