(A) magnetic field-induced through-plane alignment of proton highway in proton exchange membrane자기장을 이용한 고분자 연료전지용 전해질막 내 수소 이온 경로의 수직 방향 정렬

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dc.contributor.advisorKim, Hee-Tak-
dc.contributor.advisor김희탁-
dc.contributor.authorHyun, Jonghyun-
dc.date.accessioned2021-05-12T19:37:46Z-
dc.date.available2021-05-12T19:37:46Z-
dc.date.issued2020-
dc.identifier.urihttp://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=910867&flag=dissertationen_US
dc.identifier.urihttp://hdl.handle.net/10203/284063-
dc.description학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2020.2,[47 p. :]-
dc.description.abstractProton 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.languageeng-
dc.publisher한국과학기술원-
dc.subjectmagnetic alignments▼atungsten disulfides▼aproton conduction▼aproton exchange membrane fuel cells▼acomposite membranes-
dc.subject자기장 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.alternative자기장을 이용한 고분자 연료전지용 전해질막 내 수소 이온 경로의 수직 방향 정렬-
dc.typeThesis(Master)-
dc.identifier.CNRN325007-
dc.description.department한국과학기술원 :생명화학공학과,-
dc.contributor.alternativeauthor현종현-
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