Abstract

HighlightsA unique dual-ion adsorption mechanism for zinc ion capacitor is enabled by a carbon cathode with defect-rich tissue, dense heteroatom dopant and immense surface area.The active sites on carbon surface for reversible dual-ion adsorption are identified by in-depth characterizations and DFT simulations.The zinc ion capacitor delivers unrivaled combination of high energy and power characteristics. The superb energy, power and cyclability are achieved in multiple cell configurations including coin cell and flexible solid-state pouch-/cable-type cells.

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