燃料电池双极板的制备与工作性能研究  

Fabrication and performance research on bipolar plates of fuel cells

作　　者：吴懋亮[1] 曹寿峰[1] 顾竹筠[1] 

机构地区：[1]上海电力学院,上海200090

出　　处：《电源技术》2013年第6期983-986,共4页Chinese Journal of Power Sources

基　　金：上海高校选拔培养优秀青年教师科研专项基金(Z2011-022)

摘　　要：质子交换膜燃料电池是直接将化学能转换为电能的装置,双极板是燃料电池的关键部件。研究了用来加工双极板的混合石墨材料的制备方法,通过对比,45%天然石墨、10%合成石墨、8%石墨纤维、2%炭黑和35%粘结剂的混合物作为加工材料,通过选择性激光烧结加工,并经过800℃高温焙烧和渗透树脂处理获得燃料电池双极板,具有120 S/cm电导率和40 MPa抗弯强度。实验证明混合石墨材质的双极板符合燃料电池的使用要求,但是不同流道结构影响燃料电池的输出电流-电压特性,尤其是平行流道燃料电池表现出较差的性能。不同流道形式受温度变化的影响不同,单希尔伯特流道表现最为敏感,60℃至80℃时燃料电池表现出良好的工作性能。Proton exchange membrane fuel cell converts directly electrochemical energy into electricity, and bipolar plate is a critical component. The selection and mixture method of mixed graphite were studied, and 45% nature graphite, 10% synthetic graphite, 8% graphite fiber, 2% carbon black and 35% binder were adopted to mix as material. The bipolar plates were fabricated with the mixed graphite by the selective laser sintering apparatus, which had pretty electrical conductivity of 120 S/cm and enough flexural strength of 40 MPa after carbonization at 800 ℃ and infiltration with liquid conductive resin. The experiments testify that mixed graphite is suitable to fabricate PEM fuel cell bipolar plates. Channel patterns influence fuel cell performance, parallel pattern especially express poor performance. Polarization curves of a fuel cell vary with different temperatures, and the single Hilbert channel type is more sensitive. A fuel cell obtains good performance under the temperature of 60-80 ℃.

关 键 词：质子交换膜燃料电池 双极板 流道 选择性激光烧结 石墨 

分 类 号：TM914[电气工程—电力电子与电力传动]