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 groups (MOF-ClO) as functional enzymes is fabricated to mimic the ultrafluidic lipid-bilayer structure for gating Zn 'on' and anions 'off' states. The MOF-ClO achieved perfect Zn/SO selectivity (∼10), enhanced Zn transfer number ([Formula: see text]) and the ultrafluidic Zn flux (1.9 × 10 vs. 1.67 mmol m s for KcsA). The symmetric cells based on MOF-ClO achieve a lifespan of over 5400 h at 10 mA cm/20 mAh cm. Specifically, the performance of the PMCl-Zn//VO pouch cell keeps 81% capacity after 2000 cycles at 1 A g. The regulated ion transport, by learning from a biological plasma membrane, opens a new avenue towards ultralong lifespan aqueous batteries.
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| http://dx.doi.org/10.1093/nsr/nwae199 | DOI Listing |
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