Architecting\nV<sub>2</sub>O<sub>5</sub> with a Triune\nCrystal Water–Amorphous–Crystalline Feature for Robust\nZinc-Ion Batteries

The\nnotorious collapse of the electrode structure and\nstrong electrostatic\ninteractions in aqueous zinc-ion batteries (AZIBs) limit the achievement\nof a long cycle life. Herein, by designing an ordered/disordered hybrid\nstructure, we have effectively preserved the integrity of the V<sub>2</sub>O<sub>5</sub>·1.6H<sub>2</sub>O (VOH) electrode. Moreover,\nour approach facilitates the release of stress concentration contributed\nto by the amorphous component, alleviating the strong electrostatic\ninteraction merited by crystal water and promoting the diffusion kinetics\nof Zn<sup>2+</sup> assisted by the crystalline component. Noteworthy,\nthe crystal water serves as an interlayer pillar significantly enhancing\nthe structural stability of the electrode. As a result, our VOH electrode\nexhibits high electrochemical performance. It delivered 227.8 mAh\ng<sup>–1</sup> at a higher current density of 2 A g<sup>–1</sup>, and a high cycle life of 1000 cycles with 95% capacity retention\nwas achieved at a current density of 1 A g<sup>–1</sup>.