Abstract
Rechargeable aqueous Zn-ion batteries have been deemed a promising energy storage device. However, the dendrite growth and side reactions have hindered their practical application. Herein, inspired by the ultrafluidic and K(+) ion-sieving flux through enzyme-gated potassium channels (KcsA) in biological plasma membranes, a metal-organic-framework (MOF-5) grafted with -ClO(4) groups (MOF-ClO(4)) as functional enzymes is fabricated to mimic the ultrafluidic lipid-bilayer structure for gating Zn(2+) 'on' and anions 'off' states. The MOF-ClO(4) achieved perfect Zn(2+)/SO(4) (2-) selectivity (∼10), enhanced Zn(2+) transfer number ([Formula: see text]) and the ultrafluidic Zn(2+) flux (1.9 × 10(-3) vs. 1.67 mmol m(-2) s(-1) for KcsA). The symmetric cells based on MOF-ClO(4) achieve a lifespan of over 5400 h at 10 mA cm(-2)/20 mAh cm(-2). Specifically, the performance of the PMCl-Zn//V(2)O(5) pouch cell keeps 81% capacity after 2000 cycles at 1 A g(-1). The regulated ion transport, by learning from a biological plasma membrane, opens a new avenue towards ultralong lifespan aqueous batteries.