在海藻酸锌上原位生长ZIF-8作为超级电容器高性能电极材料

IF 5.4 2区 化学 Q2 CHEMISTRY, PHYSICAL
Zhongyan Hu, Zixin Wu, Siyu Gao, Jingkun Zhao, Shangru Zhai, Qingda An, Zuoyi Xiao
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引用次数: 0

摘要

在多孔碳中掺入金属有机骨架的方法对多孔碳的微观结构和整体性能有显著影响。本研究采用机械搅拌和原位生长两种方法制备了两种zif -8基多孔碳。第一种是三明治状多孔碳(ZA/ZFC),其中ZIF-8通过机械搅拌封装在海藻酸锌衍生的碳框架内。第二种类型是草莓状多孔碳(ZA@ZFC),其中ZIF-8通过原位生长方法分散在海藻酸锌衍生多孔碳的表面。对比研究表明,原位生长法制备的ZA@ZFC材料具有优异的电化学性能。在三电极配置下,ZA@ZFC在0.5 a g−1时的比电容为466.4 F g−1,是ZA/ZFC的2.14倍。当用作对称双电层电容器的电极时,其功率密度为250 W kg−1,能量密度为30.06 Wh kg−1。经过10,000次循环后,电容保持率仍为97.92 %,突出了其卓越的循环稳定性和长期耐用性。制备的ZA@ZFC样品具有独特的结构特征和优异的电化学性能,具有巨大的应用潜力。这项工作对先进的储能系统具有重要的研究价值,为未来研究优化mof -碳复合材料以实现更广泛的能源相关应用提供了一条有希望的途径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
In-situ growth of ZIF-8 onto zinc alginate for high-performance electrode material in supercapacitors
The method of incorporating metal-organic framework in porous carbons significantly influences their microstructure and overall performance. In this study, two types of ZIF-8-based porous carbons are prepared using mechanical stirring and in-situ growth methods. The first type is a sandwich-like porous carbon (ZA/ZFC), where ZIF-8 is encapsulated within carbon framework derived from zinc alginate through mechanical stirring. The second type is a strawberry-like porous carbon (ZA@ZFC), where ZIF-8 is dispersed on the surface of the zinc alginate-derived porous carbon through an in-situ growth method. Comparative studies reveal that the ZA@ZFC material prepared via the in-situ growth process exhibits superior electrochemical performance. Under a three-electrode configuration, ZA@ZFC achieves a specific capacitance of 466.4 F g−1 at 0.5 A g−1, which is 2.14 times higher than that of ZA/ZFC. When employed as an electrode in a symmetric electric double-layer capacitor, it demonstrates an energy density of 30.06 Wh kg−1 at a power density of 250 W kg−1. After undergoing 10,000 cycles, the capacitance retention is still 97.92 %, highlighting its exceptional cycling stability and long-term durability. The prepared ZA@ZFC sample showcases immense application potential due to its unique structural features and outstanding electrochemical performance. This work holds significant research value for advanced energy storage systems, offering a promising pathway for future studies to optimize MOF-carbon composites for wider energy-related applications.
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来源期刊
CiteScore
8.70
自引率
9.60%
发文量
2421
审稿时长
56 days
期刊介绍: Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.
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