Nano Archive

Improved fullerene nanofiber electrodes used in direct methanol fuel cells

Wang, Q and Zhang, Y and Miyazawa, K and Kato, R and Hotta, K and Wakahara, T (2009) Improved fullerene nanofiber electrodes used in direct methanol fuel cells. Journal of Physics: Conference Series, 159 (1). 012023.

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Platinum supported on fullerene nanofibers as possible electrodes for direct methanol fuel cells (DMFC) were studied. Fullerene nanofiber with 20 wt% Pt loading was mixed with 5 wt% Nafion solution. The mixture paste was coated on Nafion 117 membrane and sandwiched with silicon plates. To increase the surface reaction area of catalyst, nanoimprint was used to fabricate micro-patterns in the Nafion proton exchange membrane. Nanoimprint pattern consisted of dots of 500 nm-in-diameter, 140 nm-in-depth and 1 μm-in-spacing. The nanoimprint of the treated proton exchange membrane (PEM) was carried out in a desktop thermal nanoimprint system (NI273, Nano Craft Tech. Corp., Japan) at the optimized conditions of 130 °C and pressure of 3 MPa for 6 min. Then the Pt-coated PEM was sandwiched with micro-channelled silicon plates to form a micro-DMFC. With passively feeding of 1 M methanol solution and air at room temperature, the as-prepared cell had the open circuit voltage of 0.34 V and the maximum power density of 0.30 mW/cm 2 . Compared with a fresh cell, the results shows that nanofibers used in nanoimprinted PEM have an improvement on the performance of micro fuel cells.

Item Type:Article
ID Code:11368
Deposited By:Prof. Alexey Ivanov
Deposited On:02 Nov 2011 00:15
Last Modified:02 Nov 2011 00:47

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