膨胀石墨/聚酰亚胺复合材料双极板的制备研究  

Preparation of expanded graphite/polyimide composite bipolar plates

作　　者：常丰瑞 黄俭标 刘金玲[2,3] 杨代军[2,3] 马建新[1,2,3] 

机构地区：[1]华东理工大学资源与环境学院,上海200237 [2]同济大学新能源汽车工程中心,上海201804 [3]同济大学汽车学院,上海201804

出　　处：《化工新型材料》2015年第5期65-67,85,共4页New Chemical Materials

基　　金：国家科技部863项目(2012AA110501);科技支撑项目(2013BAG15B00);汉高基金教席

摘　　要：以膨胀石墨(EG)为导电填料,聚酰亚胺(PI)树脂为粘结剂,使用干法混合工艺和模压成型工艺制备质子交换膜燃料电池(PEMFC)用复合材料双极板。采用差示扫描量热法(DSC)确定PI的软化和固化温度。研究了混合时间、模压工艺条件、配料比等对复合材料双极板性能的影响。结果表明配料的混合时间以10min为宜;最佳模压工艺条件为110℃预热0.5h,然后恒温加压至80MPa,模压10min后升温至226℃,恒温固化2h;最适配比为60%EG+40%PI。上述研究结果可为膨胀石墨/聚酰亚胺复合材料双极板的中试及规模化生产提供理论依据。Composite bipolar plates for proton exchange membrane fuel cell（PEMFC）were prepared using expanded graphite（EG） as primary conductivity filler and polyimide resin（PI）as matrix by dry mixing and compression molding process. Differential scanning calorimetry（DSC）was used to determine the PI softening and curing temperatures. Effects of mixing time,molding process, and the ratio between EG and PI on the properties of bipolar plates were studied. The results showed that the appropriate mixing time was 10 min. The best conditions {or the molding process were preheating l10℃ for 0.5 h,then compressing at 80 MPa for 10 min while holding the temperature at 110℃ ,following by curing at temperature of 226℃ for 2 h. The optimum ratio of the ingredients was 60% EG and 40% PI. The present work may provide a theoreti- cal basis for the pilot-scale manufacture and mass production of expanded graphite / polyimide composite bipolar plate.

关 键 词：干法混合 膨胀石墨 聚酰亚胺 复合材料双极板 

分 类 号：TB332[一般工业技术—材料科学与工程] TM911.4[电气工程—电力电子与电力传动]