阴极
水溶液
材料科学
化学工程
钒酸盐
电解质
电化学
插层(化学)
储能
氧化还原
无机化学
化学
电极
冶金
有机化学
物理化学
工程类
功率(物理)
物理
量子力学
作者
Yufen Zhang,Rongyu Guo,Jinjin Wen,Haonan Zhai,Xifan Chen,Wenchao Peng,Jiapeng Liu
标识
DOI:10.1016/j.jcis.2024.03.195
摘要
Currently, aqueous zinc ion batteries (AZIBs) have grown to be a good choice for large-scale energy storage systems due to their high theoretical specific capacity, low redox potential, low cost, and non-toxicity of the aqueous electrolyte. However, it is still challenging to obtain high specific capacity and stability suitable cathodes. Herein, hierarchical self-supporting potassium ammonium vanadate@MXene (KNVO@MXene) hybrid films were prepared by vacuum filtration method. Due to the three-dimensional nanoflower structure of KNVO with dual ions intercalation, high conductivity of two-dimensional Ti3C2Tx MXene, and the hierarchical self-supporting structure, the AZIB based on the KNVO@MXene hybrid film cathode possessed superior specific capacity (481 mAh/g at 0.3 A/g) and cycling stability (retaining 125 mAh/g after 1000 cycles at a high current density of 10 A/g). In addition, the storage mechanism was revealed by various ex-situ characterizations. Hence, a new viewpoint for the preparation of AZIB self-supporting cathode materials is presented.
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