MIL‐47(V) Derived V2O5@Carbon Core‐Shell Microcuboids with Oxygen Vacancies as Advanced Conversion Cathodes for High‐Performance Zinc‐Ion Batteries

• DOI: 10.1002/celc.202200178
• Publication Date: 2022-04-13T14:47:10Z
• Authors: Tianqi He; Jinhang Li; Zhengzhi Luo; Yuqiang Zhang; Yingying Zhao; Xitian Zhang; Yujin Chen
• Keywords: Carbon fibers; Pentoxide

Abstract Vanadium pentoxide (V 2 O 5 ) has been considered one of the most promising cathodes for zinc‐ion batteries (ZIBs) due to its outstanding theoretical capacity (589 mAh g −1 ). However, it remains great challenge achieve high capacity, limited poor electronic conductivity and sluggish ionic diffusion kinetics V . Herein, a controllable strategy is proposed synthesize @carbon core‐shell microcuboids with oxygen vacancies 5‐ x @CCSMs) derived from MIL‐47(V) used ZIBs. The obtained @CCSMs cathode delivers capacities 485.4 392.1 at 0.1 2.0 A , respectively. superior electrochemical performances originate nano‐sized particles carbon shell. Further, ex‐situ XRD indicates undergoes shrinking core model conversion reaction initial cycling new phase Zn 3 7 (OH) ⋅ 2H O, which an ideal host 2+ Our work offers innovative develop high‐capacity in