Prabu Samikannu, Vinu Madhan, Chiang Kung-Yuh, Pallavolu Mohan Reddy
Graduate Institute of Environmental Engineering, National Central University, Tao-Yuan City 32001, Taiwan.
Graduate Institute of Environmental Engineering, National Central University, Tao-Yuan City 32001, Taiwan.
J Colloid Interface Sci. 2024 Sep;669:624-636. doi: 10.1016/j.jcis.2024.05.004. Epub 2024 May 8.
Electrodes and electroactive materials are crucial components in the development of supercapacitors due to their geometric properties. In this study, bimetal-organic frameworks (Bi-MOFs, ZIF-8@ZIF-67) were utilized as electrode materials for a high-performance hybrid supercapacitor (HSC) by designing a novel synthesis of metallic carbonate hydroxide/oxides. In particular, the Bi-MOFs function as a sacrificial precursor in the synthesis of hollow NiMn(CO)·0·.11HO/ZnO@CoO CNCs (NM-CH/ZnO@CoO CNCs) cubic composite materials by a straightforward low-temperature treatment. The NM-CH/ZnO@CoO CNCs exhibited exceptional electrochemical performance with high specific capacity of 196.3 ± 0.08 mAh/g, specific capacitance of 1179 ± 0.10 F g at 0.5 A g, and outstanding cycling stability of 98% after 25,000 cycles compared to the other electrode materials. The porous and hollow structure, along with a large surface area, contributed to the enhanced electrochemical properties of the composite material. An HSC was constructed using NM-CH/ZnO@CoO CNCs as the cathode and activated porous carbon (APC) as the anode, resulting in a device with a specific energy of 33 ± 0.12 Wh kg and a power density of 19354 ± 0.07 W kg. The use of Bi-MOF electrodes presents new avenues for the development of high-performance energy storage materials, with the potential for industrial energy storage application demonstrated though the successful powering of portable lightbulbs.
由于其几何特性，电极和电活性材料是超级电容器开发中的关键组件。在本研究中，通过设计一种新型的金属碳酸氢氧化合物/氧化物合成方法，双金属有机框架（Bi-MOFs，ZIF-8@ZIF-67）被用作高性能混合超级电容器（HSC）的电极材料。特别是，Bi-MOFs在通过简单的低温处理合成中空NiMn(CO)·0·11HO/ZnO@CoO CNCs（NM-CH/ZnO@CoO CNCs）立方复合材料的过程中充当牺牲前驱体。与其他电极材料相比，NM-CH/ZnO@CoO CNCs表现出卓越的电化学性能，在0.5 A g时具有196.3 ± 0.08 mAh/g的高比容量、1179 ± 0.10 F g的比电容，以及在25000次循环后98%的出色循环稳定性。多孔和中空结构以及大表面积有助于增强复合材料的电化学性能。使用NM-CH/ZnO@CoO CNCs作为阴极和活性多孔碳（APC）作为阳极构建了一个HSC，得到的器件比能量为33 ± 0.12 Wh kg，功率密度为19354 ± 0.07 W kg。Bi-MOF电极的使用为高性能储能材料的开发提供了新途径，通过成功为便携式灯泡供电展示了其在工业储能应用中的潜力。
