Experimental analyses of low humidity operation properties of SiO2-containing catalyst layers for polymer electrolyte fuel cells

被引:12
作者
Inoue, Naoki [1 ]
Uchida, Makoto [2 ]
Watanabe, Masahiro [2 ]
Uchida, Hiroyuki [2 ,3 ]
机构
[1] Interdisciplinary Grad Sch Med & Engn, Kofu, Yamanashi 4008510, Japan
[2] Univ Yamanashi, Fuel Cell Nanomat Ctr, Kofu, Yamanashi 4008510, Japan
[3] Univ Yamanashi, Clean Energy Res Ctr, Kofu, Yamanashi 4008510, Japan
关键词
Fuel cell; SiO2; Catalyst layer; PEFC; GAS-DIFFUSION ELECTRODES; OXYGEN REDUCTION; PARTICLES; MEMBRANES; PEMFC; IONOMER; ANODE; PERFORMANCE; PLATINUM; SILICA;
D O I
10.1016/j.electacta.2012.10.134
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Electrochemical operation properties of SiO2-containing catalyst layers (SiO2-CLs) under low humidity were clarified experimentally in a polymer electrolyte fuel cell (PEFC). The mass activities at 0.85 V and current densities at 0.7 V increased with increasing SiO2 content below 53% RH at 80 degrees C. The use of SiO2-CLs led to decreased ohmic resistance due to increased water content. It was found that such an increase in water content in the SiO2-CLs increased the electrochemically active surface area (ECA) of the Pt catalyst, due to enhancement of the proton-conducting network in the electrolyte binder, and suppressed the specific adsorption of sulfonate anions on the Pt surface. It was also clarified that the SiO2 addition in the CL promoted the back-diffusion of water generated at the cathode to the anode, resulting in an increased O-2 gas diffusion rate to the cathode-CL/PEM interface, accompanied by an increased water content in the membrane. All of these factors greatly contributed to improve the cell performance under low humidity. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:807 / 813
页数:7
相关论文
共 30 条
[1]   Effect of Hygroscopic Platinum/Titanium Dioxide Particles in the Anode Catalyst Layer on the PEMFC Performance [J].
Chao, Wen-Kai ;
Huang, Rong-Hsing ;
Huang, Chueh-Jung ;
Hsueh, Kan-Lin ;
Shieu, Fuh-Sheng .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2010, 157 (07) :B1012-B1018
[2]   Novel gas diffusion layer with water management function for PEMFC [J].
Chen, J ;
Matsuura, T ;
Hori, M .
JOURNAL OF POWER SOURCES, 2004, 131 (1-2) :155-161
[3]   Preparation of highly dispersed SiO2 and Pt particles in Nafion® 112 for self-humidifying electrolyte membranes in fuel cells [J].
Hagihara, Hiroki ;
Uchida, Hiroyuki ;
Watanabe, Masahiro .
ELECTROCHIMICA ACTA, 2006, 51 (19) :3979-3985
[4]   Investigation of self-humidifying anode in polymer electrolyte fuel cells [J].
Han, M. ;
Chan, S. H. ;
Jiang, S. P. .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2007, 32 (03) :385-391
[5]   In Situ ATR-FTIR Analysis of the Structure of Nafion-Pt/C and Nafion-Pt3Co/C Interfaces in Fuel Cell [J].
Hanawa, Hirotaka ;
Kunimatsu, Keiji ;
Watanabe, Masahiro ;
Uchida, Hiroyuki .
JOURNAL OF PHYSICAL CHEMISTRY C, 2012, 116 (40) :21401-21406
[6]   SiO2-containing catalyst layers for PEFCs operating under low humidity [J].
Inoue, Naoki ;
Uchida, Makoto ;
Watanabe, Masahiro ;
Uchida, Hiroyuki .
ELECTROCHEMISTRY COMMUNICATIONS, 2012, 16 (01) :100-102
[7]   Improvement of low-humidity performance of PEMFC by addition of hydrophilic SiO2 particles to catalyst layer [J].
Jung, Un Ho ;
Park, Ki Tae ;
Park, Eun Hee ;
Kim, Sung Hyun .
JOURNAL OF POWER SOURCES, 2006, 159 (01) :529-532
[8]   Influence of decomposition products from perfluorosulfonic acid membrane on fuel cell performance [J].
Kabasawa, Akihiro ;
Uchida, Hiroyuki ;
Watanabe, Masahiro .
ELECTROCHEMICAL AND SOLID STATE LETTERS, 2008, 11 (10) :B190-B192
[9]   New evaluation method for the effectiveness of platinum/carbon electrocatalysts under operating conditions [J].
Lee, Myoungseok ;
Uchida, Makoto ;
Yano, Hiroshi ;
Tryk, Donald A. ;
Uchida, Hiroyuki ;
Watanabe, Masahiro .
ELECTROCHIMICA ACTA, 2010, 55 (28) :8504-8512
[10]   Low equivalent weight short-side-chain perfluorosulfonic acid ionomers in fuel cell cathode catalyst layers [J].
Lei, Chao ;
Bessarabov, Dmitri ;
Ye, Siyu ;
Xie, Zhong ;
Holdcroft, Steven ;
Navessin, Titichai .
JOURNAL OF POWER SOURCES, 2011, 196 (15) :6168-6176