DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Jung, Woochul | - |
dc.contributor.advisor | 정우철 | - |
dc.contributor.author | Nam, Seongwoo | - |
dc.date.accessioned | 2023-06-23T19:32:25Z | - |
dc.date.available | 2023-06-23T19:32:25Z | - |
dc.date.issued | 2023 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=1032803&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/309005 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 신소재공학과, 2023.2,[v, 60 p. :] | - |
dc.description.abstract | Solid oxide fuel cells are devices that directly convert the chemical energy of hydrogen and oxygen into electrical energy, and are attracting attention for their high efficiency and eco-friendliness. Since the recent research trend is to lower the operating temperature of the device, there is a considerable demand for a way to effectively introduce a catalyst to overcome the poor electrochemical activity of the lanthanum strontium manganite–yttria-stabilized zirconia (LSM-YSZ) composite electrode. Herein, I present an electrochemical deposition method that fabricating a PrOx overlayer significantly improves the catalytic activity of composite electrodes with only a short process of less than 4 min, even in an ambient environment. Moreover, it does not require additional processes such as heat treatment. The PrOx-coated electrode exhibits a decrease in initial polarization resistance compared to the bare, and maintained an oxygen reduction reaction characteristic by more than 10 times even after about 400 h of operation at 650 °C. Transmission line model analysis with impedance spectra describes how PrOx improves the reactivity of the oxygen reduction reaction of composite electrodes. Finally, I demonstrate that a two-element material, (Pr, Ce)Ox, was electrochemically deposited. Electrochemical deposition considerably improves the catalytic properties of the cathode via a concise and straightforward process. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | solid oxide fuel cells▼acathode▼acomposite (oxide) electrodes▼acathodic electrochemical deposition▼aPrOx▼a(Pr, Ce) Ox▼atransmission line model | - |
dc.subject | 고체산화물연료전지▼a음극▼a복합 (산화물) 전극▼a전기화학 증착 방법▼a산화프라세오디뮴▼a도핑된 세리아▼a전송선 모델 | - |
dc.title | Electrochemical deposition of nanocatalysts for the catalytic activity improvement of composite oxide electrodes for solid oxide fuel cells | - |
dc.title.alternative | 나노촉매의 전기화학 증착을 통한 고체산화물연료전지용 복합 산화물 전극의 촉매 활성도 개선 연구 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :신소재공학과, | - |
dc.contributor.alternativeauthor | 남성우 | - |
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