Abstract
The two-dimensional structural features of covalent organic frameworks (COFs) can promote the electrochemical storage of cations like H
, Li
, and Na
through both faradaic and non-faradaic processes. However, the electrochemical storage of cations like Zn
ion is still unexplored although it bears a promising divalent charge. Herein, for the first time, we have utilized hydroquinone linked β-ketoenamine COF acting as a Zn
anchor in an aqueous rechargeable zinc ion battery. The charge-storage mechanism comprises of an efficient reversible interlayer interaction of Zn
ions with the functional moieties in the adjacent layers of COF (-182.0 kcal mol
). Notably, due to the well-defined nanopores and structural organization, a constructed full cell, displays a discharge capacity as high as 276 mA h g
at a current rate of 125 mA g
.