二氧化氮毒化对直接甲醇燃料电池性能的影响  

Influence of nitrogen dioxide on the performance of direct methanol fuel cells

作　　者：李想 秦斌 肖文杰 杨慧民 LI Xiang;QIN Bin;XIAO Wen-jie;YANG Hui-min(People's Liberation Army Navy 701 Factory,Beijing 100015,China;Dalian Institute of Chemical Physics,Chinese Academy of Science,Dalian Liaoning 116023,China)

机构地区：[1]中国人民解放军海军701工厂,北京100015 [2]中国科学院大连化学物理研究所,辽宁大连116023

出　　处：《电源技术》2020年第11期1614-1615,1625,共3页Chinese Journal of Power Sources

摘　　要：直接甲醇燃料电池阴极氧化剂为空气中的氧气,空气中少量氮氧化物对电池有毒化作用。考察了恒流放电运行模式下二氧化氮对电池性能的影响,利用循环伏安扫描和电化学阻抗谱分析NO2毒化作用机制。研究表明,电池阴极催化剂Pt表面存在少量NO2吸附,对电化学活性比表面积及氧还原反应电荷转移电阻造成一定影响,导致电池恒流运行中电池电压加速衰减。The direct methanol fuel cell(DMFC)cathode oxidant is oxygen in the ambient air,but small amounts of nitrogen oxide in the air can poison the batteries.In this paper,the effect of nitrogen dioxide on the performance of battery was investigated,and the mechanism of NO2 poisoning was researched by cyclic voltammetry and electrochemical impedance spectroscopy.Studies have shown that there is a small amount of NO2 adsorption on the surface of the cathode catalyst Pt,which has certain influence on the electrochemical activity specific surface area and the charge transfer resistance of the oxygen reduction reaction,resulting in accelerated decay of the voltage during constant current operation of the DMFC.

关 键 词：直接甲醇燃料电池 二氧化氮 吸附 

分 类 号：TM911.4[电气工程—电力电子与电力传动]