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하영권 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.0
본 연구에서는 고무 발포체의 발포 공정 제어와 내구성 영향인자에 대한 연구를 수행하였다. 친환경 고무 발포체 개발을 위하여, 천연고무인 NR과 합성고무인 SBR, NBR, EPDM의 블랜딩을 통해 라텍스 Foam을 개발하기 위한 recipe를 최적화하였다. 고무 발포체의 내구성에 영향을 미치는 인자로는 Cell 입자 수 와 크기, Filler 등이 있다. 영향인자를 조절, 평가하기 위하여 발포 공정 제어를 통해 Cell 입자 크기 및 수를 조절하고 Scanning Electron Microscope(SEM)을 이용하여 평가하였다. 또한 비율 조절을 통한 고무 발포체를 제작하고 경도 특성을 평가하였다.
Preparation of carbon composites electrode of VRFB for improving electrochemical properties
하영권,홍창국 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
In recent years vanadium redox flow battery(VRFB) has received great attention as one of important energy storage system. Because VRFB has various advantage, such as long cycle life, high efficiency, flexible design, high reliability, low maintenance costs and environmental friendship. VRFB electrode plays an important role by providing sites for the electrochemical reactions between electrode and electrolyte. VRFB electrode is used carbon felt mostly, because carbon felt has good electro conductivity, high specific surface area and so on, as porous carbon fiber materials. But carbon felt has poor electrochemical property, so it caused low energy density. To improve electrochemical property of electrode, graphene/carbonfiber composite was prepared by electrospinning and heat treatment. At the same time, silane coupling agent grafted with graphene oxide(GO) in order to prevent aggregation of GO. So modified graphene oxide(MGO)/PAN based carbon fiber was prepared. This carbon composites were investigated in physical and electrochemical aspects.
Preparation of carbon composites electrode of VRFB for improving electrochemical properties
하영권,홍창국 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1
In recent years vanadium redox flow battery(VRFB) has received great attention as one of important energy storage system. Because VRFB has various advantage, such as long cycle life, high efficiency, flexible design, high reliability, low maintenance costs and environmental friendship. VRFB electrode plays an important role by providing sites for the electrochemical reactions between electrode and electrolyte. VRFB electrode is used carbon felt mostly, because carbon felt has good electro conductivity, high specific surface area and so on, as porous carbon fiber materials. But carbon felt has poor electrochemical property, so it caused low energy density. To improve electrochemical property of electrode, graphene/carbonfiber composite was prepared by electrospinning and heat treatment. At the same time, silane coupling agent grafted with graphene oxide(GO) in order to prevent aggregation of GO. So modified graphene oxide(MGO)/PAN based carbon fiber was prepared. This carbon composites were investigated in physical and electrochemical aspects.