All-solid-state flexible asymmetric micro supercapacitors based on cobalt hydroxide and reduced graphene oxide electrodes

Su Chan Lee; U. M. Patil; Sun Jun Kim; Seokhoon Ahn; Seok Won Kang; Seong Chan Jun

doi:10.1039/c6ra06034j

All-solid-state flexible asymmetric micro supercapacitors based on cobalt hydroxide and reduced graphene oxide electrodes

Su Chan Lee, U. M. Patil, Sun Jun Kim, Seokhoon Ahn, Seok Won Kang, Seong Chan Jun

Department of Mechanical Engineering

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

35 Citations (Scopus)

Abstract

In-plane micro supercapacitors (micro-SC) have attracted interest due to their high areal and volumetric capacitance that is dependent upon their electrode structure. This study proposes simply-fabricated micro-SCs based on cobalt hydroxide and electrochemically-reduced graphene oxide (erGO). The Au electron collector was prepared via photolithography, and Co(OH)₂ and erGO were deposited on the Au surface via electrodeposition. Using facile two-step fabrication method and cost-effective materials, the prepared micro-SCs exhibit good electrochemical performance in PVA-KOH-KI solid electrolyte. The in-plane interdigitated electrode maximizes the areal capacitance by increasing the facing area between the anode and cathode. The micro-SC presents good power density (100.38 μW cm^-2) and a wide potential window due to the electric double-layer properties of erGO and pseudocapacitive performance of Co(OH)₂. These fabricated micro-SCs are flexible and can be used in various wearable and small-scale energy storage devices.

Original language	English
Pages (from-to)	43844-43854
Number of pages	11
Journal	RSC Advances
Volume	6
Issue number	50
DOIs	https://doi.org/10.1039/c6ra06034j
Publication status	Published - 2016

Bibliographical note

Funding Information:
This work was partially supported by the Priority Research Centers Program (2009-0093823), the Basic Science Research Program (grant number 2013063062), the Korean Government (MSIP) (No. 2015R1A5A1037668) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (MEST), and the Korea Research Fellowship Program funded by the Ministry of Science, ICT and Future Planning through the National Research Foundation of Korea (2015-11-1063).

Publisher Copyright:
© 2016 The Royal Society of Chemistry.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Chemical Engineering(all)

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10.1039/c6ra06034j

Cite this

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title = "All-solid-state flexible asymmetric micro supercapacitors based on cobalt hydroxide and reduced graphene oxide electrodes",

abstract = "In-plane micro supercapacitors (micro-SC) have attracted interest due to their high areal and volumetric capacitance that is dependent upon their electrode structure. This study proposes simply-fabricated micro-SCs based on cobalt hydroxide and electrochemically-reduced graphene oxide (erGO). The Au electron collector was prepared via photolithography, and Co(OH)2 and erGO were deposited on the Au surface via electrodeposition. Using facile two-step fabrication method and cost-effective materials, the prepared micro-SCs exhibit good electrochemical performance in PVA-KOH-KI solid electrolyte. The in-plane interdigitated electrode maximizes the areal capacitance by increasing the facing area between the anode and cathode. The micro-SC presents good power density (100.38 μW cm-2) and a wide potential window due to the electric double-layer properties of erGO and pseudocapacitive performance of Co(OH)2. These fabricated micro-SCs are flexible and can be used in various wearable and small-scale energy storage devices.",

author = "Lee, {Su Chan} and Patil, {U. M.} and Kim, {Sun Jun} and Seokhoon Ahn and Kang, {Seok Won} and Jun, {Seong Chan}",

note = "Funding Information: This work was partially supported by the Priority Research Centers Program (2009-0093823), the Basic Science Research Program (grant number 2013063062), the Korean Government (MSIP) (No. 2015R1A5A1037668) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (MEST), and the Korea Research Fellowship Program funded by the Ministry of Science, ICT and Future Planning through the National Research Foundation of Korea (2015-11-1063). Publisher Copyright: {\textcopyright} 2016 The Royal Society of Chemistry.",

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AU - Patil, U. M.

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AU - Ahn, Seokhoon

AU - Kang, Seok Won

AU - Jun, Seong Chan

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PY - 2016

Y1 - 2016

N2 - In-plane micro supercapacitors (micro-SC) have attracted interest due to their high areal and volumetric capacitance that is dependent upon their electrode structure. This study proposes simply-fabricated micro-SCs based on cobalt hydroxide and electrochemically-reduced graphene oxide (erGO). The Au electron collector was prepared via photolithography, and Co(OH)2 and erGO were deposited on the Au surface via electrodeposition. Using facile two-step fabrication method and cost-effective materials, the prepared micro-SCs exhibit good electrochemical performance in PVA-KOH-KI solid electrolyte. The in-plane interdigitated electrode maximizes the areal capacitance by increasing the facing area between the anode and cathode. The micro-SC presents good power density (100.38 μW cm-2) and a wide potential window due to the electric double-layer properties of erGO and pseudocapacitive performance of Co(OH)2. These fabricated micro-SCs are flexible and can be used in various wearable and small-scale energy storage devices.

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All-solid-state flexible asymmetric micro supercapacitors based on cobalt hydroxide and reduced graphene oxide electrodes

Abstract

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