A three-electrode integrated photo-supercapacitor utilizing graphene-based intermediate bifunctional electrode

Lau, Siawcheng; Lim, Hong Ngee; Ravoof, Thahira; Yaacob, Mohd; Grant, David; Mackenzie, Roderick; Harrison, Ian; Huang, Nay Ming

doi:10.1016/j.electacta.2017.04.003

Authors

Siawcheng Lau

Hong Ngee Lim

Thahira Ravoof

Mohd Yaacob

DAVID GRANT david.grant@nottingham.ac.uk
Professor of Materials Science

Roderick Mackenzie

Ian Harrison

Nay Ming Huang

Abstract

A dye-sensitized solar cell (DSSC) employing a compact and mesoporous titania (TiO2) film as the anode was integrated with a symmetrical supercapacitor utilizing polypyrrole/reduced graphene oxide (PPy/rGO) electrodes to form a photo-supercapacitor. The double-sided-electrodeposited PPy/rGO material served as an intermediate electrode which was bifunctional in nature; acting as a counter electrode for the DSSC to permit electrolyte regeneration, and also as an electrode for the supercapacitor. The isolated DSSC and supercapacitor were characterized before the integration, and the power conversion efficiency (PCE) of the DSSC was 2.4%, while the specific capacitance of the supercapacitor was 308.1 F/g. The performance of the integrated photo-supercapacitor was tested under a light illumination of 100 mW/cm2. By using a single PPy/rGO electrode at the cell/supercapacitor interface, an extended lifetime was achieved with up to 50 charge/discharge cycles. The photo-supercapacitor possessed a specific capacitance of 124.7 F g?1, and a retention percentage of 70.9% was obtained after 50 consecutive charge/discharge cycles.

Citation

Lau, S., Lim, H. N., Ravoof, T., Yaacob, M., Grant, D., Mackenzie, R., …Huang, N. M. (2017). A three-electrode integrated photo-supercapacitor utilizing graphene-based intermediate bifunctional electrode. Electrochimica Acta, 238, 178-184. https://doi.org/10.1016/j.electacta.2017.04.003

Journal Article Type	Article
Acceptance Date	Apr 1, 2017
Online Publication Date	Apr 2, 2017
Publication Date	Jun 1, 2017
Deposit Date	Sep 20, 2018
Publicly Available Date	Oct 29, 2018
Print ISSN	0013-4686
Publisher	Elsevier
Peer Reviewed	Peer Reviewed
Volume	238
Pages	178-184
DOI	https://doi.org/10.1016/j.electacta.2017.04.003
Public URL	https://www.scopus.com/inward/record.uri?eid=2-s2.0-85017530269&doi=10.1016%2fj.electacta.2017.04.003&partnerID=40&md5=935a175621e99f19f8e9e5c41ed4904c
Publisher URL	https://www.sciencedirect.com/science/article/pii/S0013468617307454