期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 141, 期 5, 页码 1923-1927出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.8b13551
关键词
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资金
- National Natural Science Foundation of China [21490570, 21674012, 21625102, 21471018]
- Beijing Municipal Science and Technology Project [Z181100004418001]
- Beijing Institute of Technology Research Fund Program
Covalent organic frameworks (COFs) with well-tailored channels are able to accommodate ions and offer their conduction pathway. However, due to strong Coulombic interaction and the lack of transport medium, directly including lithium salts into the channels of COFs results in limited ion transport capability. Herein, we propose a strategy of incorporating low-molecular-weight polyethylene glycol (PEG) into COFs with anionic, neutral, or cationic skeletons to accelerate Li+ conduction. The PEG confined in the well-aligned channels retains high flexibility and Li+ solvating ability. The ion conductivity of PEG included in a cationic COF can reach 1.78 x 10(-3) S cm(-1) at 120 degrees C. The simplicity of this strategy as well as the diversity of crystalline porous materials holds great promise to design high-performance all-solid-state ion conductors.
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