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Hybrid nanonet/nanoflake NiCo2O4 electrodes with an ultrahigh surface area for supercapacitors |
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| Authors: | Yang Lu Hailong Yan Deyang Zhang Jing Lin Yanming Xue Jie Li Yongsong Luo Chengchun Tang |
| Institution: | 1. School of Material Science and Engineering, Hebei University of Technology, Tianjin, 300130, People’s Republic of China 2. Henan Key Laboratory of Advanced Micro/Nano Functional Materials, School of Physics and Electronic Engineering, Xinyang Normal University, Xinyang, 46000, People’s Republic of China |
| Abstract: | An integrated electrode consisting of hybrid nanonet/nanoflake NiCo2O4 grown on stainless steel mesh substrates exhibits a high specific capacitance while maintaining high-rate capability and good cycling stability. The specific capacitance reaches a maximum of 911 F g?1 at a current density of 10 A g?1, which can still retain 864 F g?1 (94.8 % retention) after 10,000 cycles. These much-improved electrochemical performances are attributed to the unique architecture of NiCo2O4 electrode. The interconnected nanonet NiCo2O4 with an ultrahigh surface area significantly facilitates the rapid ion/electron transport and guarantees good mechanical adhesion, while the ultrathin nanoflakes further extend the active sites for fast redox reactions for efficient energy storage. Figure Hybrid nanonet/nanoflake NiCo2O4 grown on stainless steel mesh exhibits superior capacitive performance and long-life stability as an integrated electrode for high-performance supercapacitors. |
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