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In-situ growth of Cu(OH)2@FeOOH nanotubes arrays on catalytically deposited Cu current collector patterns for high-performance flexible in-plane micro-size energy storage devices

Abstract

Despite integrated energy storage devices, such as in-plane micro-supercapacitors (MSCs), are attractive for powering portable microelectronics, it is still challenging to develop patterning technologies with high practicability and to rationally design and fabricate electrochemical active materials with feasible procedure. Here, we propose a facile solution-immersion method to fabricate interdigitated copper electrodes with an in-situ converted Cu(OH)2@FeOOH nanotubes (NTs) array. The copper current collector can be patterned together with the pervasively applied copper circuits by a facile copper-patterning approach based on cost effective electroless catalytical deposition of copper with patterned Ag catalysts, which is greatly conducive to the integration of in-plane energy storage devices into microelectronic systems. Furthermore, the rationally designed Cu(OH)2@FeOOH NTs array, which is in-situ converted from the patterned copper electrodes, is demonstrated to be an excellent electrochemically active material with advantages including porous structure with large specific surface area, excellent wettability against the electrolyte, short ion diffusion length and one-dimensional electron transport pathway. The resulted MSC devices fabricated with the interdigitated Cu(OH)2@FeOOH/Cu electrodes exhibit high specific capacitance (58.0 mF cm-2 at 0.1 mA cm-2), high energy density (18.07 μWh cm-2), excellent cycling stability and desirable flexibility.

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Publication details

The article was received on 07 Jul 2018, accepted on 02 Aug 2018 and first published on 02 Aug 2018


Article type: Paper
DOI: 10.1039/C8EE01979G
Citation: Energy Environ. Sci., 2018, Accepted Manuscript
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    In-situ growth of Cu(OH)2@FeOOH nanotubes arrays on catalytically deposited Cu current collector patterns for high-performance flexible in-plane micro-size energy storage devices

    J. Xie, Y. Ji, J. Kang, J. Sheng, D. Mao, X. Fu, R. Sun and C. Wong, Energy Environ. Sci., 2018, Accepted Manuscript , DOI: 10.1039/C8EE01979G

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