Transmission characteristics of cathode water in direct methanol fuel cell

JIANG Jinghui; GONG Liang; LI Yinshi

doi:10.11949/j.issn.0438-1157.20170610

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Transmission characteristics of cathode water in direct methanol fuel cell

更新时间：2025-12-10

- Transmission characteristics of cathode water in direct methanol fuel cell
- CIESC Journal Issue S1, Pages: 83-89(2017)
- 作者机构：
  
  1. 中国石油大学(华东)储运与建筑工程学院热能工程系,山东,青岛,266580
  2. 西安交通大学能源与动力工程学院, 热流科学与工程教育部重点实验室,陕西,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20170610
  CLC： K124
- Online First：31 August 2017，
  
  Published：31 August 2017
- 稿件说明：
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JIANG Jinghui, GONG Liang, LI Yinshi. Transmission characteristics of cathode water in direct methanol fuel cell[J]. CIESC Journal, 2017, (S1): 83-89.
DOI：

JIANG Jinghui, GONG Liang, LI Yinshi. Transmission characteristics of cathode water in direct methanol fuel cell[J]. CIESC Journal, 2017, (S1): 83-89. DOI： 10.11949/j.issn.0438-1157.20170610.

摘要

利用COMSOL Multiphysics软件对直接甲醇燃料电池（DMFC）阴极模型进行计算，获得压力、速度、水、氧气和液态饱和度分布情况，研究扩散层在不同物理参数（如厚度、孔隙率、孔径大小和亲憎水性）下电池阴极水和氧气的传输情况，进一步建立扩散层孔隙率梯度的数学模型，研究扩散层孔隙率梯度以及支撑层参数对直接甲醇燃料电池性能和物质传输的影响。结果表明，扩散层具有大孔隙率、薄扩散层时均有利于氧气传质，可以使电池性能提高；扩散层孔隙率梯度的存在可以减轻氧气传输阻力，提高电池性能。

Abstract

The characteristic of cathode water transport in direct methanol fuel cell was investigated using COMSOL Multiphysics

including the effect of the distribution of pressure

velocity

water

oxygen and liquid saturation

as well as diffusion layer under different physical parameters

such as thickness

porosity

size and hydrophobicity. A further mathematical model of diffusion layer with gradient porosity distribution was established to study the effect of porosity gradient and support layer parameters on cell performance and mass transfer. The results show that the diffusion layer with high porosity and thin layer is beneficial to oxygen transfer. The gradient porosity distribution of diffusion layer can reduce oxygen transport resistance

and thus improving the cell performance.

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