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Structural water engaged disordered vanadium oxide nanosheets for high capacity aqueous potassium-ion storage

Author

Listed:
  • Daniel Scott Charles

    (University of New Hampshire)

  • Mikhail Feygenson

    (Oak Ridge National Laboratory
    Juelich Centre for Neutron Science, Forschungszentrum Juelich GmbH)

  • Katharine Page

    (Oak Ridge National Laboratory)

  • Joerg Neuefeind

    (Oak Ridge National Laboratory)

  • Wenqian Xu

    (Advanced Photon Source, Argonne National Laboratory)

  • Xiaowei Teng

    (University of New Hampshire)

Abstract

Aqueous electrochemical energy storage devices using potassium-ions as charge carriers are attractive due to their superior safety, lower cost and excellent transport properties compared to other alkali ions. However, the accommodation of potassium-ions with satisfactory capacity and cyclability is difficult because the large ionic radius of potassium-ions causes structural distortion and instabilities even in layered electrodes. Here we report that water induces structural rearrangements of the vanadium-oxygen octahedra and enhances stability of the highly disordered potassium-intercalated vanadium oxide nanosheets. The vanadium oxide nanosheets engaged by structural water achieves high capacity (183 mAh g−1 in half-cells at a scan rate of 5 mV s−1, corresponding to 0.89 charge per vanadium) and excellent cyclability (62.5 mAh g−1 in full cells after 5,000 cycles at 10 C). The promotional effects of structural water on the disordered vanadium oxide nanosheets will contribute to the exploration of disordered structures from earth-abundant elements for electrochemical energy storage.

Suggested Citation

  • Daniel Scott Charles & Mikhail Feygenson & Katharine Page & Joerg Neuefeind & Wenqian Xu & Xiaowei Teng, 2017. "Structural water engaged disordered vanadium oxide nanosheets for high capacity aqueous potassium-ion storage," Nature Communications, Nature, vol. 8(1), pages 1-8, August.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms15520
    DOI: 10.1038/ncomms15520
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    Cited by:

    1. Zhuoheng Bao & Chengjie Lu & Qiang Liu & Fei Ye & Weihuan Li & Yang Zhou & Long Pan & Lunbo Duan & Hongjian Tang & Yuping Wu & Linfeng Hu & ZhengMing Sun, 2024. "An acetate electrolyte for enhanced pseudocapacitve capacity in aqueous ammonium ion batteries," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    2. Kangkang Ge & Hui Shao & Encarnacion Raymundo-Piñero & Pierre-Louis Taberna & Patrice Simon, 2024. "Cation desolvation-induced capacitance enhancement in reduced graphene oxide (rGO)," Nature Communications, Nature, vol. 15(1), pages 1-10, December.

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