Study on carbon matrix composite bipolar plates with balance of conductivity and flexural strength

In order to balance the conductivity and flexural strength of graphite composite bipolar plates, the in-fluence of conductive filler on the properties of graphite composite bipolar plate was comprehensively studied by using phenolic resin as binder, natural flake graphite as conductive substrate and functional carbon materials with different structures as auxiliary filler. The results show that the particle size of conductive substrate has an important influence on the conductivity enhancement of auxiliary filler. The influence of conductive particle size on auxiliary filler electrical conductivity improvement was first in-vestigated in this research. The effects of various auxiliary filler concentrations on improving electrical conductivity and flexural strength were then examined. This research has substantial implications for the balance of electrical conductivity and flexural strength of graphite composite bipolar plates.(c) 2023 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.

Automated summary

This study comprehensively investigated the influence of conductive filler on the properties of graphite composite bipolar plates in order to balance conductivity and flexural strength. Phenolic resin was used as the binder, natural flake graphite as the conductive substrate, and different functional carbon materials as auxiliary fillers. The results showed that the particle size of the conductive substrate significantly affected the conductivity enhancement of the auxiliary filler. Furthermore, the effects of various auxiliary filler concentrations on improving electrical conductivity and flexural strength were examined. This research has significant implications for achieving a balance between electrical conductivity and flexural strength in graphite composite bipolar plates.