Effect of small-sized conductive filler on the properties of an epoxy composite for a bipolar plate in a PEMFC

Hendra Suherman, Jaafar Sahari, Abu Bakar Sulong

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

This paper focused on using a conductive polymer composite (CPC) as a potential replacement for the conventional graphite bipolar plate used in polymer electrolyte membrane fuel cells (PEMFC). Based on the requirements established by the US Department of Energy (DOE), the in-plane electrical conductivity and flexural strength are required to be greater than 100 S/cm and 25 MPa, respectively. The high filler loading is needed to satisfy the high in-plane electrical conductivity. However, the high filler loading reduces the flexural strength and manufacturability of the composite. In this study, the composites were prepared by compounding using an internal mixer followed by compression moulding. The combination of 10 vol% carbon black (CB) as the second filler with synthetic graphite/epoxy (SG/EP) resulted in the following composite properties: 150 S/cm (in-plane conductivity), 55 S/cm (through-plane conductivity), and 38.8 MPa (flexural strength). Used as the second filler, the CB, which had a small-sized diameter, formed conductive networks that filled the voids between the SG and polymer matrix. The in-plane electrical conductivity and flexural strength of the CB/SG/EP composites at the optimum composition exceeded the requirement for bipolar plate applications.

Original languageEnglish
Pages (from-to)7159-7166
Number of pages8
JournalCeramics International
Volume39
Issue number6
DOIs
Publication statusPublished - Aug 2013

Fingerprint

Proton exchange membrane fuel cells (PEMFC)
Soot
Bending strength
Fillers
Carbon black
Artificial graphite
Composite materials
Graphite epoxy composites
Compression molding
Graphite
Polymer matrix
Polymers
Chemical analysis
Electric Conductivity

Keywords

  • Carbon black
  • Conductive polymer composites
  • Internal mixer
  • PEMFC
  • Small-sized filler

ASJC Scopus subject areas

  • Ceramics and Composites
  • Process Chemistry and Technology
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Effect of small-sized conductive filler on the properties of an epoxy composite for a bipolar plate in a PEMFC. / Suherman, Hendra; Sahari, Jaafar; Sulong, Abu Bakar.

In: Ceramics International, Vol. 39, No. 6, 08.2013, p. 7159-7166.

Research output: Contribution to journalArticle

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