摘要
针对新型抗水淹电极(AFE)质子交换膜燃料电池(PEMFC),通过均相模型描述催化层结构,建立了阴阳极板、流道、扩散层、催化层和质子交换膜的完整PEMFC模型。提出了描述新型抗水淹电极质子交换膜燃料电池的数学模型,用液态水饱和度分布和抗水淹电极内二甲基硅油含量来修正反应气体有效扩散系数和电化学反应速率方程,模拟液态水堵塞传质通道和淹没电极有效面积的影响。试验和模拟计算都反映出抗水淹电极提高了高电流密度输出时的电池性能,应用仿真模型预测了催化层内DMS含量对电池性能的影响。
The paper established a model tbr anti-flooding electrode （AFE） proton exchange membrane fuel cells （PEMFC）, which contains anode and cathode collectors, the gas channel, the gas diffusion layer, the electrolyte membrane and catalyst layer. Among them, the catalysis layer is described by a homogeneous model. A new mathematical description of AFE PEMFC model was proposed. Water saturation distribution and dimethyl silicon oil （DMS） content were used to revise gas active diffusion coefficient and the electrochemical reaction rate equation and to simulate liquid water blocking mass transport channel and submerging electrode active surface. Both experimental and numerical simulation proved that the anti-flooding electrode improved cell performance in high current density output. The PEMFC model predicted cell performance with different DMS content.
出处
《汽车工程学报》
2012年第6期407-416,共10页
Chinese Journal of Automotive Engineering
基金
国家科技部"863计划"项目(2007AA05Z124)
关键词
质子交换膜燃料电池
数值模拟
两相流
水传递
proton exchange membrane fuel celll
transport numerical simulation
two-phase flow
water
