Hybrid nanonet/nanoflake NiCo2O4 electrodes with an ultrahigh surface area for supercapacitors

作者：Lu, Yang; Yan, Hailong; Zhang, Deyang; Lin, Jing; Xue, Yanming; Li, Jie; Luo, Yongsong; Tang, Chengchun^*

来源：Journal of Solid State Electrochemistry, 2014, 18(11): 3143-3152.

DOI：10.1007/s10008-014-2546-4

• NiCo2O4
• Hybrid structure
• Hydrothermal method
• Supercapacitors

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.

• 出版日期2014-11
• 单位河北工业大学; 信阳师范学院