University of Oulu

Olli Pitkänen et al 2020 Nanotechnology 31 495403

Flexible planar supercapacitors by straightforward filtration and laser processing steps

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Author: Pitkänen, Olli1; Eraslan, Toprak2; Sebök, Dániel3;
Organizations: 1Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, Oulu, Finland
2Department of Material Science and NanoEngineering, Rice University, Houston, Texas 77005, United States of America
3Department of Applied and Environmental Chemistry, Interdisciplinary Excellence Centre, University of Szeged, Rerrich Béla tér 1, Szeged H-6720, Hungary
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.8 MB)
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Language: English
Published: IOP Publishing, 2020
Publish Date: 2020-11-09


There is ever increasing demand for flexible energy storage devices due to the development of wearable electronics and other small electronic devices. The electrode flexibility is best provided by a special set of nanomaterials, but the required methodology typically consists of multiple steps and are designed just for the specific materials. Here, a facile and scalable method of making flexible and mechanically robust planar supercapacitors with interdigital electrode structure made of commercial carbon nanomaterials and silver nanowires is presented. The capacitor structure is achieved with vacuum filtration through a micropatterned contact mask and finished with simple laser processing steps. A maximum specific capacitance of 4 F cm−3 was measured with cyclic voltammetry at scan rate of 5 mV s−1. The reliability and charge transfer properties of devices were further investigated with galvanostatic charge-discharge measurements and electrochemical impedance spectroscopy, respectively. Furthermore, mechanical bending tests confirmed the devices have excellent mechanical integrity, and the deformations have no adverse effects on the electrochemical charge-discharge behavior and stability.

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Series: Nanotechnology
ISSN: 0957-4484
ISSN-E: 1361-6528
ISSN-L: 0957-4484
Volume: 31
Issue: 49
Article number: 495403
DOI: 10.1088/1361-6528/abb336
Type of Publication: A1 Journal article – refereed
Field of Science: 221 Nanotechnology
Funding: The financial support received partly from EU Interreg Nord—Lapin liitto (project Transparent, conducting and flexible films for electrodes), University of Oulu (projects Entity and PoC: Ultra-low permittivity and loss porous nanocomposites for future 6G telecommunication), Academy of Finland (project: Nigella), Hungarian National Research, Development and Innovation Office through the projects GINOP-2.3.2-15-2016-00013 and GINOP-2.3.3-15-2016-00010, and the Ministry of Human Capacities, Hungary, Grant No. 20391- 3/2018/FEKUSTRAT is acknowledged. O.P and D.S. are thankful for the Ulla Tuominen foundation and J´anos Bolyai Research Scholarship of the Hungarian Academy of Sciences, respectively. We acknowledge the technical help received from the Micro- and Nanotechnology Center, University of Oulu.
Copyright information: © 2020 The Author(s). Published by IOP Publishing Ltd Printed in the UK. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.