Journal
RSC ADVANCES
Volume 6, Issue 50, Pages 43844-43854Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra06034j
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Funding
- Priority Research Centers Program [2009-0093823]
- Basic Science Research Program [2013063062]
- Korean Government (MSIP) through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology (MEST) [2015R1A5A1037668]
- Korea Research Fellowship Program - Ministry of Science, ICT and Future Planning through the National Research Foundation of Korea [2015-11-1063]
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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 mu W 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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