A hydrophobic blend binder for anti-water flooding of cathode catalyst layers in polymer electrolyte membrane fuel cells

被引：25

作者：

Oh, Keun-Hwan ^{[1
]}

Kim, Wan-Keun ^{[2
]}

Sung, Kyung A. ^{[2
]}

Choo, Min-Ju ^{[2
]}

Nam, Kwan-Woo ^{[1
]}

Choi, Jang Wook ^{[1
]}

Park, Jung-Ki ^{[1
,2
]}

机构：

[1] Korea Adv Inst Sci & Technol, Grad Sch EEWS WCU, Taejon 305701, South Korea

[2] Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn, Taejon 305701, South Korea

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2011年 / 36卷 / 21期

关键词：

Catalyst layer; P(VdF-co-HFP); Hydrophobicity; Water flooding; Glass transition temperature; POLY(ETHER ETHER KETONE); PERFORMANCE; DMFC; MICROSTRUCTURE; SULFONE); IONOMER; PEMFC;

D O I：

10.1016/j.ijhydene.2011.07.116

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report polymer electrolyte membrane fuel cells (PEMFCs) in which poly(vinylidene fluoride-co-hexafluoropropylene) (P(VdF-co-HFP)) copolymer was added to the existing sPEEK binder in cathode catalyst layers (CCLs). Compared to a control case with no such copolymer, the cell with the copolymer exhibits improved performance, particularly in the oxygen mass transport. The improved mass transport behavior is attributed to the copolymer that makes CCLs more hydrophobic and thus suppresses water flooding significantly. Contact angle measurements and various electrochemical characterizations consistently support the copolymer effect for the improved oxygen mass transport. In addition, the introduction of P(VdF-co-HFP) lowers the glass transition temperature of the binder, which contributes to enhancing the adhesion properties between the CCLs and membranes. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：13695 / 13702

页数：8

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