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@ARTICLE{Gao:1024808,
author = {Gao, Ping and Zhang, Fei and Wang, Xingchao and Wu,
Miaomiao and Xiang, Qian and Yang, Aikai and Sun, Ying and
Guo, Jixi and Huang, Yudai},
title = {{U}ltrastable {D}endrite-{F}ree {P}otassium {M}etal
{B}atteries {E}nabled by {W}eakly-{S}olvated {E}lectrolyte},
journal = {ACS nano},
volume = {17},
number = {20},
issn = {1936-0851},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2024-02474},
pages = {20325 - 20333},
year = {2023},
abstract = {Potassium (K) metal is considered one of the most promising
anodes for potassium metal batteries (PMBs) because of its
abundant and low-cost advantages but suffers from serious
dendritic growth and parasitic reactions, resulting in poor
cyclability, low Coulombic efficiency (CE), and safety
concerns. In this work, we report a localized
high-concentration electrolyte (LHCE) consisting of
potassium bis(fluorosulfonyl)imide (KFSI) in a cosolvent of
1,2-dimethoxyethane (DME) and
1,1,2,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether
(TTE) to solve the problems of PMBs. TTE as a diluent not
only endows LHCE with advantages of low viscosity, good
wettability, and improved conductivity but also solves the
dendrite problem pertaining to K metal anodes. Using the
formulation of LHCE, a CE of $98\%$ during 800 cycles in the
K||Cu cell and extremely stable cycling of over 2000 h in
the K||K symmetric cell are achieved at a current density of
0.1 mA cm–2. In addition, the LHCE shows good
compatibility with a Prussian Blue cathode, allowing almost
$99\%$ CE for the K||KFeIIFeIII(CN)6 full cell during 100
cycles. This promising electrolyte design realizes
high-safety and energy-dense PMBs.},
cin = {IEK-1},
ddc = {540},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {1222 - Components and Cells (POF4-122)},
pid = {G:(DE-HGF)POF4-1222},
typ = {PUB:(DE-HGF)16},
pubmed = {37830495},
UT = {WOS:001090952700001},
doi = {10.1021/acsnano.3c06368},
url = {https://juser.fz-juelich.de/record/1024808},
}