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

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 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). Finally, 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.
Authors:
 [1] ;  [2] ; ORCiD logo [3] ; ORCiD logo [3] ;  [4] ; ORCiD logo [1]
  1. Univ. of New Hampshire, Durham, NH (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Forschungszentrum Juelich GmbH, Juelich (Germany)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 8; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Scientific User Facilities Division; National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; batteries
OSTI Identifier:
1372072

Charles, Daniel Scott, Feygenson, Mikhail, Page, Katharine, Neuefeind, Joerg, Xu, Wenqian, and Teng, Xiaowei. Structural water engaged disordered vanadium oxide nanosheets for high capacity aqueous potassium-ion storage. United States: N. p., Web. doi:10.1038/ncomms15520.
Charles, Daniel Scott, Feygenson, Mikhail, Page, Katharine, Neuefeind, Joerg, Xu, Wenqian, & Teng, Xiaowei. Structural water engaged disordered vanadium oxide nanosheets for high capacity aqueous potassium-ion storage. United States. doi:10.1038/ncomms15520.
Charles, Daniel Scott, Feygenson, Mikhail, Page, Katharine, Neuefeind, Joerg, Xu, Wenqian, and Teng, Xiaowei. 2017. "Structural water engaged disordered vanadium oxide nanosheets for high capacity aqueous potassium-ion storage". United States. doi:10.1038/ncomms15520. https://www.osti.gov/servlets/purl/1372072.
@article{osti_1372072,
title = {Structural water engaged disordered vanadium oxide nanosheets for high capacity aqueous potassium-ion storage},
author = {Charles, Daniel Scott and Feygenson, Mikhail and Page, Katharine and Neuefeind, Joerg and Xu, Wenqian and Teng, Xiaowei},
abstractNote = {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 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). Finally, 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.},
doi = {10.1038/ncomms15520},
journal = {Nature Communications},
number = ,
volume = 8,
place = {United States},
year = {2017},
month = {5}
}

Works referenced in this record:

Nickel Hexacyanoferrate Nanoparticle Electrodes For Aqueous Sodium and Potassium Ion Batteries
journal, December 2011
  • Wessells, Colin D.; Peddada, Sandeep V.; Huggins, Robert A.
  • Nano Letters, Vol. 11, Issue 12, p. 5421-5425
  • DOI: 10.1021/nl203193q

Potassium secondary cell based on Prussian blue cathode
journal, February 2004