Flexible planar supercapacitors by straightforward filtration and laser processing steps
|Author:||Pitkänen, Olli1; Eraslan, Toprak2; Sebök, Dániel3;|
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
|Online Access:||PDF Full Text (PDF, 1.8 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2020110989667
|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.
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
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.
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