Modification of cathode structure by introduction of CNT for air-breathing DMFC

被引：45

作者：

Reshetenko, Tatyana V. ^{[1
]}

Kim, Hee-Tak ^{[1
]}

Kweon, Ho-Jin ^{[1
]}

机构：

[1] Samsung SDI Co Ltd, Suwon 443391, Gyeonggi, South Korea

来源：

ELECTROCHIMICA ACTA | 2008年 / 53卷 / 07期

关键词：

direct methanol fuel cell; MEA; pore structure; cathode; CNT;

D O I：

10.1016/j.electacta.2007.11.021

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Optimization of the structure and texture of the cathode catalyst layer for air-breathing DMFC has been studied. Application of carbon nanotubes (CNT) as an additive to the cathode catalyst layer resulted in the increase of BET surface area and porosity of the catalyst layer due to filamentous morphology of CNT. Best performance was observed at the intermediate CNT/catalyst ratio of 0.05. I-U polarization and impedance analysis indicated that the faster oxygen reduction reaction at the open cathode is responsible for the power density improvement. Excessive cathode porosity was not favorable due to the decrease of the effective ionic conductivity of the catalyst layer. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：3043 / 3049

页数：7

共 48 条

[1] Surface characterisation of IrO2/TiO2/CeO2 oxide electrodes and Faradaic impedance investigation of the oxygen evolution reaction from alkaline solution [J].

Alves, VA ;

da Silva, LA ;

Boodts, JFC .

ELECTROCHIMICA ACTA, 1998, 44 (8-9) :1525-1534

[2]

Aricò AS, 2001, FUEL CELLS, V1, P133

[3] Analysis of the electrochemical characteristics of a direct methanol fuel cell based on a Pt-Ru/C anode catalyst [J].

Arico, AS ;

Creti, P ;

Kim, H ;

Mantegna, R ;

Giordano, N ;

Antonucci, V .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (12) :3950-3959

[4] Nafion-TiO2 composite DMFC membranes:: physico-chemical properties of the filler versus electrochemical performance [J].

Baglio, V ;

Aricò, AS ;

Di Blasi, A ;

Antonucci, V ;

Antonucci, PL ;

Licoccia, S ;

Traversa, E ;

Fiory, FS .

ELECTROCHIMICA ACTA, 2005, 50 (05) :1241-1246

[5] Characterization of electrode structures and the related performance of direct methanol fuel cells [J].

Chen, CY ;

Tsao, CS .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2006, 31 (03) :391-398

[6] Performance of an air-breathing direct methanol fuel cell [J].

Chen, CY ;

Yang, P .

JOURNAL OF POWER SOURCES, 2003, 123 (01) :37-42

[7] Effect of glycerol on micro/nano structures of catalyst layers in polymer electrolyte membrane fuel cells [J].

Chisaka, Mitsuharu ;

Daiguji, Hirofumi .

ELECTROCHIMICA ACTA, 2006, 51 (23) :4828-4833

[8] Dispersion and absorption in dielectrics I. Alternating current characteristics [J].

Cole, KS ;

Cole, RH .

JOURNAL OF CHEMICAL PHYSICS, 1941, 9 (04) :341-351

[9] Development of a compact 500 W class direct methanol fuel cell stack [J].

Dohle, H ;

Schmitz, H ;

Bewer, T ;

Mergel, J ;

Stolten, D .

JOURNAL OF POWER SOURCES, 2002, 106 (1-2) :313-322

[10] Electrochemical impedance of the cathode catalyst layer in polymer electrolyte fuel cells [J].

Eikerling, M ;

Kornyshev, AA .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1999, 475 (02) :107-123

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