Building stabilized Cu0.17Mn0.03V2O5−□·2.16H2O cathode enables an outstanding room‐/low‐temperature aqueous Zn‐ion batteries

• DOI: 10.1002/cey2.512
• Publication Date: 2024-03-14T05:40:55Z
• Authors: Ao Wang; Dai‐Huo Liu; Lin Yang; Fang Xu; Dan Luo; Haozhen Dou; Mengqin Song; Chunyan Xu; Beinuo Zhang; Jialin Zheng; Zhongwei Chen; Zhengyu Bai
• Keywords: Vanadium Oxide; Bimetallic strip

Abstract Vanadium oxide cathode materials with stable crystal structure and fast Zn 2+ storage capabilities are extremely important to achieving outstanding electrochemical performance in aqueous zinc‐ion batteries. In this work, a one‐step hydrothermal method was used manipulate the bimetallic ion intercalation into interlayer of vanadium oxide. The pre‐intercalated Cu ions act as pillars pin (V‐O) layers, establishing stabilized two‐dimensional channels for diffusion. occupation Mn between V‐O further expands layer spacing increases concentration oxygen defects (O d ), which boosts diffusion kinetics. As result, as‐prepared 0.17 0.03 V 2 O 5 −□ · 2.16H shows Zn‐storage under room‐ low‐temperature environments (e.g., 440.3 mAh g −1 at room temperature 294.3 −60°C). Importantly, it long cycling life high capacity retention 93.4% over 2500 cycles A −60°C. Furthermore, reversible chemistry mechanisms during discharging/charging processes were revealed via operando X‐ray powder diffraction ex situ Raman characterizations. strategy couple 3d transition metal doping provides solution development superior room‐/low‐temperature vanadium‐based materials.