Synthesis and Electrochemical Properties of CNTs/V₂O₅ Hollow Microspheres

Authors

Liang HAO, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
Lai-fa SHEN, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
Jie WANG, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
Jia-jia ZHU, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
Xiao-chen ZHAO, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
Xiao-gang ZHANG, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;Follow

Corresponding Author

Xiao-gang ZHANG(azhangxg@163.com)

Abstract

The carbon nanotubes/vanadium oxides (CNTs/V₂O₅) hollow microspheres (VOC) were prepared via solvothermal process. The effects of the ratio for CNTs to V₂O₅ on the morphologies, structures and electrochemical performances were systemically investigated. The results indicate that CNTs dramatically enhanced the rate performances of VOC composite electrodes. When the ratio of CNTs is 7.1%, the VOC composite electrode exhibited the best electrochemical performance, which delivered a specific capacitance of 346 F·g^-1 at 0.5 A·g^-1 and maintained 75% at 8 A·g^-1 in 5 mol L^-1 LiNO₃. A hybrid capacitor was assembly using commercial activated carbon as the negative electrode and VOC as the positive electrode. The hybrid capacitor exhibited an energy density of 12.6 Wh·kg^-1 and power density of 700 W·kg^-1.

Graphical Abstract

Keywords

solvothermal process, V2O5, CNTs, hybrid capacitor

DOI Link

https://doi.org/10.13208/j.electrochem.141044

Publication Date

2015-04-28

Online Available Date

2015-01-05

Revised Date

2014-12-22

Received Date

2014-10-31

Recommended Citation

Liang HAO, Lai-fa SHEN, Jie WANG, Jia-jia ZHU, Xiao-chen ZHAO, Xiao-gang ZHANG. Synthesis and Electrochemical Properties of CNTs/V₂O₅ Hollow Microspheres[J]. Journal of Electrochemistry, 2015 , 21(2): 152-156.
DOI: 10.13208/j.electrochem.141044
Available at: https://jelectrochem.xmu.edu.cn/journal/vol21/iss2/7