期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 50, 页码 60084-60091出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c20884
关键词
porous proton conductors; MOF-802; CDs; water-retention capacity; proton conduction
资金
- National Natural Science Foundation of China [22101131, 21901116, 21771104]
- Natural Science Foundation of Jiangsu Province [BK20210543]
- China Postdoctoral Science Foundation [2021M691553]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
This study successfully improved the water-retention capacity and proton conductivity of proton conductors by hybridizing hydrophilic carbon dots with high proton conductivity MOF-802, making CDs@MOF-802 one of the most efficient MOF proton conductors reported so far.
Crystalline porous materials, such as metal-organic frameworks (MOFs) and covalent organic frameworks (COFs), have been demonstrated to be versatile material platforms for the development of solid proton conductors. However, most crystalline porous proton conductors suffer from decreasing proton conductivity with increasing temperature due to releasing water molecules, and this disadvantage severely restricts their practical application in electrochemical devices. In this work, for the first time, hydrophilic carbon dots (CDs) were utilized to hybridize with high proton conductivity MOF-802, which is a model of MOF proton conductors, aiming to improve its water-retention capacity and thus enhance proton conduction. The resultant CDs@MOF-802 exhibits impregnable proton conduction with increasing temperature, and the proton conductivity reaches 10(-1) S cm(-1), much superior to that of MOF-802, making CDs@MOF-802 one of the most efficient MOF proton conductors reported so far. This study provides a new strategy to improve the water-retention capacity of porous proton conductors and further realize excellent proton conduction.
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