材料科学
立方晶系
面子(社会学概念)
电导率
化学物理
凝聚态物理
纳米技术
物理化学
化学
物理
社会学
社会科学
作者
Yu Chen,Zhengyan Lun,Xinye Zhao,Krishna Prasad Koirala,Linze Li,Yan Sun,Christopher A. O’Keefe,Xiaochen Yang,Zijian Cai,Chongmin Wang,Huiwen Ji,Yanting Jin,Bin Ouyang,Gerbrand Ceder
标识
DOI:10.1038/s41563-024-01800-8
摘要
Abstract Oxides with a face-centred cubic (fcc) anion sublattice are generally not considered as solid-state electrolytes as the structural framework is thought to be unfavourable for lithium (Li) superionic conduction. Here we demonstrate Li superionic conductivity in fcc-type oxides in which face-sharing Li configurations have been created through cation over-stoichiometry in rocksalt-type lattices via excess Li. We find that the face-sharing Li configurations create a novel spinel with unconventional stoichiometry and raise the energy of Li, thereby promoting fast Li-ion conduction. The over-stoichiometric Li–In–Sn–O compound exhibits a total Li superionic conductivity of 3.38 × 10 −4 S cm −1 at room temperature with a low migration barrier of 255 meV. Our work unlocks the potential of designing Li superionic conductors in a prototypical structural framework with vast chemical flexibility, providing fertile ground for discovering new solid-state electrolytes.
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