材料科学
无定形固体
阴极
储能
电化学
水溶液
纳米技术
异质结
电极
离子
电导率
化学工程
光电子学
电气工程
化学
工程类
物理
物理化学
功率(物理)
有机化学
量子力学
作者
Fan Zhao,Siqi Gong,Huiting Xu,Meng Li,Jia Li,Junjie Qi,Honghai Wang,Chunli Li,Wenchao Peng,Jiapeng Liu
标识
DOI:10.1016/j.apsusc.2023.157737
摘要
As candidates of the next generation batteries, aqueous zinc-ion batteries (ZIBs) have drawn widespread attention owing to the advantages of environmental friendliness, low cost and ultrahigh theoretical capacity. In order to obtain superior zinc ions (Zn2+) storage ability, the cathode materials with eminent electrochemical property are placed great expectations. Herein, the hierarchical 3D a-V2O5@Ti3C2Tx microsphere is prepared by a simple spray drying process. In the heterostructure, the amorphous V2O5 not only endows abundant active sites for Zn2+ storage but also effectively alleviates Ti3C2Tx MXene nanosheets restacking. Meanwhile, the presence of conductive Ti3C2Tx MXene framework significantly enhances the conductivity and reaction kinetics of the electrode material. As a result, the 3D a-V2O5@Ti3C2Tx exhibits an impressive Zn2+ storage ability, including the high reversible capacity (604 mAh g−1 at 0.5 A g−1), the superior rate performance and the splendid cycling stability. Furthermore, the relevant mechanism is illustrated via various characterizations. Moreover, the as-fabricated pouch ZIBs based on the 3D a-V2O5@Ti3C2Tx displays a potential practical application prospect as flexible energy storage devices. Hence, this work may provide an inspiration for the rational design of high performance ZIBs cathode materials.
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