Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 49, Pages 16072-16076Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201809907
Keywords
covalent organic frameworks (COFs); ionic sieves; Li-S batteries; organic sodium-ion batteries; pi-pi stacking
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Funding
- National 1000-Talents Program
- National Natural Science Foundation of China [51773071]
- Wuhan Municipal Science and Technology Bureau [2017010201010141]
- Fundamental Research Funds for the Central Universities [HUST: 2017KFYXJJ023, 2017KFXKJC002, 2018KFYXKJC018]
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The shuttle effect of electrode materials always leads to capacity loss and poor cycle life of batteries. Two-dimensional (2D) covalent organic frameworks (COFs) with uniform and controllable nanopores provide a promising strategy for fabricating ionic sieves to inhibit the shuttle effect. However, the insoluble nature of COFs made it difficult to fabricate compact and ordered membranes of COFs. Herein, we report a novel method for facilely anisotropic ordering of 2D COFs via depositing COFs onto graphene. The resulted double-layer membranes acting as ionic sieves impressively inhibit the shuttle effect and exhibit versatility to both organic sodium-ion batteries and Li-S batteries, leading to high cyclability.
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