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2P-131 Facile Synthesized Polypyrrole/Silica Core-Shell for Supercapacitor
한호성,조성훈 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
Polypyrrole (PPy) and Silica (Si) were successfully formed as a nanostructured core-shell. In this work, the synthesized PPy/Si core-shells were used as symmetric electrodes for two-electrode supercapacitor. The morphology and structural properties of samples were determined by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and fourier-transform infrared (FT-IR) spectroscopy. The electrochemical properties of sample have been investigated using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge-discharge test. The results of this paper have shown that the supercapacitor using PPy/Si core-shell as symmetric electrodes has mass capacitance of 69.020 F/g and power density of 300.08 W/kg through electrochemical analyses.
한호성,조성훈 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
This work describes solid-state asymmetric supercapacitors (ASCs), composed of aniline oligomers as a cathode, reduced graphene sheet as an anode and sealed with solid electrolyte. This research clarifies the synergetic effects on electrical and electrochemical performances resulting from of combination between aniline oligomers and waterdispersible graphene (WDG) sheet. The electrical and electrochemical properties of ASCs were highly dependent on the protonation levels of aniline oligomers including aniline tetramer, aniline trimer, and aniline dimer. The aniline tetramer with an appropriate chain length provided sufficient carrier transport within the cathode compared to the other oligomers. The ASC composed of aniline tetramer/WDG exhibited high areal capacitance (62.2 mF/cm2), volumetric capacitance (207.4 F/cm3), and good cycling stability (97.2% after 2000 cycles and 90.4% after 10000 cycles).
대량의 골 및 연부조직 결손을 동반한 분쇄 경골 골절에서의 급성 단축술과 점진적 연장술 - 증례 보고 -
한호성,허정규,송철호,백구현,이영호,공현식,Han, Ho-Sung,Huh, Jung-Kyu,Song, Cheol-Ho,Baek, Goo-Hyun,Lee, Young-Ho,Gong, Hyun-Sik 대한미세수술학회 2011 Archives of reconstructive microsurgery Vol.20 No.1
Traditional management of comminuted tibia fractures with massive bone and soft tissue defect includes soft tissue coverage and bone grafting. However, this method requires a large flap and a substantial amount of bone graft. Acute shortening can reduce the amount of required soft tissue and bone graft. We report a case of open tibia and fibula fracture with severe bone and soft tissue defect that was successfully treated by acute shortening of the tibia with immediate fibular strut bone graft and then by gradual lengthening of the tibia at its proximal metaphysis.
Facile synthesis of 3D conducting hydrogel with enhanced electrical and electrochemical performances
한호성,조성훈 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
In this research, we have investigated on fabrication of conducting hydrogel without using polymeric binders. Gelation could be achieved by strong electrostatic interactions within the hydrogel structure. It was evident that the hydrated dopant was effective to induce stronger molecular interactions and better electrochemical performances. Also, as-prepared PPy hydrogel has shown highly porous structure, enabling facile adsorption/desorption of electrolyte molecules