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@ARTICLE{Wichmann:907419,
author = {Wichmann, Lennart and Brinkmann, Jan-Paul and Luo, Mingzeng
and Yang, Yong and Winter, Martin and Schmuch, Richard and
Placke, Tobias and Gomez-Martin, Aurora},
title = {{I}mproved {C}apacity {R}etention for a {D}isordered
{R}ocksalt {C}athode via {S}olvate {I}onic {L}iquid
{E}lectrolytes},
journal = {Batteries $\&$ supercaps},
volume = {5},
number = {7},
issn = {2566-6223},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2022-02027},
pages = {e202200075},
year = {2022},
abstract = {Lithium-rich disordered rocksalts (DRX) are a promising
class of cathode materials for high-energy lithium ion
batteries (LIBs) and lithium metal batteries (LMBs) due to
the high initial specific capacities (>200 mAh g−1) as
well as flexible chemical composition. However, challenges
concerning severe capacity fade and voltage decay upon
cycling at high cut-off voltages are still to be overcome.
Moreover, state-of-the-art carbonate-based electrolytes can
be decomposed by reactive oxygen species released by DRX
materials during cycling. In this work, the electrochemical
performance of Li1.25Fe0.5Nb0.25O2 (LFNO) || Li LMB and LFNO
|| graphite LIB cells is compared for a conventional,
carbonate-based electrolyte and the solvate ionic liquid
(SIL) [Li(G3)][TFSI] (G3: triethyleneglycoldimethylether).
Cycle life is notably improved by the chemically more stable
ionic liquid electrolyte, as the anionic redox activity of
LFNO is prolonged compared to the carbonate-based cells.
This work represents an important step toward an improved
cycle life of DRX cathodes.},
cin = {IEK-12},
ddc = {620},
cid = {I:(DE-Juel1)IEK-12-20141217},
pnm = {1221 - Fundamentals and Materials (POF4-122)},
pid = {G:(DE-HGF)POF4-1221},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000787102500001},
doi = {10.1002/batt.202200075},
url = {https://juser.fz-juelich.de/record/907419},
}