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Issue 20, 2011
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Polybenzimidazole membranes modified with polyelectrolyte-functionalized multiwalled carbon nanotubes for proton exchange membrane fuel cells

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Abstract

Nafion- and polybenzimidazole (PBI)-functionalized multiwalled carbon nanotubes (MWCNT–Nafion and MWCNT–PBI) have been prepared through an ozone mediated process and used as additives in the preparation of PBI/MWCNT nanocomposite membranes. Scanning electron microscopy images of the nanocomposite membranes show a high compatibility between functionalized-MWCNTs and the PBI matrix. Addition of the functionalized MWCNTs enhances the thermal and mechanical properties of the composite membranes. Moreover, compared to the proton conductivity of 0.03 S cm−1 of the phosphoric acid (PA)-doped PBI membrane, the PA-doped nanocomposite membranes containing 0.2 wt% of MWCNT–Nafion (N-0.2) and MWCNT–PBI (P-0.2) have proton conductivities of 0.05 and 0.08 S cm−1 at 160 °C under anhydrous conditions, respectively. In single cell tests at 150 °C, N-0.2 and P-0.2 demonstrated maximum power densities of 700 and 600 mW cm−2, respectively. The values are much higher than that found with pristine PBI membrane (530 mW cm−2).

Graphical abstract: Polybenzimidazole membranes modified with polyelectrolyte-functionalized multiwalled carbon nanotubes for proton exchange membrane fuel cells

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Publication details

The article was received on 28 Jan 2011, accepted on 22 Mar 2011 and first published on 15 Apr 2011


Article type: Paper
DOI: 10.1039/C1JM10439J
J. Mater. Chem., 2011,21, 7480-7486

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    Polybenzimidazole membranes modified with polyelectrolyte-functionalized multiwalled carbon nanotubes for proton exchange membrane fuel cells

    Suryani, C. Chang, Y. Liu and Y. M. Lee, J. Mater. Chem., 2011, 21, 7480
    DOI: 10.1039/C1JM10439J

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