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@ARTICLE{McCalla:202017,
author = {McCalla, E. and Prakash, A. S. and Berg, E. and Saubanere,
M. and Abakumov, A. M. and Foix, D. and Klobes, B. and
Sougrati, M.-T. and Rousse, G. and Lepoivre, F. and
Mariyappan, S. and Doublet, M.-L. and Gonbeau, D. and Novak,
P. and Van Tendeloo, G. and Tarascon, J.-M. and Hermann,
Raphael},
title = {{R}eversible {L}i-{I}ntercalation through {O}xygen
{R}eactivity in {L}i-{R}ich {L}i-{F}e-{T}e {O}xide
{M}aterials},
journal = {Journal of the Electrochemical Society},
volume = {162},
number = {7},
issn = {1945-7111},
address = {Pennington, NJ},
publisher = {Electrochemical Soc.},
reportid = {FZJ-2015-04306},
pages = {A1341 - A1351},
year = {2015},
abstract = {Lithium-rich oxides are a promising class of positive
electrode materials for next generation lithium-ion
batteries, and oxygen plays a prominent role during
electrochemical cycling either by forming peroxo-like
species and/or by irreversibly forming oxygen gas during
first charge. Here, we present Li-Fe-Te-O materials which
show a tremendous amount of oxygen gas release. This oxygen
release accounts for nearly all the capacity during the
first charge and results in vacancies as seen by
transmission electron microscopy. There is no oxidation of
either metal during charge but significant changes in their
environments. These changes are particularly extreme for
tellurium. XRD and neutron powder diffraction both show
limited changes during cycling and no appreciable change in
lattice parameters. A density functional theory study of
this material is performed and demonstrates that the holes
created on some of the oxygen atoms upon oxidation are
partially stabilized through the formation of shorter O-O
bonds, i.e. (O2)n– species which on further delithiation
show a spontaneous O2 de-coordination from the cationic
network and migration to the now empty lithium layer. The
rate limiting step during charge is undoubtedly the
diffusion of oxygen either out along the lithium layer or
via columns of oxygen atoms.},
cin = {JCNS-2 / PGI-4 / JARA-FIT},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
$I:(DE-82)080009_20140620$},
pnm = {144 - Controlling Collective States (POF3-144) / 524 -
Controlling Collective States (POF3-524) / 6213 - Materials
and Processes for Energy and Transport Technologies
(POF3-621) / 6G4 - Jülich Centre for Neutron Research
(JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-144 / G:(DE-HGF)POF3-524 /
G:(DE-HGF)POF3-6213 / G:(DE-HGF)POF3-6G4},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000355643700030},
doi = {10.1149/2.0991507jes},
url = {https://juser.fz-juelich.de/record/202017},
}