摘要
聚合物电解质膜燃料电池(PEMFC)的微孔层对电池性能有重要影响。首次使用多壁碳纳米管(MWCNTs)在碳纸上先制备1层微孔层,再用碳黑(CB)在其上制备第2层微孔层,形成双层微孔层。从不同尺度上观察了微孔层(MPL)的形貌和结构,测量了气体扩散层(GDL)垂直向电阻,并测试了电池性能。结果表明,双层微孔层的平整程度与单独使用碳黑制备的微孔层相似,比单独使用MWCNTs制备的微孔层更加平整;双层微孔层的GDL垂直向的电阻比单层微孔层的GDL更小;使用双层微孔层制备的膜电极比相同碳载量下的单层微孔层制备的膜电极性能更好。
The microporous layers（ MPLs） in a polymer electrolyte membrane fuel cell（ PEMFC） impact its performance markedly. For the first time,a double-layered microporous layer consisting multi-walled carbon nanotubes（ MWCNTs） and carbon black is proposed and fabricated to obtain a better gas diffusion layer（ GDL） in PEMFC. The first MWCNTs layer is coated on a carbon paper,followed by coating the second carbon black layer on top of the first MWCNTs layer. The surface morphology was observed under different magnification. The through-plane resistance of the GDL and fuel cell performance were measured. The smoothness of the double-layered MPL appeared to be better than that of the MWCNTs MPL and to be similar to that of the carbon black MPL. The GDL with the double-layered MPL had a lower through-plane resistance than that with either one-layered MPL. The PEMFC with the double-layered MPLs showed a better performance than that with single-layered MPLs under the same carbon material loading.
作者
冷小辉
王宇新
Leng Xiaohui Wang Yuxin(School of Chemical Engineer/ng and Technology, Tianjin University, State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science and Desalination Technology,Tianjin 300072,Chin)
出处
《化学工业与工程》
CAS
CSCD
2017年第1期47-52,共6页
Chemical Industry and Engineering
