燃料电池自增湿膜电极的制备及其性能研究  

Preparation of self-humidifying membrane electrode assembly for fuel cell and performance study

作　　者：黎杰鑫 邹家明 侯三英 朱春霞 廖开发 乔文雄 彭海宁 杜可杰[1] 刘黎 LI Jie-xin;ZOU Jia-ming;HOU San-ying;ZHU Chun-xia;LIAO Kai-fa;QIAO Wen-xiong;PENG Hai-ning;DU Ke-jie;LIU Li(School of Chemistry and Chemical Engineering,University of South China,Hengyang 421001,China)

机构地区：[1]南华大学化学化工学院,湖南衡阳421001

出　　处：《现代化工》2020年第5期143-147,共5页Modern Chemical Industry

基　　金：湖南省教育厅青年项目(18B275);南华大学研究性学习和创新性实验计划校级项目(2018XJXZ333)。

摘　　要：通过向阳极催化层中添加高分子化合物亲水剂,制备了一种具有自增湿能力的膜电极。考察了亲水性高分子化合物的种类、相对湿度(RH)以及电池温度对膜电极自增湿性能的影响,并初步探索了膜电极的自增湿机理。结果表明,以羧甲基纤维素(CMC)为保水剂的膜电极表现出最好的低湿度性能;膜电极的自增湿性能受相对湿度影响不大,但随着温度的升高,其性能先升高后降低;在电池温度为60℃、20%RH、206 k Pa条件下,以羧甲基纤维素为保水剂的膜电极在0.6 V的电流密度为900 m A/cm^2,是空白膜电极的1.8倍。A self-humidifying membrane electrode assembly(MEA)is successfully prepared through adding hydrophilic macromolecular compound into the catalyst layer of anode.The effects of the variety of hydrophilic macromolecular compound,relative humidity(RH)and cell temperature on the self-humidifying performance of the MEA are investigated,and its self-humidifying mechanism is explored primarily.The results show that the self-humidifying MEA prepared by using carboxymethyl cellulose(CMC)as hygroscopic agent exhibits the best low humidity performance;RH has little influence on MEA’s self-humidifying performance.The current density of CMC-containing MEA can reach 900 m A·cm^-2 at 0.6 V,1.8 times that of blank MEA when RH is 20%,the temperature and pressure of the cell is 60℃and 206 KPa,respectively.

关 键 词：燃料电池 增湿 电化学 低湿度 高分子化合物 

分 类 号：TH3[机械工程—机械制造及自动化]