MoOx nanoparticles anchored on N-doped porous carbon as Li-ion battery electrode

Zhi Li, Chao Wang, Xiuzheng Chen, Xixi Wang, Xingyun Li, Yusuke Yamauchi, Xuejun Xu, Jie Wang, Chunfu Lin, Dong Luo, Xianfen Wang, Xiu Song Zhao

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

Abstract

Transition-metal oxides based materials have recently been shown to be promising anode material for lithium ion batteries (LIBs) application to replace graphite material. In the present work, highly dispersed ultra-small MoOx nanoparticles anchored on N-doped three-dimensional (3D) hierarchically porous carbon (3D-MoOx@CN) are prepared on the basis of an efficient in-situ chelating and hard-templating strategy. The MoOx nanoparticles with particle sizes between 1.5 and 3.5 nm are observed to be anchored on the surface of the 3D N-doped carbon. The 3D-MoOx@CN composite anode electrode exhibits several appealing characteristics for lithium ion storage, including high specific capacity, good stability against cycling and fast charge transport kinetics. An optimized 3D-MoOx@CN sample (3D-MoOx@CN-700) delivers specific capacities of 742 mAh g−1 at current density of 100 mA g−1 and 431 mAh g−1 at 1000 mA g−1 after 1000 cycles, respectively. The observed excellent performance is due to the unique hierarchical pore structure with strong binding of the ultra-small MoOx nanoparticles onto N-doped carbon surface, which can avoid the agglomeration and alleviate the volume expansion of MoOx nanoparticles in the charge-discharge process. The composite electrode material described in this work holds a great potential for the development of high-performance lithium-ion batteries. Meanwhile, the synthesis method presents a common strategy to prepare other composite materials with highly dispersed metal oxide on the hierarchically porous carbon materials.

Original languageEnglish
Article number122588
JournalChemical Engineering Journal
Volume381
DOIs
Publication statusPublished - 2020 Feb 1
Externally publishedYes

Keywords

  • Composite
  • Hierarchically porous carbon
  • Lithium-ion batteries
  • Molybdenum oxides

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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