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High-Performance Pseudocapacitive Microsupercapacitors with Three-Dimensional Current Collector of Vertical ITO Nanowire Arrays

Abstract

To meet the explosive development of miniaturized electronic devices, miniaturized power sources are highly demanded. Due to high power density, long life time and safety in use, microsupercapacitors (MSCs) become promising candidates of miniaturized energy storage devices. However, most of reported MSCs possess a thin-film or papery stacked structures which exhibit a low areal or volumetric energy density. In order to improve the performance of MSCs to meet the demands of wider practical applications, the mass loading of active materials must be increased properly. Here, we report an In2O3:Sn (ITO) NWs three-dimensional (3D) network which serves as current collector and 3D scaffold of MSCs. After loading active material (MnO2) and applying a facile and scalable laser assisted fabrication strategy, the ITO NWs@MnO2 based in-plane interdigital MSC could exhibit high areal capacitance of 193.8 mF cm-2. Moreover, it reveals a superior areal energy density of 26.94 µWh cm-2 with a peak areal power energy density of 15.07 mW cm-2 due to highly conductive 3D network design and intimate contact between network and active material. As far as we know, it is the first time to introduce ITO NWs into MSCs. Therefore, this work offers a versatile ITO NWs 3D network into pseudocapacitive MSCs which are promising miniaturized energy storage devices with high performance.

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Publication details

The article was received on 10 Jan 2019, accepted on 11 Feb 2019 and first published on 11 Feb 2019


Article type: Paper
DOI: 10.1039/C9TA00364A
Citation: J. Mater. Chem. A, 2019, Accepted Manuscript

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    High-Performance Pseudocapacitive Microsupercapacitors with Three-Dimensional Current Collector of Vertical ITO Nanowire Arrays

    J. Du, Y. Zhao, Z. Zhang, X. Mu, X. Jiang, B. Huang, Y. Zhang, S. Zhang, Z. Zhang and E. Xie, J. Mater. Chem. A, 2019, Accepted Manuscript , DOI: 10.1039/C9TA00364A

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