2024/02/27 by Xin Chen, Xixiang Zhang, Chen, Xin +5
Engineering · Chemistry · #Extraction and Separation Processes #Advancements in Battery Materials #Zeolite Catalysis and Synthesis
paper · pdf · doi:10.48550/arxiv.2402.17557
Ionic conductors have great potential for interesting tunable physical properties via ionic liquid gating and novel energy storage applications such as all-solid-state lithium batteries. In particular, low migration barriers and high hopping attempt frequency are the keys to achieve fast ion diffusion in solids. Taking advantage of the oxygen-vacancy channel in Lix\mathrmSr2Co2O5, we show that migration barriers of lithium ion are as small as 0.28~0.17eV depending on the lithium concentration rates. Our first-principles calculation also investigated hopping attempt frequency and concluded the room temperature ionic diffusivity and ion conductivity is high as 10-7∼10-6~\mathrmcm2~s-1 and 10-3∼10-2~\mathrmS⋅cm-1 respectively, which outperform most of perovskite-type, garnet-type and sulfide Li-ion solid-state electrolytes. This work proves Lix\mathrmSr2Co2O5 as a promising super-ionic conductor.