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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 33, Number 11
BKCSDE 33(11)
November 20, 2012

Title	Development of Carbon Composite Bipolar Plates for Vanadium Redox Flow Batteries
Author	Nam Jin Lee, Seung-Wook Lee, Ki Jae Kim*, Jae-Hun Kim, Min-Sik Park, Goojin Jeong, Young-Jun Kim, Dongjin Byun
Keywords	Redox flow battery, Bipolar plate, Carbon composite, Electrical conductivity, Electrochemical stability
Abstract	Carbon composite bipolar plates with various carbon black contents were prepared by a compression molding method. The electrical conductivity and electrochemical stability of the bipolar plates have been evaluated. It is found that the electrical conductivity increases with increasing carbon black contents up to 15 wt %. When the carbon black contents are greater than 15 wt %, the electrical conductivity decreases because of a poor compatibility between epoxy resin and carbon black, and a weakening of compaction in the carbon composite bipolar plate. Based on the results, it could be concluded that there are optimum carbon black contents when preparing the carbon composite bipolar plate. Corrosion tests show that the carbon composite bipolar plate with 15 wt % carbon black exhibits better electrochemical stability than a graphite bipolar plate under a highly acidic condition. When the optimized carbon composite bipolar plate is applied to vanadium redox flow cells, the performance of flow cells with the carbon composite bipolar plate is comparable to that of flow cells with the graphite bipolar plate.
Page	3589 - 3592
Full Text	PDF

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