Benchmarking the performance of lithiated metal oxide interlayers at the LiCoO2|LLZO interface

PaperPaios
Written By Fluxim AG

Andre Müller, Faruk Okur,ab Abdessalem Aribia, Nicolas Osenciat, Carlos A. F. Vaz, Valerie Siller, Mario El Kazzi, Evgeniia Gilshtein, Moritz H. Futscher, Kostiantyn V. Kravchyk, Maksym V. Kovalenko and Yaroslav E. Romanyuk

Mater. Adv., 2023,4, 2138-2146

Integrating Li7La3Zr2O12 (LLZO) solid-state electrolytes with high-energy cathodes in all-solid-state batteries faces challenges due to diffusion and solid-state reactions at the cathode-electrolyte interface during fabrication. This study explores lithiated Nb, Al, and Ti metal oxide interlayers as diffusion barriers to enhance Li-ion transfer between LiCoO2 and LLZO. These interlayers reduce interfacial impedance from 8 kΩ cm² to 1 kΩ cm², improving battery performance. Li-Nb-O interlayer stands out, delivering the highest discharge capacities.

How Paios was used

Electrochemical impedance spectroscopic measurements were performed between 5 MHz and 1 Hz with an AC amplitude of 50 mV using Paios.

Fluxim AG
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