Non‐Metallic NH4+/H+ Co‐Storage in Organic Superstructures for Ultra‐Fast and Long‐Life Zinc‐Organic Batteries

Abstract

AbstractCompared with Zn2+ 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 NH4+/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 NH4+/H+ but exclude sluggish and rigid Zn2+ ions. A unique 4e− NH4+/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 NH4+/H+ storage in organic materials for better Zn batteries.