摘要
研究了以乙烷作为燃料、掺杂了H3PO4的聚苯并咪唑(PBI)材料作为质子传导膜、Pt/C作为电极催化剂构成的燃料电池电化学性能。采用溶液铸造法制备了PBI/H3PO4质子传导膜,考察了在PBI膜中H3PO4的掺杂量与时间的关系及乙烷气体在增湿和不增湿条件下PBI/H3PO4燃料电池的电化学性能;探讨了电池的反应机理及不同操作温度对电池性能的影响。结果表明,PBI膜H3PO4适宜的掺杂时间为8h,电解质中掺杂600mol%H3PO4;乙烷气体增湿后,电池性能变好;操作温度提高,电化学反应速率加快,电池的输出电流与功率密度增加。结构为C2H6,(Pt/C阳极)/PBI/H3PO4膜/(Pt/C阴极),O2的单电池,在200℃和0.1Mpa、乙烷气体的湿度从0增加到0.02kgH2O/kg乙烷时,电池的最大输出电流密度从1.5mA·cm-2增加到34mA·cm-2,最大功率密度从0.33mW·cm-2增加到5.5mW·cm-2。
Performance of fuel cell using ethane as fuel, polybenzimidazole （PBI） membrane doping H3PO4 as proton-conducting membrane, Pt/C as electrode catalysts was investigated. Proton conducting membrane of PBI/ H3PO4 was prepared by solution casting method. Relation of H3PO4 doped amount in PBI membrane and doped time was observed. Electrochemical performances of PBI/H3PO4 proton-conducting membrane fuel cell were compared under the conditions with ethane humidification or without ethane humidification. Reaction mechanism of fuel cell and effect of different operation temperatures on fuel cell performance were explored. The experimental results showed that H3PO4 doped amount in PBI membrane and doped time were 600mol% H3PO4 and 8h, respectively. Cell performance became better after ethane humidification. Output current and power densities of cell increased with increasing operational temperature. This is attributed to improved reaction rate of electrodes. The maximum current and power densities of 1.5mA· cm^-2 and 0.33 mW· cm^-2 at ethane humidity of 0, and of 34 mA· cm^-2 and 5.5 mW· cm^-2 at ethane humidity of 0.02 kg H2O/kg ethane, for the single fuel cell having the configuration of C2H6 （Pt/C anode）/PBI/H3PO4 membrane/（Pt/C cathode）, O2 were obtained at 200 ℃ and 0.1 MPa, respectively
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2010年第1期132-137,共6页
Chinese Journal of Inorganic Chemistry
基金
广东省自然科学基金项目(No.9152902001000005)资助
