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Research Papers

Effect of PTFE Content and Sintering Temperature on the Properties of a Fuel Cell Electrode Backing Layer

[+] Author and Article Information
D. Rohendi

Fuel Cell Institute,
Universiti Kebangsaan Malaysia,
Bangi, Selangor DE 43600, Malaysia;
Faculty of Mathematics and Sciences,
Department of Chemistry,
Sriwijaya University,
Inderalaya 30662, Indonesia
e-mail: rohendi19@gmail.com

E. H. Majlan

Fuel Cell Institute,
Universiti Kebangsaan Malaysia,
Bangi, Selangor DE 43600, Malaysia
e-mail: edy@ukm.my

A. B. Mohamad, W. R. W. Daud

Fuel Cell Institute,
Universiti Kebangsaan Malaysia,
Bangi, Selangor DE 43600, Malaysia;
Faculty of Engineering and Built Environment,
Department of Chemical and
Process Engineering,
Universiti Kebangsaan Malaysia,
Bangi, Selangor DE 43600, Malaysia

A. A. H. Kadhum

Fuel Cell Institute,
Universiti Kebangsaan Malaysia,
Bangi, Selangor DE 43600, Malaysia;
Faculty of Engineering and Built Environment,
Department of Chemical and
Process Engineering,
Universiti Kebangsaan Malaysia,
Bangi, Selangor DE 43600, Malaysia

L. K. Shyuan

Fuel Cell Institute,
Universiti Kebangsaan Malaysia,
Bangi, Selangor DE 43600, Malaysia

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY. Manuscript received February 7, 2013; final manuscript received February 13, 2014; published online March 13, 2014. Assoc. Editor: Abel Hernandez-Guerrero.

J. Fuel Cell Sci. Technol 11(4), 041003 (Mar 13, 2014) (6 pages) Paper No: FC-13-1017; doi: 10.1115/1.4026932 History: Received February 07, 2013; Revised February 13, 2014

The effects of the polytetrafluoroethylene (PTFE) content and sintering temperature on the properties of a fuel cell electrode backing layer are studied in this work. Characterization of the electrical conductivity, hydrophobicity, and surface structure of the backing layer is carried out for various PTFE content values (15–45 wt. %) and sintering temperatures (175–400 °C). The results showed that, generally, the electrical conductivity of the backing layer surface decreased whereas the hydrophobicity increased as the PTFE content and the sintering temperature increased. Based on the observations made via scanning electron microscope (SEM) analysis and testing of the electrical conductivity and hydrophobicity, the PTFE content should not exceed 35 wt. %, and the best sintering temperature was 350 °C.

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References

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Figures

Grahic Jump Location
Fig. 1

Electrical conductivity of the surface of the backing layer at various PTFE content (wt. %)

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Fig. 2

Electrical conductivity of the surface of backing layer in the direction of 0 deg and 90 deg, respectively, to the top and bottom of the backing layer at various PTFE content

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Fig. 3

Water droplets on carbon paper with the various contents of PTFE based on observations of ordinary cameras (inset picture from contact angle meter)

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Fig. 4

SEM images of backing layer at various PTFE content: (a) 0 wt. % (carbon paper Avcarb P75 PCS (Ballard)), (b) 15 wt. %, (c) 25 wt. %, (d) 35 wt. %, (e) 45 wt. % (inset, magnification 20,000×)

Grahic Jump Location
Fig. 5

The level of conductivity and hydrophobicity of the backing layer at various sintering temperatures

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Fig. 6

Electrical conductivity of backing layer in the direction of 0 deg and 90 deg, respectively, to the top and bottom of the backing layer at various sintering temperatures

Grahic Jump Location
Fig. 7

Water droplets on the backing layer at various temperatures sintering (°C) based on observations of ordinary cameras (inset picture from contact angle meter)

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Fig. 8

SEM images of backing layer at various sintering temperatures

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