Solid Li-ion conducting electrolytes are one pathway towards future, energy-dense, intrinsically-safe solid-state batteries. Thus, it is of interest to study novel fast Li-ion solid electrolyte materials. Here we report the synthesis and characterization of a family of spinel structured oxide solid electrolytes[1]. Further, we will report on the interface and mixed electronic-ionic conductivity of the spinel structured solid solution which is formed upon reaction with spinel structured Li-ion battery electrode materials. We detail the compositions that were explored and give the results of the synthesis, densification and the structural, physical and electrochemical characterization. The properties of the new materials will be compared and contrasted to well-known solid Li electrolytes such as garnet and NASICON structured materials.

References

1. Allen, J.L.; Crear, B.A.; Choudhury, R.; Wang, M.J.; Tran, D.T.; Ma, L.; Piccoli, P.M.; Sakamoto, J.; Wolfenstine, J. Fast Li-Ion Conduction in Spinel-Structured Solids. Molecules 2021, 26, 2625. https://doi.org/10.3390/molecules26092625