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High-performance carbon-coated hollow nanocube ZnSe as cathode material for aluminum batteries
Journal of Alloys and Compounds ( IF 5.8 ) Pub Date : 2022-06-22 , DOI: 10.1016/j.jallcom.2022.166006
Xiaohu Yang , Mingjun Chen , Luning Chai , Chen Zhang , Wenming Zhang , Zhanyu Li

Although the cathode materials of aluminum batteries have been extensively valued, their further development has encountered bottlenecks due to their low discharge capacity and low working voltage platform. In this study, we successfully prepare carbon-coated hollow nanocube ZnSe (ZnSe@C) by the selenization process of the zeolitic imidazolate framework (ZIF-67). The energy storage mechanism is found by X-ray photoelectron spectroscopy (XPS) and electrochemical analysis that the reversible reaction Se2-/Sex+ in ZnSe@C can be carried out during the electrochemical cycles. Moreover, the first and second capacities of ZnSe@C are 396.2 and 472.6 mA h g−1 at 0.2 A g−1, respectively. After 100 cycles, the capacity is still as high as 197.1 mA h g−1 at 0.5 A g−1. In addition, the working voltage (1.8 V) is much higher than the other cathode material of aluminum batteries such as oxides, sulfides, and phosphides. Therefore, it is obvious that the carbon-coated ZnSe constructed by ZIF-67 is beneficial to the research for aluminum batteries.



中文翻译:

高性能碳包覆中空纳米立方体ZnSe作为铝电池正极材料

铝电池正极材料虽然受到了广泛的重视,但由于其低放电容量和低工作电压平台,其进一步发展遇到了瓶颈。在这项研究中,我们通过沸石咪唑酯骨架(ZIF-67)的硒化过程成功制备了碳包覆的中空纳米立方体ZnSe(ZnSe@C)。通过X射线光电子能谱(XPS)和电化学分析发现了储能机制,表明ZnSe@C中的可逆反应Se 2- /Se x+可以在电化学循环过程中进行。此外,ZnSe@C 的第一和第二容量在 0.2 A g -1时分别为 396.2 和 472.6 mA hg -1, 分别。在 100 次循环后,容量在 0.5 A g -1时仍高达 197.1 mA hg -1。此外,工作电压(1.8 V)远高于铝电池的其他正极材料,如氧化物、硫化物和磷化物。由此可见,ZIF-67构建的碳包覆ZnSe对铝电池的研究是有利的。

更新日期:2022-06-24
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