Argyrodite
Solid Electrolyte with a Stable Interface
and Superior Dendrite Suppression Capability Realized by ZnO Co-Doping
Posted on 2019-10-17 - 21:43
Despite
the high ionic conductivity and good machinability, the
application of sulfide solid electrolytes (SEs) is severely limited
by the poor compatibility of oxide cathodes with Li metals. Herein,
a ZnO co-doping strategy is proposed to enhance the chemical and electrochemical
performance of sulfide SEs. Given the synergistic effect by incorporation
of ZnO, the argyrodite electrolyte achieves superior interfacial stability
and Li dendrite suppression capability. By in-depth ex situ analyses,
the enhancement is ascribed to LiZn and Li3OBr formed in
the argyrodite/Li interface and a reduced electronic conductivity
arising from the ZnO doping. In addition, O doping improves the air
stability for argyrodite without degrading the ionic conductivity
because of the compensation by Zn doping. Hence, all-solid-state batteries
with ZnO-doped electrolytes achieve higher initial Coulombic efficiency
and a larger specific capacity than those of the ZnO-free electrolyte.
ZnO-doped sulfide SEs are promising to develop all-solid-state Li-metal
batteries.
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Chen, Ting; Zhang, Long; Zhang, Zhaoxing; Li, Peng; Wang, Hongqiang; Yu, Chuang; et al. (2019). Argyrodite
Solid Electrolyte with a Stable Interface
and Superior Dendrite Suppression Capability Realized by ZnO Co-Doping. ACS Publications. Collection. https://doi.org/10.1021/acsami.9b13313
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AUTHORS (9)
TC
Ting Chen
LZ
Long Zhang
ZZ
Zhaoxing Zhang
PL
Peng Li
HW
Hongqiang Wang
CY
Chuang Yu
XY
Xinlin Yan
LW
Limin Wang
BX
Bo Xu
KEYWORDS
O dopingStable InterfaceLi metalsSuperior Dendrite Suppression Capability RealizedZnO-free electrolyteLi dendrite suppression capabilityconductivityall-solid-state batteriesZnO dopingCoulombic efficiencyZnO Co-DopingLi 3 OBrZnO-doped electrolytesall-solid-state Li-metal batteriesZnO-doped sulfide SEssulfide SEselectrochemical performanceair stabilityZn dopingoxide cathodesZnO co-doping strategyargyrodite electrolyte