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Structural design and analysis of a passive DMFC supplied with concentrated methanol solution

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  • Fang, Shuo
  • Zhang, Yufeng
  • Zou, Yuezhang
  • Sang, Shengtian
  • Liu, Xiaowei

Abstract

This paper develops a passive direct methanol fuel cell (DMFC) structure employing the graphite plate as the porous medium in order to increase the energy density and the stable operating time of the cell. A two-dimensional model of the proposed DMFC is developed to determine the appropriate thickness of the graphite plate and the optimum feed concentration of the methanol. The simulated polarization curves and current-power profiles of the model are verified experimentally. Both the modeling results and the experimental results show that the 500 μm thick graphite plate cannot transfer enough methanol to the anode. The simulated and experimental results both illuminate that the DMFC with 300 μm thick graphite plate supplied with 10 M methanol and the one with 400 μm thick graphite plate supplied with 15 M methanol can achieve a normal performance. The energy density of the proposed DMFC is also analyzed by discharging at constant current experimentally. The DMFC with 400 μm thick graphite plate supplied with 15 M methanol has the longest discharging time. The proposed passive DMFC structure significantly improves the energy density and electrical efficiency of the cell.

Suggested Citation

  • Fang, Shuo & Zhang, Yufeng & Zou, Yuezhang & Sang, Shengtian & Liu, Xiaowei, 2017. "Structural design and analysis of a passive DMFC supplied with concentrated methanol solution," Energy, Elsevier, vol. 128(C), pages 50-61.
    • Handle: RePEc:eee:energy:v:128:y:2017:i:c:p:50-61
    DOI: 10.1016/j.energy.2017.03.161
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    2. Hao, Wenbin & Ma, Hongyan & Sun, Guoxing & Li, Zongjin, 2019. "Magnesia phosphate cement composite bipolar plates for passive type direct methanol fuel cells," Energy, Elsevier, vol. 168(C), pages 80-87.
    3. Fang, Shuo & Liu, Yuntao & Zhao, Chunhui & Huang, Lilian & Zhong, Zhi & Wang, Yun, 2021. "Polarization analysis of a micro direct methanol fuel cell stack based on Debye-Hückel ionic atmosphere theory," Energy, Elsevier, vol. 222(C).
    4. Qinwen Yang & Gang Xiao & Tao Liu & Bin Gao & Shujun Chen, 2022. "Efficient Prediction of Fuel Cell Performance Using Global Modeling Method," Energies, MDPI, vol. 15(22), pages 1-14, November.
    5. Fang, Shuo & Song, Nan & Liu, Yuntao & Zhou, Chaoyang & Zhao, Chunhui & Wang, Yun, 2023. "Oscillator design for high efficiency DC-DC of micro direct methanol fuel cell," Energy, Elsevier, vol. 284(C).
    6. Wang, Luwen & Yuan, Zhaoxia & Wen, Fei & Cheng, Yuhua & Zhang, Yufeng & Wang, Gaofeng, 2018. "A bipolar passive DMFC stack for portable applications," Energy, Elsevier, vol. 144(C), pages 587-593.
    7. Abdelkareem, Mohammad Ali & Sayed, Enas Taha & Nakagawa, Nobuyoshi, 2020. "Significance of diffusion layers on the performance of liquid and vapor feed passive direct methanol fuel cells," Energy, Elsevier, vol. 209(C).
    8. Sang-Sun Park & Na-Young Shin & Chanmin Lee & Yukwon Jeon & Won Seok Chi & Yong-Gun Shul, 2021. "Au Coated Printed Circuit Board Current Collectors Using a Pulse Electroplating Method for Fuel Cell Applications," Energies, MDPI, vol. 14(16), pages 1-10, August.

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