海膽狀碳材用於直接甲醇燃料電池之放電性能探討

陳美合

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海膽狀碳材用於直接甲醇燃料電池之放電性能探討

Study on the Performance of Direct Methanol Fuel Cell with Sea Urchin-like Carbon Support.

陳美合 , Masters　　Advisor：楊明長　　

繁體中文

直接甲醇燃料電池；合金觸媒擔載量；海膽狀碳材；中孔洞碳材；碳擔體； mesoporous carbon ； carbon support ； amount of catalyst loading ； direct methanol fuel cell ； urchin like carbon.

Abstract │ Reference (83) │ Times Cited (2) │ Altmetrics

Abstract 〈TOP〉

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Direct methanol fuel cell (DMFC) was a type of power generating system that can directly transfer chemical energy to electrical energy. Considering environmental protection and energy efficiency, DMFC have great a potential in developing new type power generating system. In a DMFC system, alloy catalysts on loaded on carbon supports to prepare membrane electrode assembly (MEA). The carbon support and catalyst become two key points of the cell performance. This report used urchin-like carbon support (HMC-CNT) which was fabricated by growing carbon nano-tubes on mesoporous carbon support (HMC). The effect of the amount of alloy catalyst on carbon support, nanotube growth condition, and MEA preparation condition were investigated. A three-electrode system was applied to analyze cell performance.
    According to SEM pictures, higher growing temperature and longer time produce longer and denser carbon nanotube. Urchin-like carbon HMC-CNT(90,800), whose nanotube was grown at 800°C for 90 min, had the highest activity with a peak current density of 0.0531 mA/cm2 in cyclic voltammetric tests. The highest maximum power density of DMFC was 21.1 mW/cm2 with the best urchin-like carbon HMC-CNT(60,800). This power density was 40% higher than that without carbon nanotube and 17% higher than that with commercial ETEK.
    For MEA with carbon supports of HMC and HMC-CNT(60, 800), hot pressure of 20 kg/cm2 gave the highest maximum power density, 15.0 mW/cm2 and 21.1 mW/cm2, respectively. HMC-CNT has higher maximum power density than HMC by 40%; cell operation temperature of 90°C gave the highest maximum power density, 16.2 mW/cm2 and 23.2 mW/cm2 for HMC and HMC-CNT(60, 800). HMC-CNT has higher maximum power density than HMC by 43%.
    Based on the same platinum loading (0.6 mg Pt/cm2 for cathode and 1.2 mg Pt/cm2 for anode) but various carbon loading on MEAs, alloy content of 54 wt% in catalyst had higher maximum power density than that of 27 wt% by 30, 18, and 5% for with carbon supports of XC72, HMC and HMC-CNT(60-800). Similarly, based on the same carbon loading (2.4 mg C/cm2 for cathode and 4.8 mg C/cm2 for anode) but various platinum loading on MEAs, alloy content of 54 wt% in catalyst had higher maximum power density than that of 27 wt% by 50, 26, and 19% for with carbon supports of XC72, HMC and HMC-CNT(60-800).

Reference ( 83 ) 〈TOP〉

1. J. Larminie, A. Disk, “Fuel Cell system Explained”, John Wiley &Son, p.1 (2001).
連結：
3. J. Larminie, A. Disk, “Fuel Cell system Explained”, John Wiley &Son, p.23 (2001).
連結：
4. K. Scott, W. M. Taama, P. Argyropoulos, “Engineering Aspects of the Direct Methanol Fuel Cell System”, J. Power Sources, Vol. 79, pp. 43-59 (1999).
連結：
5. A. Biyikoglu, “Review of Proton Exchange Membrane Fuel Cell Models”, Int. J. Hydrogen Energy, Vol. 30, pp. 1181-1212 (1998).
連結：
6. U. B. Demirci, “Direct liquid-feed fuel cells: thermodynamic and environmental concerns”, J. Power sources, Vol. 169, pp. 239-246 (2007).
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Times Cited (2) 〈TOP〉

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