超级电容器
沸石咪唑盐骨架
制作
储能
咪唑酯
比表面积
纳米技术
材料科学
纳米材料
金属有机骨架
化学工程
电容
纳米颗粒
电导率
背景(考古学)
工程类
化学
吸附
电化学
电极
物理
古生物学
物理化学
催化作用
功率(物理)
病理
有机化学
生物
医学
替代医学
量子力学
生物化学
作者
Md Rezaul Karim,Chang‐Hyung Choi,Akbar Mohammad,Taeho Yoon
标识
DOI:10.1016/j.est.2024.112199
摘要
Electrical conductivity and surface area of nanomaterials are two critical factors that affect their efficacy as energy storage devices. Metal-organic frameworks (MOFs) have gained significant interest in the field of high-performance supercapacitors due to their expansive specific surface area and adjustable pore structure. Enhancing the conductivity of MOFs can be achieved by incorporating conductive materials with it. Here, surface-engineered Ag-deposited Zeolitic imidazolate framework-8 (ZIF-8) was developed (1-Ag@ZIF-8 and 2-Ag@ZIF-8) utilizing an electroactive biofilm for energy-storage applications. In this context, ZIF-8 was synthesized independently and then subjected to treatment with silver nanoparticles (Ag NPs) by applying the environmentally friendly approach. The Ag nanoparticles loaded onto ZIF-8 was tested for their performance based on the amount of Ag and assess its electrochemical performance. Spherical Ag NPs were successfully deposited on ZIF-8 and having the diameter in the rage of 6–12 nm with some large similar morphological characteristics. Further, an exceptionally high specific capacitance of 538.8 F g−1 was observed at a current density of 1 A g−1, which was approximately two- and three-fold higher than those of 1-Ag@ZIF-8 and ZIF-8, respectively. A long cycle stability (83.3 % capacity retention at 10 A g−1) was obtained over 5000 cycles. This study provides interesting insights into the improvement of the overall performance of active materials by tuning their surface characteristics and conductivity via an electroactive biofilm approach.
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