Corrosion and thermal stability of multi-walled carbon nanotube–graphite–acrylonitrile–butadiene–styrene composite bipolar plates for polymer electrolyte membrane fuel cells

Abstract

h i g h l i g h t s < Development of ABSegraphiteeMWNT composite bipolar plates. < EIS successfully applies for understanding the corrosion mechanism of the composites. < MWNT concentration strongly affects the corrosion behavior of the ABSegraphite composites. < The best balance of properties was for the ABS-graphite composite with addition of 2 wt.% MWNT. a b s t r a c tComposite bipolar plates based on the proper mixing of multi-walled carbon nanotubes (MWNTs), synthetic graphite particles and acrylonitrileebutadieneestyrene (ABS) powder have been produced by hot compression molding. The corrosion properties of the molded plates were assessed through electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization curves. Through-plane and in-plane electrical conductivities were determined. The relevance of electrochemical oxidation to the electrical conductivity of the composites was assessed by cyclic voltammetry. Thermal stability of the composites was examined by thermogravimetric analysis (TGA). The morphology of fractured surfaces of the plates was observed by scanning electron microscopy. The incorporation of MWNTs increased the inplane and through-plane electrical conductivity of the ABSegraphite composites. There was, though, a corresponding reduction of the corrosion resistance. The thermal behavior was little affected by the addition of MWNTs.

Design of magnesium phosphate cement based composite for high performance bipolar plate of fuel cells

“…For the MPC based composite, acrylonitrile butadiene styrene co-polymer (ABS) net was examined for its effectiveness as a macro-reinforcement to improve the exural strength. 23 In order to meet the target exural strength of US DOE 2015, surface-rough ABS nets were produced through 3D printing and employed as a macroreinforcement for the MPC based composite, as shown in Fig. 5a.…”

“…13,14 It is a common sense in composite BP that as the electrical conductivity increases the corrosion resistance is expected to reduce. 23 The correct balance between these two properties is a central point to guarantee the long term stability of the composite BP. Fig.…”

Effect of Thermo-oxidation on the Mechanical Performance of Polymer Based Composites for High Temperature Applications

“…Vi-POSS enhanced the thermal stability of PDMS [23]. Composite bipolar plates based on the proper mixing of multi-walled carbon nanotubes (MWNTs), synthetic graphite particles and acrylonitrile-butadiene-styrene (ABS) powder have been produced by hot compression molding [24]. Thermal stability of the composites was examined by thermogravimetric analysis (TGA).…”

“…Thermal stability of the composites was examined by thermogravimetric analysis (TGA). The thermal behavior was little affected by the addition of MWNTs [24]. New rigid polypropylene composite foams filled with high amounts of flame-retardant systems based on synthetic hydromagnesite, a basic magnesium carbonate obtained from an industrial by-product were developed.…”

Performance of an HT‐PEMFC having a catalyst with graphene and multiwalled carbon nanotube support

“…Therefore, new support materials have been investigated to enhance the durability and performance of the catalysts. In general, the support materials can be carbon based (eg, activated carbon, graphene [G], graphene nanoplatelets [GNPs], single‐walled carbon nanotubes [SWCNTs], and multiwalled carbon nanotubes [MWCNTs]) or noncarbon based (eg, indium oxide, conductive polymers, titanium, and alumina) . Because of the high thermal and electrical conductivity, chemical stability, surface area, and mechanical durability of MWCNT and GNP, which are carbon‐based support materials, their usage is widespread.…”