DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Kim, Hee-Tak | - |
dc.contributor.advisor | 김희탁 | - |
dc.contributor.author | Hyun, Jonghyun | - |
dc.date.accessioned | 2021-05-12T19:37:46Z | - |
dc.date.available | 2021-05-12T19:37:46Z | - |
dc.date.issued | 2020 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=910867&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/284063 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2020.2,[47 p. :] | - |
dc.description.abstract | Proton exchange membranes with high through-plane proton conductivity are enormously required for high performance fuel cells, electrolyzers, and batteries. However, isotropically-distributed proton-conducting channel structures of current membranes presents a limitation. Herein, we report a proton exchange membrane with straight proton-conducting channels aligned in thickness direction, achieved by magnetic field-induced alignment of proton-conductive, paramagnetic, one-dimensional tungsten disulfide nanowires (pms-$WS_2$) distributed in a perfluorinated sulfonic acid (Nafion) membrane. The pms-$WS_2$ nanowires feature straight $WS_2$ nanowire as a core, polystyrenesulfonate (PSS) skin layer, and surface-decorated $Fe_3O_4$ nanoparticles. Molecular dynamics simulation suggests that straight proton-conducting channels are constructed at the interface of Nafion/pms-$WS_2$ due to densely populated sulfuronic acids. Spectroscopic investigation and magnetization measurement prove the through-plane alignment of of pms-$WS_2$ under a weak through-plane magnetic field (0.035 T) during the removal of solvent from membrane cast. Compared with a recast Nafion membrane with same thickness, the through-plane aligned composite membrane exhibits 70% higher proton conductivity and 110% higher power performance in proton exchange membrane fuel cell, demonstrating its efficacy. We identify the through-plane alignment of proton-conductive inorganic 1D material promising for improving power performance of advanced electrochemical devices. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | magnetic alignments▼atungsten disulfides▼aproton conduction▼aproton exchange membrane fuel cells▼acomposite membranes | - |
dc.subject | 자기장 정렬▼a텅스텐 이황화물▼a수소 이온 전도▼a수소 이온교환막 연료전지▼a복합막 | - |
dc.title | (A) magnetic field-induced through-plane alignment of proton highway in proton exchange membrane | - |
dc.title.alternative | 자기장을 이용한 고분자 연료전지용 전해질막 내 수소 이온 경로의 수직 방향 정렬 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :생명화학공학과, | - |
dc.contributor.alternativeauthor | 현종현 | - |
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