Characterisation of Nanocarbon-Based Gas Diffusion Media by Electrochemical Impedance Spectroscopy

被引:24
作者
Stampino, P. Gallo [1 ,2 ]
Omati, L. [1 ,2 ]
Cristiani, C. [1 ,2 ]
Dotelli, G. [1 ,2 ]
机构
[1] Politecn Milan, Dipartimento Chim Mat & Ingn Chim G Natta, I-20133 Milan, Italy
[2] INSTM RU POLIMI, I-20133 Milan, Italy
关键词
Electrochemical Impedance Spectroscopy; Gas Diffusion Layer; Multi-Wall Carbon Nanotubes (CNT); Nanocarbon-Based Materials; PEM Fuel Cell Application; FUEL-CELLS; MEMBRANE; PERFORMANCE; SUPPORTS; LAYERS;
D O I
10.1002/fuce.200900126
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
A multi-wall carbon nanotubes (MWCNTs)-based gas diffusion medium (GDM) was prepared, where carbon black was partially substituted by carbon nanotube (CNT) in the formulation of the micro-porous layer (MPL). A rheological analysis of the ink used to coat the gas diffusion layer (GDL) was previously performed to correlate viscosities with the slurry composition. Shear thinning inks with viscosity of 0.4 (Pa s(-1)) were obtained for a composition containing 10 wt.-% of CNT and 12 wt.-% of fluorinated polymer. Using the doctor-blade technique, a coating thickness of about 100-150 mu m was obtained. Moreover, electrochemical performance of a single cell assembled with the CNT-based GDM was compared with that obtained with a sample without CNTs. In order to better understand the role of CNTs, electrochemical impedance spectroscopy (EIS) of the running fuel cell (FC) was also performed. As a result, it was found that the addition of CNTs sensibly improves single cell performances.
引用
收藏
页码:270 / 277
页数:8
相关论文
共 23 条
[1]   Effects of the cathode gas diffusion layer characteristics on the performance of polymer electrolyte fuel cells [J].
Antolini, E ;
Passos, RR ;
Ticianelli, EA .
JOURNAL OF APPLIED ELECTROCHEMISTRY, 2002, 32 (04) :383-388
[2]  
Barsoukov E, 2005, IMPEDANCE SPECTROSCOPY: THEORY, EXPERIMENT, AND APPLICATIONS, 2ND EDITION, pXII
[3]   DMFC electrode preparation, performance and proton conductivity measurements [J].
Birry, L. ;
Bock, C. ;
Xue, X. ;
McMillan, R. ;
MacDougall, B. .
JOURNAL OF APPLIED ELECTROCHEMISTRY, 2009, 39 (03) :347-360
[4]   PEM fuel cell testing by electrochemical impedance spectroscopy [J].
Brunetto, Carmelo ;
Moschetto, Antonino ;
Tina, Giuseppe .
ELECTRIC POWER SYSTEMS RESEARCH, 2009, 79 (01) :17-26
[5]   Flow visualisation experiments in a blade coating process [J].
Davard, F ;
Dupuis, D .
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS, 2000, 93 (01) :17-28
[6]   Effect of membrane characteristics and humidification conditions on the impedance response of polymer electrolyte fuel cells [J].
Freire, TJP ;
Gonzalez, ER .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2001, 503 (1-2) :57-68
[7]   Highly Stable Pd-Based Catalytic Nanoarchitectures for Low Temperature Fuel Cells [J].
Hu, F. P. ;
Shen, P. K. ;
Li, Y. L. ;
Liang, J. Y. ;
Wu, J. ;
Bao, Q. L. ;
Li, C. M. ;
Wei, Z. D. .
FUEL CELLS, 2008, 8 (06) :429-435
[8]   Effect of PTFE content on the performance of a Direct Methanol fuel cell [J].
Krishnamurthy, Balaji ;
Deepalochani, S. .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2009, 34 (01) :446-452
[9]   Development of novel self-humidifying composite membranes for fuel cells [J].
Liu, FQ ;
Yi, BL ;
Xing, DM ;
Yu, JR ;
Hou, ZJ ;
Fu, YZ .
JOURNAL OF POWER SOURCES, 2003, 124 (01) :81-89
[10]   Preparation of high performance Pt/CNT catalysts stabilized by ethylenediaminetetraacetic acid disodium salt [J].
Liu, J.-M. ;
Meng, H. ;
Li, J.-I. ;
Liao, S.-J. ;
Bu, J.-H. .
FUEL CELLS, 2007, 7 (05) :402-407