The optical properties of the fullerenated poly(epoxy propyl carbazole)(PEPC)have been investigated.Compared with pure PEPC,fullerenated PEPC has the same structure in the UV region of the absorption spectrum,and exte...The optical properties of the fullerenated poly(epoxy propyl carbazole)(PEPC)have been investigated.Compared with pure PEPC,fullerenated PEPC has the same structure in the UV region of the absorption spectrum,and extends the active range to a longer wavelength.The apparent quenching of PEPC fluorescence was observed in the fullerenated polymer and it can be attributed to intramolecular excited state energy transfer.展开更多
Different types of ABPBI (poly(2,5-benzimidazole)) membranes and polymer binders were evaluated to investigate the performance of MEAs for high temperature proton exchange membrane fuel cell (HT-PEMFC). The properties...Different types of ABPBI (poly(2,5-benzimidazole)) membranes and polymer binders were evaluated to investigate the performance of MEAs for high temperature proton exchange membrane fuel cell (HT-PEMFC). The properties of the prepared MEAs were evaluated and analyzed by polarization curve, electrochemistry impedance spectroscopy (EIS), cyclic voltammetry (CV) and durability test. The results showed that MEA with modified ABPBI membrane (AM) has satisfactory performance and durability for fuel cell application. Compare to conventional PBI or Nafion binders, polytetrafluoroethylene (PTFE) and polyvinylidene difluoride (PVDF) are more attractive as binders in the catalyst layer (CL) of gas diffusion electrode (GDE) for HT-PEMFC.展开更多
基金supported by the Natural Science Foundation of China(grant number 29573119)the Zhejiang Provincial Natural Science Foundation of China(grant number 297009)the Special Doctoral Program Funds of the State Education Commission of China(grant number97033510).
文摘The optical properties of the fullerenated poly(epoxy propyl carbazole)(PEPC)have been investigated.Compared with pure PEPC,fullerenated PEPC has the same structure in the UV region of the absorption spectrum,and extends the active range to a longer wavelength.The apparent quenching of PEPC fluorescence was observed in the fullerenated polymer and it can be attributed to intramolecular excited state energy transfer.
文摘Different types of ABPBI (poly(2,5-benzimidazole)) membranes and polymer binders were evaluated to investigate the performance of MEAs for high temperature proton exchange membrane fuel cell (HT-PEMFC). The properties of the prepared MEAs were evaluated and analyzed by polarization curve, electrochemistry impedance spectroscopy (EIS), cyclic voltammetry (CV) and durability test. The results showed that MEA with modified ABPBI membrane (AM) has satisfactory performance and durability for fuel cell application. Compare to conventional PBI or Nafion binders, polytetrafluoroethylene (PTFE) and polyvinylidene difluoride (PVDF) are more attractive as binders in the catalyst layer (CL) of gas diffusion electrode (GDE) for HT-PEMFC.
