Original Article

Subject Category: Energy conversion, catalysis and separation

Citation: NPG Asia Materials (2014) 6, e119; doi:10.1038/am.2014.59
Published online 15 August 2014

Fabrication of large-area and high-crystallinity photoreduced graphene oxide films via reconstructed two-dimensional multilayer structures
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Yuanlong Shao1, Hongzhi Wang1, Qinghong Zhang1 and Yaogang Li2

  1. 1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai, China
  2. 2Engineering Research Center of Advanced Glasses Manufacturing Technology, Ministry of Education, Donghua University, Shanghai, China

Correspondence: Professor H Wang, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, no. 2999 North Renmin Road, Shanghai, Songjiang 201620, China. E-mail: wanghz@dhu.edu.cn; Professor Y Li, Engineering Research Center of Advanced Glasses Manufacturing Technology, Ministry of Education, Donghua University, Shanghai 201620, China. E-mail: yaogang_li@dhu.edu.cn

Received 14 November 2013; Revised 9 May 2014; Accepted 1 June 2014

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Abstract

Graphene, the last representative sp2 carbon material to be isolated, acts as an ideal material platform for constructing flexible electronic devices. Exploring a new method to fabricate high-quality graphene films with high throughput is essential for achieving greater performance with flexible electronic devices. Here, we report a facile coating and subsequent illumination method for mass-fabricating highly crystalline photoreduced graphene oxide (PRGO) films directly onto conductive substrates. The direct fabrication of PRGO films onto Cu foils with partial oxygenated groups, an intensive stacked highly crystalline structure, and reduced graphene oxide regions enable significant performance enhancements when used as supercapacitor electrodes compared with other graphene-only devices, exhibiting high specific capacitances of 275Fg−1 at a scan rate of 10mVs−1 and 167Fg−1 at 1Vg−1 with excellent rate capability. The as-established all-solid-state flexible supercapacitors exhibit superior flexibility and robust mechanical stability, resulting in a capacitance delay of only 2% after performing 100 bending cycles. The demonstrated PRGO films provide a promising material platform to realize a broad range of applications related to flexible electronics devices.

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