RuO_2·nH_2O对质子交换膜燃料电池动态响应的影响  

Effect of RuO_2·nH_2O on the Dynamic Response of Polymer Electrolyte Membrane Fuel Cells

作　　者：孙昕[1] 徐洪峰[1] 潘欢欢[1] 张伟[1] 

机构地区：[1]大连交通大学环境与化学工程学院,大连116028

出　　处：《机械工程学报》2009年第2期48-50,共3页Journal of Mechanical Engineering

基　　金：国家自然科学基金资助项目(20776023)

摘　　要：为了改善质子交换膜燃料电池在作为移动动力源时的动态响应,提出一种在质子交换膜燃料电池中引入RuO2·nH2O的方法,使质子交换膜燃料电池具备了超级电容器功能。首先以溶胶-凝胶法合成了RuO2·nH2O水溶胶,以提拉法将Nafion膜表面附上一层RuO2·nH2O;将此膜制成膜电极,通过对电极的循环伏安测试和对电池的稳态性能测试的结果证明了RuO2·nH2O的加入没有影响Pt的活性,对电池的稳态性能没有负面影响;通过对电极作多电位电势阶跃计时电流测试和脉冲电流下的电压响应测试,结果显示了RuO2·nH2O作为电容材料加入到质子交换膜燃料电池的膜电极中,在电池瞬间加载时可以缓冲电池电压大幅度衰减的现象,起到了改善电池动态响应的作用。To improve the dynamic response of polymer electrolyte membrane fuel cell （PEMFC） when it is used as mobile power source, a method to introduce RuO2·nH2O into the PEMFC is proposed, so that the PEMFC is provided with the function of super capacitor. Firstly, hydrous ruthenium dioxide （RuO2·nH2O） is prepared by using sol-gel method. A layer of RuO2·nH2O is adhered on Nation membrane surface by using czochralski method. This membrane is made into membrane electrode. Test on the cyclic voltammetry of electrode and test on the steady state performance of cell are carried out. The test results prove that the adding of RuO2·nH2O does not influence the activeness of Pt and has no negative effect on the steady state performance of cell. Tests on dynamic response of voltage in different current and multi-potential steps chronoamperomertry show that RuO2·nH2O as capacitive material added into the membrane electrode of PEMFC can buffer great voltage attenuation of cell at instantaneous loading.

关 键 词：RuO2·nH2O溶胶 质子交换膜燃料电池 动态响应 

分 类 号：O646.21[理学—物理化学]