TY - JOUR
T1 - All-in-one improvement toward Li6PS5Br-Based solid electrolytes triggered by compositional tune
AU - Zhang, Zhixia
AU - Zhang, Long
AU - Yan, Xinlin
AU - Wang, Hongqiang
AU - Liu, Yanyan
AU - Yu, Chuang
AU - Cao, Xiaoting
AU - van Eijck, Lambert
AU - Wen, Bin
PY - 2019
Y1 - 2019
N2 - Sulfide solid electrolytes possess high ionic conductivity and moderate dendrite suppression capability, but rather poor compatibility against oxide cathodes and metallic Li. Here, we report O-doped Li6PS5Br as solid electrolyte synthesized by a facile solid-state sintering. Different from other O-incorporated sulfides, the O atoms in Li6PS5-xOxBr prefer to substitute the S atoms at free S2− sites rather than those at the PS4 tetrahedra. Remarkably, without deteriorating the ionic conductivity, this inorganic solid electrolyte with O doping exhibits comprehensively enhanced properties including excellent dendrite suppression capability, superior electrochemical and chemical stability against Li metal as well as high voltage oxide cathodes, and good air stability. Li(Ni0.8Co0.1Mn0.1)O2 and LiCoO2-based all-solid-state batteries with Li6PS4.7O0.3Br electrolyte deliver high specific capacity, superior rate capability, and outstanding cycling stability accompanied with low interfacial resistivity. This type of inorganic solid electrolytes is promising for all-solid-state batteries with high energy density.
AB - Sulfide solid electrolytes possess high ionic conductivity and moderate dendrite suppression capability, but rather poor compatibility against oxide cathodes and metallic Li. Here, we report O-doped Li6PS5Br as solid electrolyte synthesized by a facile solid-state sintering. Different from other O-incorporated sulfides, the O atoms in Li6PS5-xOxBr prefer to substitute the S atoms at free S2− sites rather than those at the PS4 tetrahedra. Remarkably, without deteriorating the ionic conductivity, this inorganic solid electrolyte with O doping exhibits comprehensively enhanced properties including excellent dendrite suppression capability, superior electrochemical and chemical stability against Li metal as well as high voltage oxide cathodes, and good air stability. Li(Ni0.8Co0.1Mn0.1)O2 and LiCoO2-based all-solid-state batteries with Li6PS4.7O0.3Br electrolyte deliver high specific capacity, superior rate capability, and outstanding cycling stability accompanied with low interfacial resistivity. This type of inorganic solid electrolytes is promising for all-solid-state batteries with high energy density.
KW - All-solid-state batteries
KW - Argyrodites
KW - Interfacial stability
KW - Li dendrite suppression
KW - Solid electrolytes
UR - http://www.scopus.com/inward/record.url?scp=85056469555&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2018.11.016
DO - 10.1016/j.jpowsour.2018.11.016
M3 - Article
AN - SCOPUS:85056469555
SN - 0378-7753
VL - 410-411
SP - 162
EP - 170
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -