| Title | Borates as a new direction in the design of oxide ion conductors |
| Authors | Li, Xiaohui Yang, Li Zhu, Zhenyu Wang, Xiaoge Chen, Pohua Huang, Senchuan Wei, Xianyi Cai, Guohong Manuel, Pascal Yang, Sihai Lin, Jianhua Kuang, Xiaojun Sun, Junliang |
| Affiliation | Guilin Univ Technol, Coll Chem & Bioengn, Guangxi Key Lab Electrochem & Magnetochem Funct M, Guilin 541004, Peoples R China Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci BNLMS, Beijing 100871, Peoples R China Guilin Univ Technol, Coll Mat Sci & Engn, Guangxi Univ Key Lab Nonferrous Met Oxide Elect F, Guangxi Key Lab Opt & Elect Mat & Devices,MOE Key, Guilin 541004, Peoples R China Sun Yat Sen Univ, Sch Chem, MOE Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Peoples R China Sci & Technol Facil Council STFC, Rutherford Appleton Lab, ISIS Facil, Chilton OX11 0QX, England Univ Manchester, Dept Chem, Manchester M13 9PL, Lancs, England |
| Keywords | CRYSTAL-STRUCTURE PHASE-TRANSITION TEMPERATURE CONDUCTIVITY ELECTROLYTES DYNAMICS FAMILY |
| Issue Date | May-2022 |
| Publisher | SCIENCE CHINA-MATERIALS |
| Abstract | Lowering the operating temperature of solid oxide fuel cells (SOFCs) has extensively stimulated the development of new oxide ion conductors. Here, inspired by the structural commonalities of oxide ion conductors, the inability to accommodate oxygen vacancies in the rigid, isolated, 3-fold tetrahedral rings of SrSi/GeO3-based materials, and the considerable flexibility of BOn polyhedra in terms of coordination number, rotation, deformation, and linkage, we report the first borate-base family of oxide ion conductors, (Gd/Y)(1-x)ZnxBO3-0.5x, through combined computational prediction and experimental verification. The oxygen vacancies in (Gd/Y)BO3 can be accommodated by forming B3O8 units in isolated, 3-fold, tetrahedral rings of B3O9 and transported through a cooperative mechanism of oxygen exchange between the B3O9 and B3O8 units, which is assisted by the intermediate opening and extending of these units. This study opens a new scientific field of the borate system for designing and discovering oxide ion conductors. |
| URI | http://hdl.handle.net/20.500.11897/647386 |
| ISSN | 2095-8226 |
| DOI | 10.1007/s40843-022-2044-3 |
| Indexed | SCI(E) |
| Appears in Collections: | å å¦ä¸ å å å·¥ç¨ å¦é ¢ |
