复合材料双极板配方优化研究

Study on the formular optimization of the composite bipolar plate

将碳纤维(CF)、碳纳米管(CNT)、乙炔黑(AB)和炭黑(CB)等导电材料与丙烯腈-丁二烯-苯乙烯(ABS)塑料混合,压制成复合材料导电双极板基体,再在两侧覆盖铅箔,得到双极板。观察基体成型后的外观,并测试导电性能。正交实验确定复合材料双极板的优化配方为:m(ABS)∶m(CF)∶m(CNT)∶m(AB)∶m(CB)=100∶1∶0.5∶6∶8。以此配方制作的24 V、10 Ah双极性铅酸电池与传统单极电池相比,内阻低28%,以0.5 Ca放电,比能量高15%左右。

The conductive composite bipolar substrates were prepared by mixing acrylonitrile butadiene styrene（ABS） powder with conductive materials of carbon fiber （ CF ）, carbon nanotubes （ CNT ）, acetylene black （ AB ） and carbon black （ CB ） in certain proportions according to an orthogonal experiment. The bipolar plates were made of these bipolar substrates after they were molded in pressure and covered with lead foils at its both sides. Judged from bipolar plates＇ formation and conductivity, the optimized formular was m（ABS） ： m（CF） ： m（CNT） ： m（AB） ： m（CB） = 100： 1： 0. 5： 6： 8. A 24 V, 10 Ah bipolar lead-acid battery sample was made by using the optimized ratio. Compared with the traditional ones, the internal resistance was less than 28%, the specific energy was higher than 15% at the discharge rate of 0. 5 Ca.