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Tuning the properties of flash-reduced graphene oxide electrodes for supercapacitor applications
Author(s): Shao Ing Wong; Han Lin; Jaka Sunarso; Basil T. Wong; Baohua Jia
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Paper Abstract

Graphene-based porous materials have attracted broad attentions in supercapacitor (SC) applications, due to the high conductivity and large surface area. The most widely used approach to fabricate graphene-based porous electrode materials is the reduction of graphene oxide (GO). The reduction process significantly affects the properties of reduced graphene oxide (RGO), including the conductivity, surface chemistry and the porosity. Therefore, the control the reduction process is of great importance to produce high performance electrode materials. In this paper, we explore the control of the electrical conductivity and surface chemistry of flash reduced GO material, which depends on the reduction degree. The reduction degree is tuned by varying the energy of a camera flash used to reduce the GO. The reduction degree is characterized by X-ray photoelectron spectroscopy (XPS). We find the high reduction degree (low oxygen content) is beneficial to achieve high electrical conductivity, however, the overall specific capacitance becomes lower. As a result, we can see that electrode surface chemistry is more dominant than its electrical conductivity in enhancing SC specific capacitance.

Paper Details

Date Published: 31 December 2019
PDF: 3 pages
Proc. SPIE 11201, SPIE Micro + Nano Materials, Devices, and Applications 2019, 112010L (31 December 2019); doi: 10.1117/12.2543097
Show Author Affiliations
Shao Ing Wong, Swinburne Univ. of Technology (Australia)
Han Lin, Swinburne Univ. of Technology (Australia)
Jaka Sunarso, Swinburne Univ. of Technology Sarawak Campus (Malaysia)
Basil T. Wong, Swinburne Univ. of Technology Sarawak Campus (Malaysia)
Baohua Jia, Swinburne Univ. of Technology (Australia)


Published in SPIE Proceedings Vol. 11201:
SPIE Micro + Nano Materials, Devices, and Applications 2019
M. Cather Simpson; Saulius Juodkazis, Editor(s)

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