Ren Jie, Ran Yan, Yang Zhi Chao, Zhao Huaping, Wang Yude, Lei Yong
School of Materials and Energy, Yunnan University, Kunming, 650091, China.
Fachgebiet Angewandte Nanophysik, Institut für Physik & IMN MacroNano, Technische Universität Ilmenau, 98693, Ilmenau, Germany.
Small. 2023 Nov;19(46):e2303307. doi: 10.1002/smll.202303307. Epub 2023 Jul 19.
Aqueous zinc-ion batteries (AZIBs) have attracted the attention of researchers because of their high theoretical capacity and safety. Among the many vanadium-based AZIB cathode materials, zinc vanadate is of great interest as a typical phase in the dis-/charge process. Here, a remarkable method to improve the utilization rate of zinc vanadate cathode materials is reported. In situ growth of Zn (V O ) on carbon cloth (CC) as the cathode material (ZVO@CC) of AZIBs. Compared with the Zn (V O ) cathode material bonded on titanium foil (ZVO@Ti), the specific capacity increases from 300 to 420 mAh g , and the utilization rate of the material increases from 69.60% to 99.2%. After the flexible device is prepared, it shows the appropriate specific capacity (268.4 mAh g at 0.1 A g ) and high safety. The method proposed in this work improves the material utilization rate and enhances the energy density of AZIB and also has a certain reference for the other electrochemical energy storage devices.
水系锌离子电池（AZIBs）因其高理论容量和安全性而受到研究人员的关注。在众多基于钒的水系锌离子电池正极材料中，钒酸锌作为充/放电过程中的典型相备受关注。在此，报道了一种提高钒酸锌正极材料利用率的显著方法。在碳布（CC）上原位生长Zn（V O ）作为水系锌离子电池的正极材料（ZVO@CC）。与粘结在钛箔上的Zn（V O ）正极材料（ZVO@Ti）相比，比容量从300 mAh g 提高到420 mAh g ，材料利用率从69.60%提高到99.2%。制备出柔性器件后，其显示出合适的比容量（在0.1 A g 时为268.4 mAh g ）和高安全性。本工作中提出的方法提高了材料利用率，提升了水系锌离子电池的能量密度，也为其他电化学储能器件提供了一定的参考。
