Development of flexible energy-storage paper devices

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H05627
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Wood science
• Research Institution: Osaka University
• Principal Investigator: Koga Hirotaka 大阪大学, 産業科学研究所, 特任助教(常勤) (30634539)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: ペーパーエレクトロニクス / 蓄電紙 / 機能紙 / 酸化グラフェン / 抄紙技術 / 光還元

Outline of Final Research Achievements

Recent progress in portable and wearable electronics has promoted a growing demand for affordable and flexible energy-storage devices. Although reduced graphene oxide (rGO) serves as high performance electrode, rGO-based flexible electrodes remain challenging with respect to scalability and eco-friendliness concerning both the compositing process of rGO with a flexible matrix and the reduction process of GO.
In this study, we demonstrated that papermaking and successive in situ flash-reduction can be prospective to achieve this goal. Single-layer GO sheets were composited with wood-derived cellulose paper (even with waste paper) by a papermaking process with a filtration time of 4 s, followed by a room-temperature and chemical-free flash reduction process for 0.036 s. The rGO/paper electrodes showed high specific capacitance, up to 212 F/g, for a paper-based supercapacitor. This finding opens new doors for affordable and flexible energy-storage papers in future wearable electronics.

Free Research Field

複合材料科学