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Published on: November 11, 2013
A Sodium-Ion Full-Cell Battery with Two Individual Covalent Organic Frameworks (COFs) as the Cathode and Anode
Jinglun Yang1, Yuchan Zhang1, Kyungsoo Shin1,2
1Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR 999077, P.R. China.
None:
We present an organic sodium-ion full-cell battery with two redox-active covalent organic frameworks (COFs, CityU-36 and CityU-44) serving as the anode and cathode, respectively. The cathode COF (CityU-44) incorporates a nitro group, delivering a high output voltage, and the anode COF (CityU-36) is functionalized with imidazole units and carbonyl units to maximize the energy density. The integration of the two COF electrodes in a battery cell delivers a reversible capacity of 187 mAh g-1 with 83% retention of the initial capacity after 800 cycles. This work demonstrates that an all-COF-based sodium-ion battery (SIB) with a rational design strategy is a promising candidate for sustainable energy storage.
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