Issue 4, 2016

Fast, scalable, and eco-friendly fabrication of an energy storage paper electrode

Abstract

Recent progress in portable and wearable electronics has promoted a growing demand for high-performance and flexible energy-storage devices that are abundant and affordable. Because reduced graphene oxide (rGO), originating from inexpensive graphite, serves as a higher-performance energy-storage electrode than conventional activated carbons and carbon nanotubes, research and development of rGO/polymer composite electrodes for flexible supercapacitors have become a center of attraction. However, the fabrication of rGO-based flexible electrodes frequently requires a long time with high-temperature treatment or toxic chemical treatment, resulting in the lack of scalability and eco-friendliness. Here we show a fast, scalable, and environment-compatible route to fabricate a high-performance rGO/cellulose paper supercapacitor electrode. Single-layer graphene oxide (GO) sheets and recycled waste pulp fibers were successfully fabricated into a paper composite by a well-established scalable papermaking process, followed by a room-temperature, additive-free, and millisecond-timescale flash reduction process. The as-prepared rGO/paper electrode had a high specific capacitance, up to 212 F g−1, for an all paper-based flexible supercapacitor, comparable to those of state-of-the-art rGO-based electrodes, while dramatically decreasing the reduction time of GO from the conventional hour timescale to milliseconds. This work will pave the way for green, flexible, and mass-producible energy-storage paper in future wearable electronics.

Graphical abstract: Fast, scalable, and eco-friendly fabrication of an energy storage paper electrode

Supplementary files

Article information

Article type
Paper
Submitted
19 Aug 2015
Accepted
21 Sep 2015
First published
24 Sep 2015

Green Chem., 2016,18, 1117-1124

Author version available

Fast, scalable, and eco-friendly fabrication of an energy storage paper electrode

H. Koga, H. Tonomura, M. Nogi, K. Suganuma and Y. Nishina, Green Chem., 2016, 18, 1117 DOI: 10.1039/C5GC01949D

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