物理化学学报 >> 2007, Vol. 23 >> Issue (02): 187-191.doi: 10.3866/PKU.WHXB20070210

研究论文 上一篇    下一篇

含杂萘联苯结构聚合物膜的直接甲醇燃料电池性能

邓会宁;王宇新   

  1. 天津大学化工学院, 化学工程研究所, 天津 300072
  • 收稿日期:2006-08-21 修回日期:2006-09-11 发布日期:2007-02-01
  • 通讯作者: 王宇新 E-mail:yxwang@tju.edu.cn

Sulfonated Poly(phthalazinones) Membranes For Direct Methanol Fuel Cell

DENG Hui-Ning;WANG Yu-Xin   

  1. Chemical Engineering Research Center, School of Chemical Engineering and Technology,
  • Received:2006-08-21 Revised:2006-09-11 Published:2007-02-01
  • Contact: WANG Yu-Xin E-mail:yxwang@tju.edu.cn

摘要: 质子交换膜是直接甲醇燃料电池(DMFC)的关键组成部分. 通过磺化制备了磺化杂萘联苯聚醚酮(SPPEK)、磺化杂萘联苯聚醚砜(SPPES)和磺化杂萘联苯聚醚砜酮(SPPESK)三种含杂萘联苯结构的新质子交换膜, 测试了其热稳定性、质子导电性和甲醇透过性能. SPPESK的热分解温度比相近离子交换容量(IEC)的SPPEK和SPPES约低100 ℃, 三种膜均具有良好的导电和阻醇性能; 分别以三种膜为电解质组装DMFC考察了其性能, DMFC的开路电压随膜的阻醇性的提高而增大, 三种膜的开路电压均高于Nafion115膜, 但在较高电流密度的区域三种新膜的性能均比Nafion115膜差.

关键词: 杂萘联苯聚合物, 直接甲醇燃料电池, 质子交换膜, 质子电导率, 透醇性能

Abstract: Proton exchange membrane is one of the key parts of direct methanol fuel cell (DMFC). Sulfonated poly(phthalazinones) membranes were prepared and the feasibility of applying these membranes in DMFC was studied. The thermal degradation temperature of sulfonated poly(phthalazinone ether sulfone keton) (SPPESK) membrane was about 100 ℃ lower than that of sulfonated poly(phthalazinone ether keton) (SPPEK) and sulfonated poly(phthalazinone ether sulfone) (SPPES) membranes with similar ion-exchange capacity (IEC). These new membranes showed high proton conductivity and their methanol permeability was lower than that of Nafion membrane. DMFC performance of these new membranes was also investigated. The DMFCs with sulfonated poly(phthalazinones) membranes showed higher open circuit voltage than that using Nafion membrane as electrolyte. However, the DMFC performance of these new membranes was lower than that of Nafion membrane at high current density.

Key words: Poly(phthalazinones), Direct methanol fuel cell (DMFC), Proton exchange membrane (PEM), Proton conductivity, Methanol permeability