A high-tortuosity holey graphene in-situ derived from cytomembrane/cytoderm boosts ultrastable potassium storage

•A high-tortuosity holey graphene was successfully prepared based on the unique flake structure and chemical composition of cytomembrane and cytoderm.•Benefiting from the unique nanoholes shortening the ion-diffusion length, the synergy of wrinkled and holey structure stabilizing volume fluctuation, the enhanced electronic conductivity and specific surface area.•The anode achieves excellent reversible capacity, and exceptional rate capability with an ultra-long cycle lifespan in PIBs.•The anode exhibits a high energy density as well as considerable cycling stability for potassium-ion full cells.