Jump to main content
Jump to site search

Issue 7, 2017
Previous Article Next Article

Facile synthesis of water soluble reduced graphene oxide with a high concentration and its application in printable micro-supercapacitors

Author affiliations

Abstract

Direct printing techniques have generated significant research interest in fabricating flexible and scalable micro-supercapacitors (MSCs). In this study, we report a facile and cost-effective way to synthesize water soluble reduced graphene oxide (WSG) with a high concentration by decoration with aminobenzenesulfonic acid (ABS) and reduction with ascorbic acid. The WSG possesses excellent electrical conductivity (360 S m−1), good water dispersion stability as well as a high zeta potential value (−62 mV at pH 11), and the concentration of the as-prepared WSG could reach 5 mg mL−1, nearly as great as the highest value from previous reports. Then, using this high-concentration WSG dispersion directly as an electrochemically active ink material, micro-supercapacitor electrodes could be facilely fabricated via a direct printing technique on common printing paper, and the all-solid-state flexible MSCs could be further assembled. The results show that these flexible MSCs exhibit high area and volume specific capacitances of 2.67 mF cm−2 and 6.75 F cm−3, maintaining 94.8% of their initial specific capacitance after 5000 cycles at a scan rate of 50 mV s−1. More importantly, the capacitance and potential can be expanded by connecting a WSG-MSC device in parallel and in series, and the assembled devices are further demonstrated to be capable of lighting a liquid crystal display with three WSG-MSCs in series. These findings not only provide a simple way to synthesize WSG with a high concentration, but also facilitate its applications in printable and flexible MSCs with high performance.

Graphical abstract: Facile synthesis of water soluble reduced graphene oxide with a high concentration and its application in printable micro-supercapacitors

Back to tab navigation

Supplementary files

Publication details

The article was received on 24 Apr 2017, accepted on 15 Jul 2017 and first published on 18 Jul 2017


Article type: Paper
DOI: 10.1039/C7SE00214A
Citation: Sustainable Energy Fuels, 2017,1, 1601-1610
  •   Request permissions

    Facile synthesis of water soluble reduced graphene oxide with a high concentration and its application in printable micro-supercapacitors

    H. Su, P. Zhu, L. Zhang, F. Zhou, X. liang, T. Li, Q. Wang, R. Sun and C. Wong, Sustainable Energy Fuels, 2017, 1, 1601
    DOI: 10.1039/C7SE00214A

Search articles by author

Spotlight

Advertisements