Highly ordered 1D NiCo2O4 nanorods on graphene: An efficient dual-functional hybrid materials for electrochemical energy conversion and storage applications

Aneeya K. Samantara; Swagatika Kamila; Arnab Ghosh; Bikash Kumar Jena

doi:10.1016/j.electacta.2018.01.025

Highly ordered 1D NiCo₂O₄ nanorods on graphene: An efficient dual-functional hybrid materials for electrochemical energy conversion and storage applications

Aneeya K. Samantara, Swagatika Kamila, Arnab Ghosh, Bikash Kumar Jena

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

60 Scopus citations

Abstract

One dimensional porous binary metal oxides exert much more attention for electrochemical energy conversion and storage applications. Herein, we report a simple process for the synthesis of one dimensional mesoporous rod-like NiCo₂O₄ structure (NCO NRs) grown on reduced graphene oxide sheets (RG/NCO NCs). This noble metal free RG/NCO NCs composite manifested as the dual-functional electrode material for the electrochemical oxygen evolution reaction (OER) and supercapacitor applications. The RG/NCO NCs shows significant OER performance with prosperous reaction kinetics with a smaller Tafel slope of 35 mV dec⁻¹. It requires only 313 mV overpotential to deliver 10 mA cm⁻² current density, showing superior OER activity compared to some of the state-of-art electrocatalysts under similar electrochemical conditions. Moreover, the RG/NCO NCs showed enhanced energy storage efficacy in terms of higher specific capacitance (1315 F g⁻¹), long-term operational durability, higher specific energy and power output. The porous structure, higher specific surface area and better electrochemical conductivity of the RG/NCO NCs make it a suitable material for both the energy conversion and storage application. Additionally, to validate the supercapacitor performance, a prototype device in coin cell configuration has been designed and successfully tested to power a LED.

Original language	English
Pages (from-to)	147-157
Number of pages	11
Journal	Electrochimica Acta
Volume	263
DOIs	https://doi.org/10.1016/j.electacta.2018.01.025
State	Published - 10 Feb 2018
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2018 Elsevier Ltd

Funding

BKJ thanks MNRE , New Delhi, India (No. 102/87/2011-NT ), BRNS , Mumbai, India (No. 2013/37P/67/BRNS ) and CSIR , New Delhi, India (Young Scientist Award Project- YSP-2/2013, P-81-113, OLP-65 ) for financial support. AKS acknowledges CSIR for fellowship. SK thanks the DST for fellowship. The authors are also thankful to Dr. D. P. Das, IMMT for the BET surface area measurements. The authors acknowledge Professor P. V. Satyam, IOP for helping in TEM analysis and explanation. The authors thank Dr. S. K. Panda for XPS analysis. The authors thank the director CSIR-IMMT for permission to carry out this study. BKJ thanks MNRE, New Delhi, India (No.102/87/2011-NT), BRNS, Mumbai, India (No.2013/37P/67/BRNS) and CSIR, New Delhi, India (Young Scientist Award Project- YSP-2/2013, P-81-113, OLP-65) for financial support. AKS acknowledges CSIR for fellowship. SK thanks the DST for fellowship. The authors are also thankful to Dr. D. P. Das, IMMT for the BET surface area measurements. The authors acknowledge Professor P. V. Satyam, IOP for helping in TEM analysis and explanation. The authors thank Dr. S. K. Panda for XPS analysis. The authors thank the director CSIR-IMMT for permission to carry out this study.

Funders	Funder number
Council for Scientific and Industrial Research	YSP-2/2013, P-81-113
Ministry of New and Renewable Energy India	102/87/2011-NT, 2013/37P/67/BRNS
Department of Science and Technology, Ministry of Science and Technology, India
Council of Scientific and Industrial Research, India	P-81-113, - YSP-2/2013, OLP-65
Board of Research in Nuclear Sciences

Keywords

Energy density
Graphene
NiCoO
OER
Power density
Supercapacitor

Access to Document

10.1016/j.electacta.2018.01.025

Cite this

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title = "Highly ordered 1D NiCo2O4 nanorods on graphene: An efficient dual-functional hybrid materials for electrochemical energy conversion and storage applications",

abstract = "One dimensional porous binary metal oxides exert much more attention for electrochemical energy conversion and storage applications. Herein, we report a simple process for the synthesis of one dimensional mesoporous rod-like NiCo2O4 structure (NCO NRs) grown on reduced graphene oxide sheets (RG/NCO NCs). This noble metal free RG/NCO NCs composite manifested as the dual-functional electrode material for the electrochemical oxygen evolution reaction (OER) and supercapacitor applications. The RG/NCO NCs shows significant OER performance with prosperous reaction kinetics with a smaller Tafel slope of 35 mV dec−1. It requires only 313 mV overpotential to deliver 10 mA cm−2 current density, showing superior OER activity compared to some of the state-of-art electrocatalysts under similar electrochemical conditions. Moreover, the RG/NCO NCs showed enhanced energy storage efficacy in terms of higher specific capacitance (1315 F g−1), long-term operational durability, higher specific energy and power output. The porous structure, higher specific surface area and better electrochemical conductivity of the RG/NCO NCs make it a suitable material for both the energy conversion and storage application. Additionally, to validate the supercapacitor performance, a prototype device in coin cell configuration has been designed and successfully tested to power a LED.",

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