2023 IRG-1: Compositionally complex perovskite oxides: Discovering a new class of solid electrolytes with interface-enabled conductivity improvements
• In IRG-1, Luo and co-workers have discovered a new class of solid electrolytes: compositionally complex perovskite oxides (CCPOs).
• This collaborative study with Pan, Ong, Bowman, and MRSEC students further investigate the fundamental composition-processing-interface-microstructure-property relationship in these CCPOs.
• Specifically, (Li0.375Sr0.4375)(Ta0.375Nb0.375Zr0.125Hf0.125)O3-d (LSTNZH) CCPO has achieved >270% increase in the ionic conductivity in comparison with the state-of-art (Li0.375Sr0.4375)(Ta0.75Zr0.25)O3-d (LSTZ) baseline, while maintaining comparable electrochemical stability.
• Here, Luo and co-workers have established novel strategies of tailoring compositionally complex ceramics (CCCs) via (1) exploiting non-equimolar compositional designs and compositional complexity and (2) controlling microstructures and interfaces (grain boundaries).
• In a broader context, this work suggests transformative new methods to design and tailor CCCs, thereby opening a new window for discovering novel materials for energy storage and many other applications.
S.-T. Ko, D. Zhang, J. Qi, W.-T. Peng, S. P. Ong, J. Luo (UC San Diego)
T. Lee, X. Wang, W. J. Bowman, X. Pan (UC Irvine)
Ko, Lee, Qi, Zhang, Peng, Wang, Tsai, Sun, Wang, Bowman, Ong, Pan, Luo, “Compositionally complex perovskite oxides: Discovering a new class of solid electrolytes with interface-enabled conductivity improvements,” Matter 2023 https://doi.org/10.1016/j.matt.2023.05.035