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The loofah-like LaMnO 3 perovskite is for the first time demonstrated to be cathode material for ZIBs with long cycle life. [Display omitted] Due to high safety and excellent rate performance, the aqueous Zn-ion battery is a promising energy storage battery for practical application. However, most manganese-based compounds suffer from poor cycling and rate performance. Herein, a new concept of Zn-ions battery is assembled with the loofah-like LaMnO 3 perovskite as a novel cathode, achieving fast ion kinetics through the co-intercalation of Zn2+ and H+ cations. In this work, the Ni-doping strategy is adopted to improve the electrochemical performance of LaMnO 3 perovskite as a cathode material for Zn-ion batteries. The resultant LaNi x Mn 1-x O 3 (x = 0.2) exhibits a superior capacity of 226 mAh g−1 after 80 cycles at 100 mA g−1 and high working voltages at 1.4 V and 1.26 V vs. Zn2+/Zn in the electrolyte of 2 M ZnSO 4 + 0.2 M MnSO 4. Even at 500 mA g−1, the new Zn/LaNi x Mn 1-x O 3 battery still delivers a discharge capacity of 113 mAh g−1 after 1000 cycles. At medium current density, the electrochemical process of the LaNi x Mn 1-x O 3 (x = 0.2) electrode is co-controlled by the solid diffusive and surface-capacitive process with a fast ion diffusion rate. The lanthanum manganese perovskite is a potential cathode material for Zn-ion batteries with long cycle performance and high rate cyclability. This work significantly opens up the way of perovskite materials as new cathodes for high-rate ZIBs. [ABSTRACT FROM AUTHOR]

A method to generate honeycomb pattern on polymer films is demonstrated. Briefly, a polymer solution in a volatile solvent containing a nonvolatile liquid solute is cast into a thin layer, with the fast evaporation of the volatile solvent, the liquid solute is enriched at the top surface of the layer. The enriched liquid solute condenses into uniform droplets after reaching its saturation state, meanwhile, the polymer precipitates at the interface of the droplets. With this method, we prepared the honeycomb-patterned polysulfone, polystyrene, and polyvinylidene fluoride films. This method provides a new approach to manipulate the surface geometry of polymer films. [ABSTRACT FROM AUTHOR]