Building a Better Li-Garnet Solid Electrolyte/Metallic Li Interface with Antimony

被引:107
作者
Dubey, Romain [1 ,2 ]
Sastre, Jordi [2 ]
Cancellieri, Claudia [3 ]
Okur, Faruk [1 ,2 ]
Forster, Alexander [1 ,2 ]
Pompizii, Lea [1 ,2 ]
Priebe, Agnieszka [4 ]
Romanyuk, Yaroslav E. [2 ]
Jeurgens, Lars P. H. [3 ]
Kovalenko, Maksym, V [1 ,2 ]
Kravchyk, Kostiantyn, V [1 ,2 ]
机构
[1] Swiss Fed Inst Technol, Lab Inorgan Chem, Dept Chem & Appl Biosci, CH-8093 Zurich, Switzerland
[2] Empa Swiss Fed Labs Mat Sci & Technol, Lab Thin Films & Photovolta, CH-8600 Dubendorf, Switzerland
[3] Empa Swiss Fed Labs Mat Sci & Technol, Lab Joining Technol & Corros, CH-8600 Dubendorf, Switzerland
[4] Empa Swiss Fed Labs Mat Sci & Technol, Lab Mech Mat & Nanostruct, Feuerwerkerstr 39, CH-3602 Thun, Switzerland
关键词
antimony; critical current density; interfacial layers; Li-ion batteries; LLZO; solid-state batteries; symmetrical cells; LITHIUM METAL ANODE; IONIC-CONDUCTIVITY; KINETIC-PARAMETERS; SURFACE-CHEMISTRY; STATE BATTERIES; AIR; MECHANISMS; RESISTANCE; DIFFUSION; ELECTRODES;
D O I
10.1002/aenm.202102086
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The deployment of Li-garnet Li7La3Zr2O12 (LLZO) solid-state electrolytes in solid-state batteries is severely hampered by their poor wettability with metallic Li. In this work, Sb is presented as a compelling interfacial layer allowing superior wetting of Li onto a LLZO surface, resulting in a remarkably low Li/LLZO interfacial resistance of 4.1(1) omega cm(2). An atomistic insight into Sb-coated LLZO interface using soft and hard X-ray photoelectron spectroscopy and focused ion beam time-of-flight secondary ion mass spectrometry shows the formation of a Li-Sb alloy as an interlayer. It is determined that the Li/Sb-coated LLZO/Li symmetrical cells exhibit a high critical current density of up to 0.64 mA cm(-2) and low overpotentials of 40-50 mV at a current density of 0.2 mA cm(-2) without applying external pressure. The electrochemical performance of Sb coated-LLZO pellets is also assessed with an intercalation-type V2O5 cathode. Li/Sb-coated-LLZO/V2O5 full cells deliver stable capacities of around 0.45 mAh cm(-2), with a peak current density of 0.3 mA cm(-2).
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页数:12
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