Controlled electrochemical growth of Co(OH)2 flakes on 3D multilayered graphene foam for high performance supercapacitors

Umakant M. Patil; Min Sik Nam; Ji Soo Sohn; Sachin B. Kulkarni; Ryung Shin; Shinill Kang; Seok Lee; Jae Hun Kim; Seong Chan Jun

doi:10.1039/c4ta03953j

Controlled electrochemical growth of Co(OH)₂ flakes on 3D multilayered graphene foam for high performance supercapacitors

Umakant M. Patil, Min Sik Nam, Ji Soo Sohn, Sachin B. Kulkarni, Ryung Shin, Shinill Kang, Seok Lee, Jae Hun Kim, Seong Chan Jun

Department of Mechanical Engineering

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

112 Citations (Scopus)

Abstract

The present research describes successful enchase of Co(OH)₂ microflakes by the potentiodynamic mode of electro-deposition (PED) on porous, light weight, conducting 3D multilayered graphene foam (MGF) and their synergistic effect on improving the supercapacitive performance. Structural and morphological analyses reveal uniform growth of Co(OH)₂ microflakes with an average flake width of ∼30 nm on the MGF surface. Moreover, electrochemical capacitive measurements of the Co(OH)₂/MGF electrode exhibit a high specific capacitance of ∼1030 F g^-1 with ∼37 W h kg^-1 energy and ∼18 kW kg^-1 power density at 9.09 A g^-1 current density. The superior pseudoelectrochemical properties of cobalt hydroxide are synergistically decorated with high surface area offered by a conducting, porous 3D graphene framework, which stimulates the effective utilization of redox characteristics and mutually improves electrochemical capacitive performance with charge transport and storage. This work evokes scalable electrochemical synthesis with the enhanced supercapacitive performance of the Co(OH)₂/MGF electrode in energy storage devices.

Original language	English
Pages (from-to)	19075-19083
Number of pages	9
Journal	Journal of Materials Chemistry A
Volume	2
Issue number	44
DOIs	https://doi.org/10.1039/c4ta03953j
Publication status	Published - 2014 Nov 28

Bibliographical note

Publisher Copyright:
© 2014 the Partner Organisations.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Renewable Energy, Sustainability and the Environment
Materials Science(all)

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1039/c4ta03953j

Cite this

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title = "Controlled electrochemical growth of Co(OH)2 flakes on 3D multilayered graphene foam for high performance supercapacitors",

abstract = "The present research describes successful enchase of Co(OH)2 microflakes by the potentiodynamic mode of electro-deposition (PED) on porous, light weight, conducting 3D multilayered graphene foam (MGF) and their synergistic effect on improving the supercapacitive performance. Structural and morphological analyses reveal uniform growth of Co(OH)2 microflakes with an average flake width of ∼30 nm on the MGF surface. Moreover, electrochemical capacitive measurements of the Co(OH)2/MGF electrode exhibit a high specific capacitance of ∼1030 F g-1 with ∼37 W h kg-1 energy and ∼18 kW kg-1 power density at 9.09 A g-1 current density. The superior pseudoelectrochemical properties of cobalt hydroxide are synergistically decorated with high surface area offered by a conducting, porous 3D graphene framework, which stimulates the effective utilization of redox characteristics and mutually improves electrochemical capacitive performance with charge transport and storage. This work evokes scalable electrochemical synthesis with the enhanced supercapacitive performance of the Co(OH)2/MGF electrode in energy storage devices.",

author = "Patil, {Umakant M.} and Nam, {Min Sik} and Sohn, {Ji Soo} and Kulkarni, {Sachin B.} and Ryung Shin and Shinill Kang and Seok Lee and Kim, {Jae Hun} and Jun, {Seong Chan}",

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AU - Patil, Umakant M.

AU - Nam, Min Sik

AU - Sohn, Ji Soo

AU - Kulkarni, Sachin B.

AU - Shin, Ryung

AU - Kang, Shinill

AU - Lee, Seok

AU - Kim, Jae Hun

AU - Jun, Seong Chan

PY - 2014/11/28

Y1 - 2014/11/28

N2 - The present research describes successful enchase of Co(OH)2 microflakes by the potentiodynamic mode of electro-deposition (PED) on porous, light weight, conducting 3D multilayered graphene foam (MGF) and their synergistic effect on improving the supercapacitive performance. Structural and morphological analyses reveal uniform growth of Co(OH)2 microflakes with an average flake width of ∼30 nm on the MGF surface. Moreover, electrochemical capacitive measurements of the Co(OH)2/MGF electrode exhibit a high specific capacitance of ∼1030 F g-1 with ∼37 W h kg-1 energy and ∼18 kW kg-1 power density at 9.09 A g-1 current density. The superior pseudoelectrochemical properties of cobalt hydroxide are synergistically decorated with high surface area offered by a conducting, porous 3D graphene framework, which stimulates the effective utilization of redox characteristics and mutually improves electrochemical capacitive performance with charge transport and storage. This work evokes scalable electrochemical synthesis with the enhanced supercapacitive performance of the Co(OH)2/MGF electrode in energy storage devices.

AB - The present research describes successful enchase of Co(OH)2 microflakes by the potentiodynamic mode of electro-deposition (PED) on porous, light weight, conducting 3D multilayered graphene foam (MGF) and their synergistic effect on improving the supercapacitive performance. Structural and morphological analyses reveal uniform growth of Co(OH)2 microflakes with an average flake width of ∼30 nm on the MGF surface. Moreover, electrochemical capacitive measurements of the Co(OH)2/MGF electrode exhibit a high specific capacitance of ∼1030 F g-1 with ∼37 W h kg-1 energy and ∼18 kW kg-1 power density at 9.09 A g-1 current density. The superior pseudoelectrochemical properties of cobalt hydroxide are synergistically decorated with high surface area offered by a conducting, porous 3D graphene framework, which stimulates the effective utilization of redox characteristics and mutually improves electrochemical capacitive performance with charge transport and storage. This work evokes scalable electrochemical synthesis with the enhanced supercapacitive performance of the Co(OH)2/MGF electrode in energy storage devices.

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