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- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
- Publication history
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Received May 1, 2023
Accepted October 20, 2023
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Paper-Based Solid-State Micro-supercapacitors Fabricated by Hydrophobic Wax Barrier Printing
Abstract
Flexible and small-scale energy storage technologies are critical for future applications such as wearable electronics. In
this context, paper has emerged as a lightweight, low-cost, and ecologically friendly fl exible substrate for energy storage
devices. This paper presents a simple method for fabricating a micro-supercapacitor (MSC) using a wax printing approach
that can achieve high resolution without requiring complex processes. In addition, the developed MnO 2 –Au-paper (MAP)
microelectrodes with high porosity exhibit enhanced charge and ion transfer while maintaining a stable fl exibility. The solidstate
micro-supercapacitor delivers a very large areal capacitance of 624.32 mF cm −2 at 0.2 mA cm −2 and is stable under
external stress. The highest energy and power densities obtained for the present MSCs (55.5 μWh cm −2 and 1.59 mW cm −2 ,
respectively), are much larger than those previously reported for pseudocapacitive MSCs, including fl exible ones.
