High-Voltage Flexible Microsupercapacitors Based on Laser-Induced Graphene

High-voltage energy-storage devices are quite commonly needed for robots and dielectric elastomers. This paper presents a flexible high-voltage microsupercapacitor (MSC) with a planar in-series architecture for the first time based on laser-induced graphene. The high-voltage devices are capable of s...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2018-08, Vol.10 (31), p.26357-26364
Main Authors: Li, Xiaoqian, Cai, Weihua, Teh, Kwok Siong, Qi, Mingjing, Zang, Xining, Ding, Xinrui, Cui, Yong, Xie, Yingxi, Wu, Yichuan, Ma, Hongyu, Zhou, Zaifa, Huang, Qing-An, Ye, Jianshan, Lin, Liwei
Format: Article
Language:English
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Summary:High-voltage energy-storage devices are quite commonly needed for robots and dielectric elastomers. This paper presents a flexible high-voltage microsupercapacitor (MSC) with a planar in-series architecture for the first time based on laser-induced graphene. The high-voltage devices are capable of supplying output voltages ranging from a few to thousands of volts. The measured capacitances for the 1, 3, and 6 V MSCs were 60.5, 20.7, and 10.0 μF, respectively, under an applied current of 1.0 μA. After the 5000-cycle charge–discharge test, the 6 V MSC retained about 97.8% of the initial capacitance. It also was recorded that the all-solid-state 209 V MSC could achieve a high capacitance of 0.43 μF at a low applied current of 0.2 μA and a capacitance of 0.18 μF even at a high applied current of 5.0 μA. We further demonstrate the robust function of our flexible high-voltage MSCs by using them to power a piezoresistive microsensor (6 V) and a walking robot (>2000 V). Considering the simple, direct, and cost-effective fabrication method of our laser-fabricated flexible high-voltage MSCs, this work paves the way and lays the foundation for high-voltage energy-storage devices.
ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.8b10301