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Interweaving Metal-organic Frameworks Templated Co-Ni Layered Double Hydroxide Nanocages with Nanocellulose and Carbon Nanotubes as Flexible Electrodes for Solid-State Supercapacitors
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.ORCID iD: 0000-0002-5342-3686
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.ORCID iD: 0000-0003-1032-6314
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Nanotechnology and Functional Materials.ORCID iD: 0000-0002-5496-9664
2018 (English)In: Interweaving Metal-organic Frameworks Templated Co-Ni Layered Double Hydroxide Nanocages with Nanocellulose and Carbon Nanotubes as Flexible Electrodes for Solid-State Supercapacitors, 2018Conference paper, Poster (with or without abstract) (Refereed)
Abstract [en]

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 strategy relies on evenly interweaving the hollow Co-Ni LDH nanocages with CC nanofibers and CNTs. Benefiting from the flexibility of nanocellulose, the electrochemical activity of the LDH structure, and the high conductivity of CNTs, the LDH-CC-CNT nanosheets can be used as flexible and foldable electrodes for supercapacitors. 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 all-solid-state asymmetric supercapacitor (ASC) 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.

Place, publisher, year, edition, pages
2018.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-366548OAI: oai:DiVA.org:uu-366548DiVA, id: diva2:1264839
Conference
4th International Conference on Energy and Biological Materials
Available from: 2018-11-21 Created: 2018-11-21 Last updated: 2019-12-11

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Xu, ChaoKong, XueyingZhou, ShengyangStrömme, Maria

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