DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Kim, Hee-Tak | - |
dc.contributor.advisor | 김희탁 | - |
dc.contributor.author | Heo, Jiyun | - |
dc.date.accessioned | 2019-09-03T02:43:26Z | - |
dc.date.available | 2019-09-03T02:43:26Z | - |
dc.date.issued | 2019 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=843271&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/266320 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2019.2,[xi, 37 p. :] | - |
dc.description.abstract | Vanadium redox flow battery (VRFB) is considered as one of the most promising candidate for a large-scale energy storage system. However, commercialization of VRFB has been hindered due to high manufacturing cost of the vanadium electrolyte which is currently prepared by a costly electrolysis method with a limited productivity. To address the problem of high electrolyte production costs, we propose a simple chemical production of impurity-free $V^{3.5+}$ valence state electrolyte. The method features the use of catalyst and organic reducing agent (ORA) which enables reduction of $V^{4+}$ to $V^{3+}$ vanadium ion without releasing any impurity. Among various ORAs, formic acid showed fastest reaction kinetics in combination with Pt/C or PtRu/C catalysts. Activity and stability of catalysts were compared for a proper catalyst selection. In spite of a higher activity of PtRu/C, dissolution of Ru prohibits its use due to a severe gas evolution during cell operation by deposition of Ru onto the electrode. $V^{3.5+}$ electrolyte was successfully produced by combination of formic acid and Pt/C, and excellent VRFB performances were achieved with the electrolyte. A prototype of catalytic reactor employing Pt/C decorated carbon felts was designed and a high quality electrolyte production in continuous manner was demonstrated. We believe the proposed catalytic production of VRFB electrolyte is a breakthrough invention for the VRFB technology, and it would bring significant development of VRFB system in industry. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Vanadium redox flow battery▼a$V^{3.5+}$ electrolyte▼acatalyst▼areducing agent▼acatalytic reaction | - |
dc.subject | 바나듐 레독스 흐름 전지▼a3.5가 바나듐 전해질▼a촉매▼a환원제▼a촉매 반응 | - |
dc.title | Catalytic production of impurity-free $V^{3.5+}$ vanadium electrolyte for vanadium redox flow batteries | - |
dc.title.alternative | 촉매 반응을 이용한 바나듐 레독스 흐름 전지용 고순도 3.5가 전해질의 제조 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :생명화학공학과, | - |
dc.contributor.alternativeauthor | 허지윤 | - |
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