微晶
超级电容器
微观结构
纳米材料
比表面积
材料科学
电化学
功率密度
电解质
化学工程
纳米技术
热液循环
复合材料
电容
化学
冶金
电极
功率(物理)
物理化学
催化作用
工程类
物理
量子力学
生物化学
作者
M.A. Yewale,R.A. Kadam,N.K. Kaushik,Janardhan Reddy Koduru,Ninad B. Velhal,Umesh T. Nakate,Ashok Jadhavar,N.D. Sali,Dong-Chul Shin
标识
DOI:10.1016/j.mseb.2022.116072
摘要
The precise synthesis of interconnected and porous microstructured electrode materials for supercapacitor application is always challenging to obtain maximum surface area for electrode–electrolyte interaction. Herein, the interconnected microstructured morphology of NiCo2O4 is synthesized via an inexpensive chemical route viz hydrothermal method. Synthesized NiCo2O4 nanomaterial is characterized for structural, morphological, electrochemical characteristics by XRD, SEM, CV, GCD, and EIS measurements. The XRD pattern reveals that nanostructured material is polycrystalline with a cubic phase. The average crystallite size of NiCo2O4 is 10.85 nm. The SEM analysis confirms interconnected plates microstructures with surface aea of 34 m2g−1. The NiCo2O4 electrodes are fabricated and their specific capacitance was measured using CV and GCD data. The maximum specific capacitance of the NiCo2O4 electrode is 550 F/g. Furthermore, an as-fabricated asymmetric supercapacitor (ASC) has an energy density of 3.81 Wh/kg, a power density of 789 W/kg at 4 mAcm−2, and capacitance retention of 87% after 2,000 cycle. An interconnected plate-like microstructure of NiCo2O4 material is a potential candidate for energy storage application.
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