Nafion fiber matrix built-in catalyst layer for improved polymer electrolyte membrane fuel cell performance = 향상된 고분자 막 전해질 연료전지 성능을 위한 나피온 섬유 매트릭스 내장 촉매층 개발

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Polymer electrolyte membrane fuel cell (PEMFC) technology has required significant cost competitiveness for mass commercialization of fuel cell electric vehicle. In order to lower the price of the fuel cell, studies are being conducted to achieve high performance while maintaining the same amount of platinum loading in catalyst layer (CL). In this study, the performance improvement was observed by using Nafion fiber which has proton conductivity as a 1-dimensional material. Two different structures of the catalyst layer according to the diameter control of Nafion fiber are presented. Depending on the difference of size between Nafion fiber diameter and the catalyst layer thickness, a catalyst layer with a macroscopic proton channel (Nafion fiber embedded-CL) and a catalyst layer with an extended gas-catalyst layer interface (Nafion fiber supported-CL) were implemented. Nafion fiber embedded CL showed 33% improved cell performance at 0.6V due to the increase of the proton transport. Nafion fiber supported CL showed 25% improved cell performance at 0.4V due to the increase of the gas transport. From the results of each of the proton and gas transport enhancement, Nafion fiber matrix can be applied as a flexible versatile platform for catalyst layer structure modulation to improve fuel cell performance.
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

Polymer electrolyte membrane fuel cell▼aNafion fiber matrix▼aProton transport▼aGas transport; 고분자 전해질막 연료전지▼a나피온 섬유 매트릭스▼a수소이온 전달▼a기체전달

URI
http://hdl.handle.net/10203/243093
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=718622&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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