Topological Chitosan Framework Enables Reversible Columnar Array Anodes for High-Performance Aqueous Zinc Batteries

• • The D-CTS-Zn anode enables Zn||Zn symmetric cells to cycle over 3000 cycles at 200 mA cm−2 with 60% depth of discharge, a benchmark that exceeds typical commercial targets (>1000 cycles) and demonstrates exceptional stability under aggressive conditions. • • The integrated D-CTS-Zn||MnO2 battery achieves an energy density of 83 Wh kg−1 at an ultrahigh power density of 9.25 kW kg−1, indicating that the design effectively decouples energy and power limitations, which is critical for high-rate applications. • • The double-layer topological chitosan framework (D-CTS) is fabricated via multistage coordination-neutralization electrophoresis, coupling instantaneous and delayed phase separation to form vertical through-hole arrays—a scalable, low-cost manufacturing approach compared to conventional directional freezing methods. • • The embedded interconnected nanonetworks within the through-hole walls provide a lateral ion compensation mechanism, ensuring uniform ion flux and dynamic equilibrium of the columnar zinc array, which mitigates dendrite growth and structural collapse even at high DOD.