Carbon nanotubes and manganese oxide hybrid nanostructures as high performance fiber supercapacitors

Wei Gong; Bunshi Fugetsu; Zhipeng Wang; Ichiro Sakata; Lei Su; Xueji Zhang; Hironori Ogata; Mingda Li; Chao Wang; Ju Li; Josue Ortiz-Medina; Mauricio Terrones; Morinobu Endo

doi:10.1038/s42004-018-0017-z

Carbon nanotubes and manganese oxide hybrid nanostructures as high performance fiber supercapacitors

Wei Gong, Bunshi Fugetsu, Zhipeng Wang, Ichiro Sakata, Lei Su, Xueji Zhang, Hironori Ogata, Mingda Li, Chao Wang, Ju Li, Josue Ortiz-Medina, Mauricio Terrones, Morinobu Endo

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

Manganese oxide (MnO₂) has long been investigated as a pseudo-capacitive material for fabricating fiber-shaped supercapacitors but its poor electrical conductivity and its brittleness are clear drawbacks. Here we electrochemically insert nanostructured MnO₂ domains into continuously interconnected carbon nanotube (CNT) networks, thus imparting both electrical conductivity and mechanical durability to MnO₂. In particular, we synthesize a fiber-shaped coaxial electrode with a nickel fiber as the current collector (Ni/CNT/MnO₂); the thickness of the CNT/MnO₂ hybrid nanostructured shell is approximately 150 μm and the electrode displays specific capacitances of 231 mF cm⁻¹. When assembling symmetric devices featuring Ni/CNT/MnO₂ coaxial electrodes as cathode and anode together with a 1.0 M Na₂SO₄ aqueous solution as electrolyte, we find energy densities of 10.97 μWh cm⁻¹. These values indicate that our hybrid systems have clear potential as wearable energy storage and harvesting devices.

Original language	English (US)
Article number	16
Journal	Communications Chemistry
Volume	1
Issue number	1
DOIs	https://doi.org/10.1038/s42004-018-0017-z
State	Published - Dec 1 2018

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Chemistry
Environmental Chemistry
Biochemistry

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title = "Carbon nanotubes and manganese oxide hybrid nanostructures as high performance fiber supercapacitors",

abstract = "Manganese oxide (MnO2) has long been investigated as a pseudo-capacitive material for fabricating fiber-shaped supercapacitors but its poor electrical conductivity and its brittleness are clear drawbacks. Here we electrochemically insert nanostructured MnO2 domains into continuously interconnected carbon nanotube (CNT) networks, thus imparting both electrical conductivity and mechanical durability to MnO2. In particular, we synthesize a fiber-shaped coaxial electrode with a nickel fiber as the current collector (Ni/CNT/MnO2); the thickness of the CNT/MnO2 hybrid nanostructured shell is approximately 150 μm and the electrode displays specific capacitances of 231 mF cm−1. When assembling symmetric devices featuring Ni/CNT/MnO2 coaxial electrodes as cathode and anode together with a 1.0 M Na2SO4 aqueous solution as electrolyte, we find energy densities of 10.97 μWh cm−1. These values indicate that our hybrid systems have clear potential as wearable energy storage and harvesting devices.",

author = "Wei Gong and Bunshi Fugetsu and Zhipeng Wang and Ichiro Sakata and Lei Su and Xueji Zhang and Hironori Ogata and Mingda Li and Chao Wang and Ju Li and Josue Ortiz-Medina and Mauricio Terrones and Morinobu Endo",

note = "Funding Information: This research is supported in part by grants from the Project of Saitama Prefectural Industry-Accademia Collaborative Development Project Subsidy. J.L. acknowledges support by NSF ECCS-1610806. This research project started in 2015 as a collaborative research project with the laboratory of Mildred S. Dresselhaus (Institute Professor of Massachusetts Institute of Technology). Mildred S. Dresselhaus supervised this research project until she passed away in February 2017. Publisher Copyright: {\textcopyright} 2018, The Author(s).",

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AU - Gong, Wei

AU - Fugetsu, Bunshi

AU - Wang, Zhipeng

AU - Sakata, Ichiro

AU - Su, Lei

AU - Zhang, Xueji

AU - Ogata, Hironori

AU - Li, Mingda

AU - Wang, Chao

AU - Li, Ju

AU - Ortiz-Medina, Josue

AU - Terrones, Mauricio

AU - Endo, Morinobu

N1 - Funding Information: This research is supported in part by grants from the Project of Saitama Prefectural Industry-Accademia Collaborative Development Project Subsidy. J.L. acknowledges support by NSF ECCS-1610806. This research project started in 2015 as a collaborative research project with the laboratory of Mildred S. Dresselhaus (Institute Professor of Massachusetts Institute of Technology). Mildred S. Dresselhaus supervised this research project until she passed away in February 2017. Publisher Copyright: © 2018, The Author(s).

PY - 2018/12/1

Y1 - 2018/12/1

N2 - Manganese oxide (MnO2) has long been investigated as a pseudo-capacitive material for fabricating fiber-shaped supercapacitors but its poor electrical conductivity and its brittleness are clear drawbacks. Here we electrochemically insert nanostructured MnO2 domains into continuously interconnected carbon nanotube (CNT) networks, thus imparting both electrical conductivity and mechanical durability to MnO2. In particular, we synthesize a fiber-shaped coaxial electrode with a nickel fiber as the current collector (Ni/CNT/MnO2); the thickness of the CNT/MnO2 hybrid nanostructured shell is approximately 150 μm and the electrode displays specific capacitances of 231 mF cm−1. When assembling symmetric devices featuring Ni/CNT/MnO2 coaxial electrodes as cathode and anode together with a 1.0 M Na2SO4 aqueous solution as electrolyte, we find energy densities of 10.97 μWh cm−1. These values indicate that our hybrid systems have clear potential as wearable energy storage and harvesting devices.

AB - Manganese oxide (MnO2) has long been investigated as a pseudo-capacitive material for fabricating fiber-shaped supercapacitors but its poor electrical conductivity and its brittleness are clear drawbacks. Here we electrochemically insert nanostructured MnO2 domains into continuously interconnected carbon nanotube (CNT) networks, thus imparting both electrical conductivity and mechanical durability to MnO2. In particular, we synthesize a fiber-shaped coaxial electrode with a nickel fiber as the current collector (Ni/CNT/MnO2); the thickness of the CNT/MnO2 hybrid nanostructured shell is approximately 150 μm and the electrode displays specific capacitances of 231 mF cm−1. When assembling symmetric devices featuring Ni/CNT/MnO2 coaxial electrodes as cathode and anode together with a 1.0 M Na2SO4 aqueous solution as electrolyte, we find energy densities of 10.97 μWh cm−1. These values indicate that our hybrid systems have clear potential as wearable energy storage and harvesting devices.

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Carbon nanotubes and manganese oxide hybrid nanostructures as high performance fiber supercapacitors

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