材料科学
钒
阳极
阴极
储能
水溶液
纳米复合材料
化学工程
插层(化学)
纳米结构
电极
纳米技术
电化学
无机化学
冶金
化学
物理化学
工程类
功率(物理)
物理
量子力学
作者
Changsheng Zhang,Yeying Li,Xianjie Liu,Ruping Yang,Jin Yu Qiu,Jingkun Xu,Baoyang Lu,Johanna Rosén,Leiqiang Qin,Junxiang Jiang
标识
DOI:10.1002/advs.202401252
摘要
Abstract Aqueous zinc‐ion batteries (AZIBs) based on vanadium oxides or sulfides are promising candidates for large‐scale rechargeable energy storage due to their ease of fabrication, low cost, and high safety. However, the commercial application of vanadium‐based electrode materials has been hindered by challenging problems such as poor cyclability and low‐rate performance. To this regard, sophisticated nanostructure engineering technology is used to adeptly incorporate VS 2 nanosheets into the MXene interlayers to create a stable 2D heterogeneous layered structure. The MXene nanosheets exhibit stable interactions with VS 2 nanosheets, while intercalation between nanosheets effectively increases the interlayer spacing, further enhancing their stability in AZIBs. Benefiting from the heterogeneous layered structure with high conductivity, excellent electron/ion transport, and abundant reactive sites, the free‐standing VS 2 /Ti 3 C 2 T z composite film can be used as both the cathode and the anode of AZIBs. Specifically, the VS 2 /Ti 3 C 2 T z cathode presents a high specific capacity of 285 mAh g −1 at 0.2 A g −1 . Furthermore, the flexible Zn‐metal free in‐plane VS 2 /Ti 3 C 2 T z //MnO 2 /CNT AZIBs deliver high operation voltage (2.0 V) and impressive long‐term cycling stability (with a capacity retention of 97% after 5000 cycles) which outperforms almost all reported Vanadium‐based electrodes for AZIBs. The effective modulation of the material structure through nanocomposite engineering effectively enhances the stability of VS 2 , which shows great potential in Zn 2+ storage. This work will hasten and stimulate further development of such composite material in the direction of energy storage.
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