TY - JOUR
T1 - Molecular Engineering of Covalent Organic Framework Cathodes for Enhanced Zinc-Ion Batteries
AU - Wang, Wenxi
AU - Kale, Vinayak Swamirao
AU - Cao, Zhen
AU - Lei, Yougjiu
AU - Kandambeth, Sharath
AU - Zou, Guodong
AU - Zhu, Yunpei
AU - Abou-Hamad, Edy
AU - Shekhah, Osama
AU - Cavallo, Luigi
AU - Eddaoudi, Mohamed
AU - Alshareef, Husam N.
N1 - KAUST Repository Item: Exported on 2021-08-10
Acknowledged KAUST grant number(s): OSR-CRG2017-3379
Acknowledgements: Research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST) under award number OSR-CRG2017-3379. The computational work was performed on KAUST supercomputers.
PY - 2021/8/8
Y1 - 2021/8/8
N2 - Covalent organic frameworks (COFs) are potentially promising electrode materials for electrochemical charge storage applications thanks to their pre-designable reticular chemistry with atomic precision, allowing precise control of pore size, redox-active functional moieties, and stable covalent frameworks. However, studies on the mechanistic and practical aspects of their zinc-ion storage behavior are still limited. In this study, a strategy to enhance the electrochemical performance of COF cathodes in zinc-ion batteries (ZIBs) by introducing the quinone group into 1,4,5,8,9,12-hexaazatriphenylene-based COFs is reported. Electrochemical characterization demonstrates that the introduction of the quinone groups in the COF significantly pushes up the Zn2+ storage capability against H+ and elevates the average (dis-)charge potential in aqueous ZIBs. Computational and experimental analysis further reveals the favorable redox-active sites that host Zn2+/H+ in COF electrodes and the root cause for the enhanced electrochemical performance. This work demonstrates that molecular engineering of the COF structure is an effective approach to achieve practical charge storage performance.
AB - Covalent organic frameworks (COFs) are potentially promising electrode materials for electrochemical charge storage applications thanks to their pre-designable reticular chemistry with atomic precision, allowing precise control of pore size, redox-active functional moieties, and stable covalent frameworks. However, studies on the mechanistic and practical aspects of their zinc-ion storage behavior are still limited. In this study, a strategy to enhance the electrochemical performance of COF cathodes in zinc-ion batteries (ZIBs) by introducing the quinone group into 1,4,5,8,9,12-hexaazatriphenylene-based COFs is reported. Electrochemical characterization demonstrates that the introduction of the quinone groups in the COF significantly pushes up the Zn2+ storage capability against H+ and elevates the average (dis-)charge potential in aqueous ZIBs. Computational and experimental analysis further reveals the favorable redox-active sites that host Zn2+/H+ in COF electrodes and the root cause for the enhanced electrochemical performance. This work demonstrates that molecular engineering of the COF structure is an effective approach to achieve practical charge storage performance.
UR - http://hdl.handle.net/10754/670490
UR - https://onlinelibrary.wiley.com/doi/10.1002/adma.202103617
U2 - 10.1002/adma.202103617
DO - 10.1002/adma.202103617
M3 - Article
C2 - 34365688
SN - 0935-9648
SP - 2103617
JO - Advanced Materials
JF - Advanced Materials
ER -