Development of advanced stack materials for the Zinc/Bromine redox flow battery = 아연 브롬 레독스 흐름 전지용 향상된 스택 소재 개발 연구

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The zinc/bromine redox flow battery is one of the promising energy storage systems for energy storage systems due to the lower cost and its higher energy density compared with other kinds of RFBs. In this study, core cell stack materials were investigated in order to improve the cell performance of zinc/bromine redox flow battery. First, a combination of homo polypropylene, CNT, and other carbon fillers for an electrode for the zinc/bromine redox flow battery was studied. Testing of this battery showed improved electrical conductivity, mechanical properties, and charge-discharge performance compared with conventional carbon-based electrodes. The result showed that a zinc/bromine redox flow battery equipped with the polypropylene carbon composite electrode with an optimum CNT content has a better performance and is more suitable than other carbon composite materials for bipolar plate of a zinc/bromine redox flow battery. Second, the new slurry coating method for cathode activation layer of the zinc/bromine redox flow battery was investigated. A higher active surface area is required for the bromine-side electrode because the overall process of bromine-side is slower than zinc-side reactions. The results showed that the new slurry coating method has successful results to improve the long term stability and the charge-discharge performance compared to the conventional coating method. In addition, new slurry coating method can be applied for the mass industrial production when commercialization. Lastly, the coated separator of the zinc/bromine redox flow battery was investigated in order to decrease bromine diffusion and increase durability resulting in the improvement of the performance of the zinc/bromine redox flow battery. As a result, it is suggested that the silica coating on the separator is a promising potential to improve the performance of the zinc/bromine redox flow battery.
Advisors
Park, O Okresearcher박오옥researcher
Description
한국과학기술원 :생명화학공학과,
Publisher
한국과학기술원
Issue Date
2016
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 생명화학공학과, 2016.8,[viii, 82 p. :]

Keywords

activation layer▼abipolar plate▼acarbon nanotube▼aseparator▼azinc/bromine redox flow battery; 활성층▼a카본나노튜브▼a분리막▼a아연 브롬 레독스 흐름 전지

URI
http://hdl.handle.net/10203/264862
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=868083&flag=dissertation
Appears in Collection
CBE-Theses_Ph.D.(박사논문)
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