Non‐Metallic NH<sub>4</sub><sup>+</sup>/H<sup>+</sup> Co‐Storage in Organic Superstructures for Ultra‐Fast and Long‐Life Zinc‐Organic Batteries
Yehui Zhang, Ziyang Song, Ling Miao, Yaokang Lv, Lihua Gan, Mingxian Liu
Abstract
Abstract Compared with Zn 2+ storage, non‐metallic charge carrier with small hydrated size and light weight shows fast dehydration and diffusion kinetics for Zn‐organic batteries. Here we first report NH 4 + /H + co‐storage in self‐assembled organic superstructures (OSs) by intermolecular interactions of p ‐benzoquinone (BQ) and 2, 6‐diaminoanthraquinone (DQ) polymer through H‐bonding and π–π stacking. BQ‐DQ OSs exhibit exposed quadruple‐active carbonyl motifs and super electron delocalization routes, which are redox‐exclusively coupled with high‐kinetics NH 4 + /H + but exclude sluggish and rigid Zn 2+ ions. A unique 4e − NH 4 + /H + co‐coordination mechanism is unravelled, giving BQ‐DQ cathode high capacity (299 mAh g −1 at 1 A g −1 ), large‐current tolerance (100 A g −1 ) and ultralong life (50,000 cycles). This strategy further boosts the capacity to 358 mAh g −1 by modulating redox‐active building units, giving new insights into ultra‐fast and stable NH 4 + /H + storage in organic materials for better Zn batteries.