期刊
NATURE ENERGY
卷 7, 期 12, 页码 1208-1216出版社
NATURE PORTFOLIO
DOI: 10.1038/s41560-022-01166-8
关键词
-
资金
- Basic Science Center Project of NFSC [51788104]
- Ministry of Science and Technology of China [2021YFE0107900]
- Beijing Nature Science Foundation [Z200007]
- National Key R&D Program of China [2021YFA1400100, 2021YFA1400300]
- National Natural Science Foundation of China [51872155, 11974401]
- Beijing Advanced Innovation Center for Future Chip (ICFC)
- Major Science and Technology Project of Precious Metal Materials Genome Engineering in Yunnan Province [2019ZE001-1]
- CAS Project for Young Scientists in Basic Research [YSBR047]
- Strategic Priority Research Program of Chinese Academy of Sciences of China [XDB33000000]
A solid oxide proton conductor, HSrCoO2.5, shows unusually high proton conductivity between 40°C and 140°C, suggesting the potential use of solid oxide materials as proton-conducting electrolytes in low-temperature devices.
Solid oxide ionic conductors are employed in a wide range of energy-conversion applications, such as electrolytes in fuel cells. Typically, conventional ionic conductors based on metal oxides require elevated temperatures above approximately 500 ? to activate ionic transport, but the ability to operate at lower temperature could avoid mechanical instability and operating complexities. Here we report a solid oxide proton conductor, HSrCoO2.5, which shows unusually high proton conductivity between 40 ? and 140 ?. The proton conductivity was between 0.028 S cm(-1) to 0.33 S cm(-1) in this temperature range, with an ionic activation energy of approximately 0.27 eV. Combining experimental results and first-principles calculations, we attribute these intriguing properties to the high proton concentration and the well-ordered oxygen vacancy channels granted by the hydrogen-intercalated brownmillerite crystalline structure. Our results open the possibility of using solid oxide materials as the proton-conducting electrolytes in low-temperature devices.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据