High performance polyvinylidene fluoride/graphite/multi-walled carbon nanotubes composite bipolar plate for PEMFC with segregated conductive networks

Hu, Bin; Chang, Fu-Lu; Liu, Xiang; He, Guangjian; Cao, Xianwu; Yin, Xianze

doi:10.1016/j.ijhydene.2021.05.081

Cited by 53 publications

(23 citation statements)

References 62 publications

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“…For C-CBPs, the conductive effect of agglomerated CNTs was weakened, so the improvement was not as good as that of I-CBPs. As the content of CNTs increased, more and more CNTs were difficult to be wetted, which also had a negative effect on ASR [ 56 ]. On the other hand, molded composites often have an enriched layer of resin on the surface due to extrusion [ 57 ], which is extremely detrimental to ASR.…”

Section: Resultsmentioning

confidence: 99%

Improved Performance of Composite Bipolar Plates for PEMFC Modified by Homogeneously Dispersed Multi-Walled Carbon Nanotube Networks Prepared by In Situ Chemical Deposition

Xie

Qiu

et al. 2023

Nanomaterials

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Composite bipolar plates with excellent performance play a crucial role in improving the overall performance of proton-exchange-membrane fuel cells. However, for graphite/resin composite bipolar plates, their electrical conductivity and mechanical properties are often too complex to meet the needs of users at the same time. Although nanoconductive fillers can alleviate this problem, the performance improvement for composite bipolar plates is often limited due to problems such as agglomeration. In this study, a uniformly dispersed multi-walled carbon nanotube network was prepared by in situ vapor deposition on the surface and pores of expanded graphite, which effectively avoided the problem of agglomeration and effectively improved the various properties of the composite BPs through the synergistic effect with graphite. With the addition of 2% in situ deposited carbon nanotubes, the modified composite bipolar plate has the best conductivity (334.53 S/cm) and flexural strength (50.24 MPa), and all the properties can meet the DOE requirements in 2025. Using the in situ deposition of carbon nanotubes to modify composite bipolar plates is a feasible route because it can result in multi-walled carbon nanotubes in large quantities and avoid the agglomeration phenomenon caused by adding nanofillers. It can also significantly improve the performance of composite bipolar plates, achieving the high performance of composite bipolar plates at a lower cost.

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Section: Resultsmentioning

confidence: 99%

Improved Performance of Composite Bipolar Plates for PEMFC Modified by Homogeneously Dispersed Multi-Walled Carbon Nanotube Networks Prepared by In Situ Chemical Deposition

Xie

Qiu

et al. 2023

Nanomaterials

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“…The electrical conductivity and flexural strength of 28.83 S/cm and 24.92 MPa were attained with 80 wt% Ti 3 SiC 2 content, fabricated at 10 MPa mold pressure for 10 min. Hu et al [ 128 ] prepared PVDF/graphite/MWCNTs composite BP with a segregated conductive network. The components were blended in an electric pulverizer in three steps and finally the mixtures were compressing molded at 10 MPa and 190°C for 10 min.…”

Section: Polymer Composite Materials For Bipolar Platesmentioning

confidence: 99%

A comprehensive review of current research on various materials used for developing composite bipolar plates in polymer electrolyte membrane fuel cells

2022

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Polymer electrolyte membrane fuel cells or proton exchange membrane fuel cells (PEMFC) is a clean, reliable, and efficient power source, especially in fuel cell electric vehicles for converting chemical energy stored in hydrogen and oxygen directly into electrical energy. Bipolar plates (BP) are vital components in PEMFC since they contribute significantly to fuel cells weight, volume, and cost. Traditionally BP was fabricated from high-density graphite material. However, the drawbacks of graphite plates like high volume, weight, and difficulty in machining lead to research in developing alternative materials for BP. Metals and composite materials have attracted attention as alternative materials in recent studies. Composite BP was preferred more due to corrosion problems and expensive coating requirements of metallic plates. This article presents a comprehensive review of current research on various materials used for developing polymer composite BP. The properties of polymer composite BP made of traditional and recently developed thermosetting or thermoplastic resins reinforced with conductive carbon-based fillers like expanded graphite, carbon black, carbon fiber, carbon nanotube and graphene are discussed. The challenges and future research trends on materials and processes for developing composite BP are also proposed.

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“…3 The feasibility of using thermoplastic resins for manufacturing bipolar plates has been investigated in the literature. [22][23][24] The performance of the composite bipolar plates mainly depends on the filler type, concentration, and chemical compatibility with the polymer matrix. High filler loading elevates the electrical conductivity but significantly decreases the mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

Synergistic enrichment of electrically conductive polypropylene‐graphite composites for fuel cell bipolar plates

Tariq

Utkarsh

Syed

et al. 2022

Intl J of Energy Research

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Summary In this research study, electrically conductive Polypropylene (PP) based composites were developed using twin‐screw extrusion technique with the objective of investigating the effects of primary and binary fillers on the overall electrical performance of the composites with relation to their mechanical properties. Thermoplastic polymers are suitable for a wide variety of applications due to their inherent characteristics, such as low density, ease of processibility, and recyclability. The addition of conductive fillers to thermoplastic resins reduces the material's resistivity and provides the ability to conduct heat and electricity, making them an excellent candidate for the manufacturing of fuel cell bipolar plates. The first part of this research study consists of studying the effect of graphite content on the electrical and mechanical properties of PP composites, whereas the second part focuses on the analysis of the effects of a multi‐filler composite system consisting of Multi‐Walled Carbon Nanotubes (MWCNT) and Carbon Black (CB) in the graphite‐PP composites. The experimental results revealed that the maximum electrical conductivity obtained from the binary filler composites is up to 127% higher compared to that of the single filler composites. The addition of binary fillers also improved the flexural strength of the composites. This experimental study constitutes new prospects in the development of electrically conductive thermoplastic composites with sound mechanical properties for fuel cell bipolar plates.

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High performance polyvinylidene fluoride/graphite/multi-walled carbon nanotubes composite bipolar plate for PEMFC with segregated conductive networks

Cited by 53 publications

References 62 publications

Improved Performance of Composite Bipolar Plates for PEMFC Modified by Homogeneously Dispersed Multi-Walled Carbon Nanotube Networks Prepared by In Situ Chemical Deposition

Improved Performance of Composite Bipolar Plates for PEMFC Modified by Homogeneously Dispersed Multi-Walled Carbon Nanotube Networks Prepared by In Situ Chemical Deposition

A comprehensive review of current research on various materials used for developing composite bipolar plates in polymer electrolyte membrane fuel cells

Synergistic enrichment of electrically conductive polypropylene‐graphite composites for fuel cell bipolar plates

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