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作者:

Li, Yonghe (Li, Yonghe.) | Liu, Zhun (Liu, Zhun.) | Cheng, Xiaopeng (Cheng, Xiaopeng.) | Liu, Xianqiang (Liu, Xianqiang.) | Zhang, Bin (Zhang, Bin.) | Sun, Dongsheng (Sun, Dongsheng.) | Wang, Ruzhi (Wang, Ruzhi.) (学者:王如志) | Zhang, Yuefei (Zhang, Yuefei.) (学者:张跃飞)

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摘要:

Molybdenum disulfide (MoS2) has received considerable interest for electrochemical energy storage and conversion. In this work, we demonstrate a material on synthesis of a unique hierarchical hollow structure by growing layered MoS2 nanosheets on assembled graphene nanotubes via a template-sacrificed approach (named as graphene@MoS2 nanotubes). As a proof of concept, the graphene@MoS2 nanotubes as the anode materials of lithium-ion batteries exhibit excellent cycling performance at 400 mA g(-1) up to 120 cycles without considerable capacity loss (830 mA h g(-1), with 96.5% capacity retention) and high rate behavior (502 mA h g(-1) at 2000 mA g(-1)), which is far beyond than that of the pure MoS2 nanosheets and even graphene@MoS2 nanosheets composites. Furthermore, combined with in-situ TEM lithiation experiments, we find a novel conversion reaction mechanism of MoS2 anodes that Li ions induce structural destruction in c-direction following a dynamic layer-by-layer dissociation with Mo/Li2S composites left, rather than well-known multistep reaction in bulk phase. The first-principles computations verify that the surfacial relaxation of Li2S to form an anti-fluorite structure on higher electric conductive LixMoS(2) surface is the primarily thermodynamic driving force for activating the above-mentioned reaction. These results are envisaged to be helpful for designing durable conversion-type MoS2 anodes by surface engineering, and the hierarchical tubular feature further points out a new protocol for graphene based hybrid anode for enhanced lithium-ion batteries.

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作者机构:

  • [ 1 ] [Li, Yonghe]Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing 100124, Peoples R China
  • [ 2 ] [Cheng, Xiaopeng]Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing 100124, Peoples R China
  • [ 3 ] [Liu, Xianqiang]Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing 100124, Peoples R China
  • [ 4 ] [Zhang, Bin]Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing 100124, Peoples R China
  • [ 5 ] [Sun, Dongsheng]Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing 100124, Peoples R China
  • [ 6 ] [Zhang, Yuefei]Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing 100124, Peoples R China
  • [ 7 ] [Liu, Zhun]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 8 ] [Wang, Ruzhi]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China

通讯作者信息:

  • 王如志 张跃飞

    [Zhang, Yuefei]Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing 100124, Peoples R China;;[Wang, Ruzhi]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China

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来源 :

ENERGY STORAGE MATERIALS

ISSN: 2405-8297

年份: 2017

卷: 9

页码: 188-194

2 0 . 4 0 0

JCR@2022

被引次数:

WoS核心集被引频次: 19

SCOPUS被引频次: 21

ESI高被引论文在榜: 0 展开所有

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