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Nano Research 2019, 12(10): 2597-2608 https://doi.org/10.1007/s12274-019-2492-7
Research Article | Issue | Published: 15 August 2019

Multifunctional core-shell-like nanoarchitectures for hybrid supercapacitors with high capacity and long-term cycling durability

Show Author's Information S. Chandra Sekhar1,  Goli Nagaraju1,2,  Bhimanaboina Ramulu1,  Sk. Khaja Hussain1,  D. Narsimulu1,  Jae Su Yu1( )
Department of Electronic Engineering, Institute for Wearable Convergence Electronics,Kyung Hee University, 1732 Deogyeong-daero,Gihung-gu, Yongin-si, Gyeonggi-do,17104,Republic of Korea;
Department of Chemical Engineering,College of Engineering, Kyung Hee University, 1732 Deogyeong-daero,Gihung-gu, Yongin-si, Gyeonggi-do,17104,Republic of Korea;
Keywords:
copper hydroxide, layered double hydroxides, core-shell, hybrid supercapacitors, energy density, self-powered devices
Topics:
Aluminum compoundsCopper compoundsElectrodesElectrolytesGrapheneNickel compoundsPotassium hydroxideSol-cellsSolar energySupercapacitorTransition metalsTransitionmetal oxides
Cite this article:
Chandra Sekhar S, Nagaraju G, Ramulu B, et al. Multifunctional core-shell-like nanoarchitectures for hybrid supercapacitors with high capacity and long-term cycling durability. Nano Research, 2019, 12(10): 2597-2608. https://doi.org/10.1007/s12274-019-2492-7
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Abstract Full text Electronic supplementary material About this article

Transition metal oxide/hydroxide with multifunctional hierarchical nanostructures has attracted widespread attention in supercapacitors (SCs) because of their large accessible surface area, high electrochemical activity and superior redox chemistry. Herein, core-shell-like copper (Cu) hydroxide nanotube arrays grafted nickel aluminum layered double hydroxide nanosheets were facilely synthesized on porous Cu foam (CH NTAs@NiAl LDH NSs) for use as an efficient battery-type electrode in hybrid SCs. With the synergistic effects of NiAl LDH NSs on well-adhered CH NTAs/CF, the core-shell-like composite (prepared for 24 h) delivered a maximum areal capacity of 334.3 µAh/cm2 at a current density of 3 mA/cm2 in 2 M KOH electrolyte, which is comparatively higher than other samples synthesized at different growth times. Moreover, the core-shell-like CH NTAs@NiAl LDH NSs-24 demonstrated an outstanding cycling stability of 134.3% after 10, 000 cycles. Utilizing high capacity and stability of CH NTAs@NiAl LDH NSs-24, a pouch-type hybrid SC was further assembled with core-shell-like composite as a positive electrode and reduced graphene oxide as a negative electrode with a filter paper as a separator in aqueous alkaline electrolyte. The hybrid SC showed a high areal capacity of 250 µAh/cm2 at 2 mA/cm2 with maximum areal energy and power densities of 181.9 µWh/cm2 and 24, 991.5 µW/cm2, respectively. Successfully harvesting the solar energy via solar cell panel and subsequently delivering the stored energy to switching and proximity applications also demonstrated the real-time applicability of our hybrid SCs.


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Electronic supplementary material
About this article

Multifunctional core-shell-like nanoarchitectures for hybrid supercapacitors with high capacity and long-term cycling durability

Show Author's information S. Chandra Sekhar1, Goli Nagaraju1,2, Bhimanaboina Ramulu1, Sk. Khaja Hussain1, D. Narsimulu1, Jae Su Yu1( )
Department of Electronic Engineering, Institute for Wearable Convergence Electronics,Kyung Hee University, 1732 Deogyeong-daero,Gihung-gu, Yongin-si, Gyeonggi-do,17104,Republic of Korea;
Department of Chemical Engineering,College of Engineering, Kyung Hee University, 1732 Deogyeong-daero,Gihung-gu, Yongin-si, Gyeonggi-do,17104,Republic of Korea;

Abstract

Transition metal oxide/hydroxide with multifunctional hierarchical nanostructures has attracted widespread attention in supercapacitors (SCs) because of their large accessible surface area, high electrochemical activity and superior redox chemistry. Herein, core-shell-like copper (Cu) hydroxide nanotube arrays grafted nickel aluminum layered double hydroxide nanosheets were facilely synthesized on porous Cu foam (CH NTAs@NiAl LDH NSs) for use as an efficient battery-type electrode in hybrid SCs. With the synergistic effects of NiAl LDH NSs on well-adhered CH NTAs/CF, the core-shell-like composite (prepared for 24 h) delivered a maximum areal capacity of 334.3 µAh/cm2 at a current density of 3 mA/cm2 in 2 M KOH electrolyte, which is comparatively higher than other samples synthesized at different growth times. Moreover, the core-shell-like CH NTAs@NiAl LDH NSs-24 demonstrated an outstanding cycling stability of 134.3% after 10, 000 cycles. Utilizing high capacity and stability of CH NTAs@NiAl LDH NSs-24, a pouch-type hybrid SC was further assembled with core-shell-like composite as a positive electrode and reduced graphene oxide as a negative electrode with a filter paper as a separator in aqueous alkaline electrolyte. The hybrid SC showed a high areal capacity of 250 µAh/cm2 at 2 mA/cm2 with maximum areal energy and power densities of 181.9 µWh/cm2 and 24, 991.5 µW/cm2, respectively. Successfully harvesting the solar energy via solar cell panel and subsequently delivering the stored energy to switching and proximity applications also demonstrated the real-time applicability of our hybrid SCs.

Keywords: copper hydroxide, layered double hydroxides, core-shell, hybrid supercapacitors, energy density, self-powered devices

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Publication history
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Acknowledgements

Publication history

Received: 19 April 2019
Revised: 20 July 2019
Accepted: 27 July 2019
Published: 15 August 2019
Issue date: October 2019

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Acknowledgements

Acknowledgements

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (Nos. 2017R1A2B4011998 and 2018R1A6A1A03025708).

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