磷酸掺杂的聚苯并咪唑复合膜在高温质子交换膜燃料电池中的应用(英文)

Phosphoric Acid Doped Polybenzimidazole Composite Membranes for High Temperature Proton Exchange Membrane Fuel Cells

研制了聚苯并咪唑(PB I)的复合膜,复合膜中引入的组分包括无机质子导体磷酸氢锆(Zr(HPO4)2.nH2O,ZrP)和聚砜(PSF),以及磺化的酸型聚砜(SPSF(H))。热失重分析表明,复合膜PB I/ZrP/PSF和PB I/SPSF(H)的热稳定性可分别达400和230℃。磷酸掺杂的PB I复合膜在温度高达200℃的低湿度条件下,呈现出高质子电导率。以磷酸掺杂的PB I复合膜为电解质,在200℃常压不加湿的条件下,以氢气氧气为燃料气进行了单电池测试,其最大功率密度分别为0.34 W/cm2(PB I/ZrP/PSF(质量比80∶15∶5))和0.38 W/cm2(PB I/SPSF(0.43H))。

Polybenzimidazole （PBI） composite membranes were prepared. The introduced components included inorganic proton conductor, Zr（ HPO4 ） 2·nH2O（ZrP） together with polysulfone（PSF） and the acid form of sulfonated polysulfone（ SPSF（H） ）. Thermogravimetric analysis indicated that the composite membranes were thermal stable up to 400℃ for the PBI/ZrP/PSF system and 230℃ for the PBI/SPSF （H） system, respectively. Phosphoric acid doped PBI composite membranes exhibited a high conductivity at temperatures up to 200 ℃ under low humidity. Single cell tests with electrolytes of acid doped PBI composites were performed at 200 ℃ under atmospheric pressure and without humidification. The maximum power density of the cell with hydrogen or oxygen as the fuel gas is 0. 34 W/cm^2 for PBI/ZrP/PSF （ mass ratio 80 ： 15 ： 5 ）, and 0. 38 W/cm^2 for acid doped PBI/SPSF （ 0. 43H ）, respectively.