摘要：

采用溶液插层复合法成功地制备了以聚丙烯（PP）和马来酸酐接枝聚丙烯（g-PP）为基体材料、鳞片石墨（GP）为导电填料的全钒氧化还原液流电池（VRB）导电双极板。用四探针法、动电位、恒电位、循环伏安及交流阻抗考察了复合双极板的导电性、耐腐蚀性及电化学性能。实验结果表明：g-PP的加入可以使GP均匀地分散到高分子基体中，显著提高了导电填料与高分子基体之间的相容性，复合双极板的电导率为43.7 S·cm^-1，1.2 V下的腐蚀电流为1.9×10^-3  A

关键词: 全钒液流电池, 双极板, 循环伏安, 交流阻抗

Abstract:

With the method of solution intercalation, bipolar plate for all-vanadium redox flow battery was successfully developed by using PP and g-PP as polymer matrix and flake graphite as conductive filler.Four probes method, potentiodynamic experiments, potentiostatic experiments, cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS) were explored to investigate the conductivity, corrosion resistance and electrochemical performance of bipolar plate.The results showed that g-PP made flake graphite uniformly dispersed in the polymer matrix, which significantly improved compatibility between the conductive filler and the polymer matrix.The conductivity of bipolar plate was 43.7 S·cm^-1.When the voltage was 1.2 V, the corrosion current was 1.9×10^-3 A·cm^-2.The prepared bipolar plate could meet the requirements of all vanadium flow battery.

Key words: 全钒液流电池, 双极板, 循环伏安, 交流阻抗