孔隙率分布对质子交换膜燃料电池性能的影响
Effect of porosity distribution on performance of proton exchange membrane fuel cells
殷宇捷 1孙峰 2苏丹丹 1秦帅昌 1聂旭亮 1庞彬1
作者信息
- 1. 河北大学 质量技术监督学院,河北 保定 071002;河北省新能源汽车动力系统轻量化技术创新中心,河北 保定 071002
- 2. 北京科技大学 新材料技术研究院,北京 100080
- 折叠
摘要
建立平行、蛇形及叶脉流场的三维质子交换膜燃料电池(PEMFC)模型,分析不同模型中催化层(CL)的氧气分布特征.针对不同流场模型提出对应的气体扩散层(GDL)孔隙率梯度分布方案,分析不同流场模型中氧气摩尔分数分布、膜电流密度分布、极化曲线与功率密度曲线.结果表明,所提GDL孔隙率梯度分布方案能够强化氧气由GDL向CL的传输效果,改善CL上局部氧气供应不足现象,提升PEMFC输出性能.与常规孔隙率分布的平行、蛇形及叶脉流场模型相比,采用孔隙率梯度分布的流场模型的峰值功率密度分别提高了8.59%,18.26%和15.46%.
Abstract
The three-dimensional models of proton exchange membrane fuel cell(PEMFC)with parallel,serpentine and leaf vein flow fields were established,and the oxygen distribution characteristics of catalytic layer(CL)in different models were analyzed.The corresponding porosity gradient distribution schemes in gas diffusion layer(GDL)were proposed for different flow models.The oxygen molar fraction distribution,membrane current density distribution,polarization curve and power density curve in different flow field models were analyzed.Results show that the proposed porosity gradient distribution scheme can effectively enhance the oxygen transfer from GDL to CL,improve the local oxygen supply deficiency of CL,and enhance the output performance of PEMFC.Compared with the parallel,serpentine and leaf vein flow field models of the conventional porosity distribution,the peak power density of the flow field model using the porosity gradient distribution increased by 8.59％,18.26％and 15.46％,respectively.
关键词
质子交换膜燃料电池(PEMFC)/流场/气体扩散层/孔隙率/催化层Key words
proton exchange membrane fuel cell(PEMFC)/flow field/gas diffusion layer/porosity/catalytic layer引用本文复制引用
基金项目
国家自然科学基金(51902081)
河北省自然科学基金(E2021201032)
保定市科技计划(2074P019)
河北大学高层次人才科研启动基金(521100222037)
出版年
2024
NETL
NSTL
万方数据