微流燃料电池阴极物质传输的数学模型研究  

Study of mathematical model of cathode material transport in microfluidic fuel cell

作　　者：乔海英 杨贺菊[2] QIAO Haiying;YANG Heju(Hebei Open University,Shijiazhuang Hebei 050080,China;Hebei University of Science and Technology,Shijiazhuang Hebei 050018,China)

机构地区：[1]河北开放大学,河北石家庄050080 [2]河北科技大学,河北石家庄050018

出　　处：《电源技术》2022年第1期59-62,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金委科学研究项目(11871191)。

摘　　要：对微流燃料电池阴极内相关物质的传输性能进行研究,通过对阴极扩散层进行模型重构,得到其扩散系数及渗透率。通过建立电池阴极边界处的二维模型,得到了孔隙率大小、过电位高低对组分的浓度分布和反应速度的影响。研究表明,利用Buggeman公式计算得到的氧气扩散系数偏高,电池阴极物质的传输快慢受扩散层孔隙的影响较大,当孔隙率降低时会增大传输阻力,使得氧气的浓度和反应速度同时下降,也使水蒸气的浓度上升。The transport performance of related substances in the cathode of microfluidic fuel cell was studied,and the diffusion coefficient and permeability were obtained by reconstructing the model of cathode diffusion layer.By establishing a two-dimensional model of the cathode boundary,the effects of porosity and overpotential on the concentration distribution and reaction speed were obtained.The results show that the oxygen diffusion coefficient calculated by buggman formula is high,and the transport speed of cathode material is greatly affected by the porosity of diffusion layer.When the porosity decreases,the transport resistance will increase,the oxygen concentration and reaction speed will decrease at the same time,and the vapor concentration will increase.

关 键 词：微型燃料电池 孔隙率 物质传输 阴极 

分 类 号：TM911[电气工程—电力电子与电力传动]