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Interweaving Metal-organic Frameworks Templated Co-Ni Layered Double Hydroxide Nanocages with Nanocellulose and Carbon Nanotubes to Make Flexible and Foldable Electrodes for Energy Storage Device

Abstract

Metal-organic frameworks (MOFs) and nanocellulose represent emerging and traditional porous materials, respectively. The combination of these two materials in specific ways could generate novel nanomaterials with integrated advantages and versatile functionalities. This study outlines the development of hierarchical porous and conductive nanosheets based on zeolitic imidazolate framework-67 (ZIF-67, a Co-based MOF) templated Co-Ni layered double hydroxide (LDH) nanocages, Cladophora cellulose (CC) nanofibers, and multi-walled carbon nanotubes (CNTs). The LDH-CC-CNT nanosheets can be used as flexible and foldable electrodes for energy storage device (ESD). The electrodes are associated with high areal capacitance of up to 1979 mF cm−2 at a potential scan rate of 1 mV s−1. A flexible, foldable, and hybrid ESD is assembled from LDH-CC-CNT and CC-CNT electrodes with PVA/KOH gel. The entire device has an areal capacitance of 168 mF cm−2 and an energy density of 0.6 mWh cm−3 (60 μWh cm−2), at a power density of 8.0 mW cm−3 (0.8 mW cm−2). These promising results demonstrate the potential of using MOFs and sustainable cellulose in flexible, foldable electronic energy storage devices.

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Publication details

The article was received on 21 Oct 2018, accepted on 09 Nov 2018 and first published on 09 Nov 2018


Article type: Communication
DOI: 10.1039/C8TA10133G
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
  • Open access: Creative Commons BY license
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    Interweaving Metal-organic Frameworks Templated Co-Ni Layered Double Hydroxide Nanocages with Nanocellulose and Carbon Nanotubes to Make Flexible and Foldable Electrodes for Energy Storage Device

    C. Xu, X. Kong, S. Zhou, B. Zheng, F. Huo and M. Strømme, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA10133G

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