In-plane channel-structured catalyst layer for polymer electrolyte membrane fuel cells = 고분자 전해질 연료전지 촉매층 내 평면 방향 유체 흐름 경로 형성 연구

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In this study, we present a novel catalyst layer (CL) with in-plane flow channels to enhance mass transports in polymer electrolyte membrane fuel cells (PEMFC). The CL having in-plane channels on its surface is fabricated by coating a catalyst layer slurry on a substrate with line pattern and transferring the dried CL from the substrate to a membrane. The membrane electrode assembly (MEA) with the in-plane channel-patterned catalyst layer (IC-CL) shows superior power performances in high current densities investigated compare with conventional flat CL (FCL), indicating significant enhancement in mass transport by the IC-CL. The performance increase is more pronounced when the channel direction is perpendicular to the flow field direction, indicating that the in-plane channels increase the utilization of the CL under land area. Simulation results show that Knudsen diffusion in the CL is facilitated in the presence of the channels. These reasons demonstrate that role of the pattern is same as channel at the bipolar plate and further experimental results show that, additional in-plane direction of channel at CL enhance the mass transport.
Advisors
Kim, Hee Takresearcher김희탁researcher
Description
한국과학기술원 :생명화학공학과,
Publisher
한국과학기술원
Issue Date
2017
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2017.8,[iv, 35 p. :]

Keywords

PEMFC▼acatalyst layer▼apattern▼amass transport▼agas transport; 고분자 전해질 연료전지▼a촉매층▼a물질전달▼a기체 전달

URI
http://hdl.handle.net/10203/243098
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=718619&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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