Synthesis and characterization of P2O5–SiO2–X (X = phosphotungstic acid) glasses as electrolyte for low temperature H2/O2 fuel cell application
Synthesis and characterization of P2O5–SiO2–X (X = phosphotungstic acid) glasses as electrolyte for low temperature H2/O2 fuel cell application
复制标题
DOI：
10.1016/j.memsci.2006.02.033
复制
发表时间：
2006-09
影响因子：
9.5
通讯作者：
T. Uma;M. Nogami
中科院分区：
文献类型：
--
作者：
T. Uma;M. Nogami
利用磷钨酸制备了一种新型的氢燃料电池质子导电玻璃膜。这些玻璃被设计为产生高质子导电性，可能是H2/ o2燃料电池中电解质的潜在替代品。结构研究证实P2O5-SiO2-PWA玻璃为非晶相。该玻璃材料具有良好的机械稳定性和热稳定性，在90℃和30% RH条件下，质子电导率最高可达9.1×10−2S/cm。采用Barrett-Joyner-Halenda （BJH）解吸法测定平均孔径小于5nm。通过极化曲线和电流-电压曲线对其电化学活性进行了研究。在30℃、30%湿度条件下，在电极和5P2O5-87SiO2-8PWA玻璃上负载0.15mg/cm2的Pt/C，获得了10.2mW/cm2的最大功率密度。
A new class of proton conducting glass membranes for hydrogen fuel cell applications are being developed using phosphotungstic acid. These glasses are being design to yield high proton conductivities could be potential substitutes for electrolytes in H2/O2fuel cell. P2O5–SiO2–PWA glasses have been non-crystalline phases confirmed by structural studies. The glass materials showed good mechanical and thermal stability, and also found a maximum proton conductivity of 9.1×10−2S/cm at 90°C and 30% RH. The average pore size less than 5nm was determined by Barrett–Joyner–Halenda (BJH) desorption method. The electrochemical activity was investigated by polarization curves and current–voltage profiles. A maximum power density value of 10.2mW/cm2was obtained using 0.15mg/cm2of Pt/C loaded on electrode and 5P2O5–87SiO2–8PWA glasses at 30°C and 30% humidity.