A green and scalable dry synthesis of NiCo2O4/graphene nanohybrids for high-performance supercapacitor and enzymeless glucose biosensor applications

Tae Hoon Ko; Sivaprakasam Radhakrishnan; Min Kang Seo; Myung Seob Khil; Hak Yong Kim; Byoung Suhk Kim

doi:10.1016/j.jallcom.2016.11.234

A green and scalable dry synthesis of NiCo₂O₄/graphene nanohybrids for high-performance supercapacitor and enzymeless glucose biosensor applications

Tae Hoon Ko
, Sivaprakasam Radhakrishnan
, Min Kang Seo
, Myung Seob Khil
, Hak Yong Kim
, Byoung Suhk Kim^*

^*Corresponding author for this work

Department of Organic Materials and Textile Engineering

Research output: Contribution to journal › Journal article › peer-review

100 Scopus citations

Abstract

We have prepared NiCo₂O₄ nanoparticles decorated graphene nanosheets (NiCo₂O₄/graphene) nanohybrids via a dry and scalable synthesis technique. FE-SEM and TEM images of as-prepared NiCo₂O₄/graphene nanohybrids showed uniformly well decoration of NiCo₂O₄ nanoparticles on the surfaces of graphene nanosheets. The electrochemical performance of NiCo₂O₄/graphene nanohybrids was analyzed by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The NiCo₂O₄-decorated graphene electrode exhibited a maximum specific capacitance of 886 Fg⁻¹ at a scan rate of 5.0 mVs⁻¹, and also showed high cyclic stability with retention of 82.1% after 2000 cycle. As an enzymeless glucose biosensor, the NiCo₂O₄/graphene modified GC electrode showed excellent electro-catalytic behavior towards glucose with higher oxidation peak current.

Original language	English
Pages (from-to)	193-200
Number of pages	8
Journal	Journal of Alloys and Compounds
Volume	696
DOIs	https://doi.org/10.1016/j.jallcom.2016.11.234
State	Published - 2017.03.5

Keywords

Electrode
Glucose biosensor
Graphene nanosheet
Nickel cobaltite
Supercapacitor

Quacquarelli Symonds(QS) Subject Topics

Materials Science
Engineering - Mechanical

Access to Document

10.1016/j.jallcom.2016.11.234

Cite this

@article{3bebae68a08e4e5581237d5be692ec4f,

title = "A green and scalable dry synthesis of NiCo2O4/graphene nanohybrids for high-performance supercapacitor and enzymeless glucose biosensor applications",

abstract = "We have prepared NiCo2O4 nanoparticles decorated graphene nanosheets (NiCo2O4/graphene) nanohybrids via a dry and scalable synthesis technique. FE-SEM and TEM images of as-prepared NiCo2O4/graphene nanohybrids showed uniformly well decoration of NiCo2O4 nanoparticles on the surfaces of graphene nanosheets. The electrochemical performance of NiCo2O4/graphene nanohybrids was analyzed by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The NiCo2O4-decorated graphene electrode exhibited a maximum specific capacitance of 886 Fg−1 at a scan rate of 5.0 mVs−1, and also showed high cyclic stability with retention of 82.1\% after 2000 cycle. As an enzymeless glucose biosensor, the NiCo2O4/graphene modified GC electrode showed excellent electro-catalytic behavior towards glucose with higher oxidation peak current.",

keywords = "Electrode, Glucose biosensor, Graphene nanosheet, Nickel cobaltite, Supercapacitor",

author = "Ko, \{Tae Hoon\} and Sivaprakasam Radhakrishnan and Seo, \{Min Kang\} and Khil, \{Myung Seob\} and Kim, \{Hak Yong\} and Kim, \{Byoung Suhk\}",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2017",

month = mar,

day = "5",

doi = "10.1016/j.jallcom.2016.11.234",

language = "English",

volume = "696",

pages = "193--200",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

}

TY - JOUR

T1 - A green and scalable dry synthesis of NiCo2O4/graphene nanohybrids for high-performance supercapacitor and enzymeless glucose biosensor applications

AU - Ko, Tae Hoon

AU - Radhakrishnan, Sivaprakasam

AU - Seo, Min Kang

AU - Khil, Myung Seob

AU - Kim, Hak Yong

AU - Kim, Byoung Suhk

PY - 2017/3/5

Y1 - 2017/3/5

N2 - We have prepared NiCo2O4 nanoparticles decorated graphene nanosheets (NiCo2O4/graphene) nanohybrids via a dry and scalable synthesis technique. FE-SEM and TEM images of as-prepared NiCo2O4/graphene nanohybrids showed uniformly well decoration of NiCo2O4 nanoparticles on the surfaces of graphene nanosheets. The electrochemical performance of NiCo2O4/graphene nanohybrids was analyzed by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The NiCo2O4-decorated graphene electrode exhibited a maximum specific capacitance of 886 Fg−1 at a scan rate of 5.0 mVs−1, and also showed high cyclic stability with retention of 82.1% after 2000 cycle. As an enzymeless glucose biosensor, the NiCo2O4/graphene modified GC electrode showed excellent electro-catalytic behavior towards glucose with higher oxidation peak current.

AB - We have prepared NiCo2O4 nanoparticles decorated graphene nanosheets (NiCo2O4/graphene) nanohybrids via a dry and scalable synthesis technique. FE-SEM and TEM images of as-prepared NiCo2O4/graphene nanohybrids showed uniformly well decoration of NiCo2O4 nanoparticles on the surfaces of graphene nanosheets. The electrochemical performance of NiCo2O4/graphene nanohybrids was analyzed by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The NiCo2O4-decorated graphene electrode exhibited a maximum specific capacitance of 886 Fg−1 at a scan rate of 5.0 mVs−1, and also showed high cyclic stability with retention of 82.1% after 2000 cycle. As an enzymeless glucose biosensor, the NiCo2O4/graphene modified GC electrode showed excellent electro-catalytic behavior towards glucose with higher oxidation peak current.

KW - Electrode

KW - Glucose biosensor

KW - Graphene nanosheet

KW - Nickel cobaltite

KW - Supercapacitor

UR - https://www.scopus.com/pages/publications/84998693455

U2 - 10.1016/j.jallcom.2016.11.234

DO - 10.1016/j.jallcom.2016.11.234

M3 - Journal article

AN - SCOPUS:84998693455

SN - 0925-8388

VL - 696

SP - 193

EP - 200

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -