DOI: 10.1039/d6sc05379c ISSN: 2041-6520
Interstitial oxide-ion conduction with unconventional polyhedral units in Bi 2− x Te
Lu Liang, Jinxin Ge, Hankun Xu, Yue Zhu, Jie Chen, Zhijian Tan, Changjian Li, Xiaohui Li, Kun Lin, Xiaojun Kuang, Qiang Li, Xianran XingLone-pair-induced local free volume in layered Bi 1.9 Te 1.1 O 5.05 stabilizes interstitial oxygen and enables two-dimensional oxide-ion transport. This design delivers an oxide ion conductivity of 1.41 × 10 −3 S cm −1 at 650 °C, providing a new strategy for developing interstitial oxide-ion conductors.