Attempts to Improve the Energy Capacity of Capacitive Electrochemical Energy Storage Devices

Authors

Lin-po YU, Department of Chemical and Environmental Engineering, and Centre for Sustainable Energy Technologies, Faculty of Science and Engineering, University of Nottingham Ningbo China, Ningbo 315100, Zhejiang, China;
Z. CHEN George, Department of Chemical and Environmental Engineering, and Centre for Sustainable Energy Technologies, Faculty of Science and Engineering, University of Nottingham Ningbo China, Ningbo 315100, Zhejiang, China;Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK;Follow

Corresponding Author

Z. CHEN George(george.chen@nottingham.edu.cn)

Abstract

This article reviews selected literatures from the authors’ research group on the development of capacitive electrochemical energy storage (EES) devices, focusing on supercapacitors and supercapatteries at both the electrode material level and device level. Electronically conducting polymers (ECPs) and transition metal oxides (TMOs) composited with carbon nanotubes (CNTs) were found to be able to improve the capacitance performance as capacitive faradaic storage electrode. Carbon materials, like activated carbon (Act-C) and carbon black, were used to fabricate non-faradaic capacitive storage electrode. It was found that the electrode capacitance balance can effectively extend the maximum charging voltage (MCV) of the supercapacitor, and hence, to enhance the energy capacity of this capacitive EES device. The MCV of this kind of device can also be multiplied by bipolarly stacking the supercapacitors to meet the high voltage demand from the power device. Supercapatteries that take advantages of both capacitive and faradaic charge storage mechanisms have been proposed and demonstrated to achieve the high power capability of supercapacitors and the large storage capacity of batteries.

Graphical Abstract

DOI Link

https://doi.org/10.13208/j.electrochem.170347

Publication Date

2017-10-28

Online Available Date

2017-07-07

Revised Date

2017-07-07

Received Date

2017-04-20

Recommended Citation

Lin-po YU, Z. CHEN George. Attempts to Improve the Energy Capacity of Capacitive Electrochemical Energy Storage Devices[J]. Journal of Electrochemistry, 2017 , 23(5): 533-547.
DOI: 10.13208/j.electrochem.170347
Available at: https://jelectrochem.xmu.edu.cn/journal/vol23/iss5/4