超级电容器
材料科学
兴奋剂
纳米技术
氧气
碳纤维
化学工程
光电子学
化学
电极
复合数
复合材料
电化学
工程类
有机化学
物理化学
作者
Khan Abdul Sammed,Anuj Kumar,Amjad Farid,Wenbin Zhang,Abdul Rehman Akbar,Mumtaz Ali,Saira Ajmal,Ghulam Yasin,Naeem Ullah,Lujun Pan,Wei Zhao
标识
DOI:10.1016/j.cej.2024.150388
摘要
Electronic structural engineering via integration of oxygen deficiencies and a variety of dopants in metal oxide electrodes has fascinated the research interest for developing next-generation supercapacitors. Herein, by incorporating Ni dopants and creating O vacancies, it has thoroughly been explored the potential of vanadium oxide (V2O5) nanosheets anchored on the carbon nanocoils (CNCs) grown on nickel foam (NF) for supercapacitor electrodes (OV-Ni-V2O5/CNCs/NF). We validate a synergistic effect provided by heterostructure designed with multifunctional nano geometries. It is found that O vacancies and Ni dopants alter the electronic states of V2O5 with enhanced electrical conductivity and enriched redox active sites. We optimized O vacancies and achieved a specific capacity of 3485F g−1 (1742.5C g−1) at 1 A/g, representing ∼ 3.8 × higher compared to the best prior report. Furthermore, an asymmetric supercapacitor device was assembled with binder-free electrodes, using O0.075-V2O5/CNCs/NF as a cathode and sulfur-doped CNCs as an anode, which delivered a high energy density of 144 W h kg−1 and long-term stability of 5000 cycles, which is superior to most of the previous studies. This study paves a rational strategy to design high-performance electrodes for next-generation supercapacitors and other energy storage technologies.
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