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@ARTICLE{Charles:837288,
author = {Charles, Daniel Scott and Feygenson, Mikhail and Page,
Katharine and Neuefeind, Joerg and Xu, Wenqian and Teng,
Xiaowei},
title = {{S}tructural water engaged disordered vanadium oxide
nanosheets for high capacity aqueous potassium-ion storage},
journal = {Nature Communications},
volume = {8},
issn = {2041-1723},
address = {London},
publisher = {Nature Publishing Group},
reportid = {FZJ-2017-06257},
pages = {15520 -},
year = {2017},
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.},
cin = {ICS-1 / Neutronenstreuung ; JCNS-1},
ddc = {500},
cid = {I:(DE-Juel1)ICS-1-20110106 / I:(DE-Juel1)JCNS-1-20110106},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551) /
6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6215 - Soft Matter, Health and Life Sciences (POF3-621)},
pid = {G:(DE-HGF)POF3-551 / G:(DE-HGF)POF3-6G4 /
G:(DE-HGF)POF3-6215},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000401849900001},
doi = {10.1038/ncomms15520},
url = {https://juser.fz-juelich.de/record/837288},
}