摘要
利用已建立的数学模型,在考察了两极极板对称布置的传统直接甲醇燃料电池几何参数影响的基础上,提出了一种两极板交错布置的新方案。对比研究了交错布置和对称布置两种方案的流场特性、电荷流动特性和化学反应分布特性,计算了该方案的催化层、扩散层和质子交换膜尺度的影响。优化尺度后,得出一个性能较优的采用交错布置方案的电池,其输出电势和极限电流密度均比传统对称布置方案提高约10%,为甲醇燃料电池的组装和优化设计提供一种新思路。
Based on the investigations on the influences of geometrical parameters and symmetrical plates disposal scheme on DMFC performance, a new scheme that staggered channels arrangement was presented and studied in this work. The characteristics of fluid flow, proton transport and reaction rate distribution were well studied and contrasted to symmetrical scheme used in a cell unit. The effects of thickness of catalyst layer, backing layer and membrane on cell local average current density were investigated. After optimized design, a staggered scheme was put forward, and the higher potential output and greater limiting current density were obtained compared to the conventional symmetrical scheme. A new way to optimizing DMFC design and assembly was put forward.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2008年第10期1247-1251,共5页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(No.50736005No.50629601)
