Effect of carbon fillers on properties of polymer composite bipolar plates of fuel cells

Lee, Joong Hee; Jang, Yun Ki; Hong, Chang Eui; Kim, Nam Hoon; Li, Peng; Lee, Hong-Ki

doi:10.1016/j.jpowsour.2009.04.029

Cited by 156 publications

(76 citation statements)

References 16 publications

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“…CB morphology is "grape-like", consisting of individual nanoparticles 34 . CNT, due its high aspect ratio, can act as conducting links between the CB particles 34,37 . In our study, we can describe the morphology as a "grape-cluster-like" 34 conductive network in which CB particles serve as grapes and CNT acts as branches.…”

Section: Simulation Of Hybrid Nanocompositesmentioning

confidence: 99%

Assessment of Percolation Threshold Simulation for Individual and Hybrid Nanocomposites of Carbon Nanotubes and Carbon Black

2017

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Modeling electrical conductivity of polymer composites with conductive fillers has great applicability to predict conductive materials behavior. In this study, the electrical behavior of simple and hybrid systems prepared from Carbon Black (CB) and Carbon Nanotubes (CNT) was studied.There have been few advances reported in the literature regarding the modeling of hybrid systems, which motivated the development of this study. More specifically, a program was developed with the intention to describe the electric percolation threshold and the effect of synergism between the conductive fillers. Simulation was performed using the Monte Carlo method and Fortran programming language, considering concentration and geometry of conductive fillers to the system in two dimensions. Finally, simulation results were compared with the experimental results and this method proved to be effective in predicting the systems percolation threshold, being an important contribution to predict material behavior, which allows reducing the number of samples to be prepared in an experimental study.

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Section: Simulation Of Hybrid Nanocompositesmentioning

confidence: 99%

Assessment of Percolation Threshold Simulation for Individual and Hybrid Nanocomposites of Carbon Nanotubes and Carbon Black

2017

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“…The surface shows a typical fracture pattern like brittle pattern in between the nanotubes. This indicates that the strong adhesion takes place in between MWCNT and epoxy resin and fractured in different planes [6]. Also, fracture surface is much rough and their crack becomes more random.…”

Section: Morphology Of Fracture Surfacementioning

confidence: 97%

“…Due to their high aspect ratio and huge surface area, CNTs have strong tendency to agglomerate, which leads to inhomogeneous dispersion in the polymer matrix. Various techniques for dispersing CNTs have been extensively investigated and compared [3][4][5][6]. However, when trying to assess CNT dispersion, researchers always find it is very difficult to judge the grade of dispersion with conventional microscopy techniques [7].…”

Section: Introductionmentioning

confidence: 99%

A Micro-Mechanical Model for Elastic Modulus of Multi-Walled Carbon Nanotube/Epoxy Resin Composites

Srivastava¹,

Singh²

2012

CMATERIALS

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Multi-walled carbon nanotube (MWCNT) powder was used as reinforcement in epoxy resin with weight percentages 0.5, 1, 2 and 3% respectively. Dispersion of MWCNTs in the epoxy resin was obtained by a three mill rolling process. Tensile strength, compressive strength and elastic modulus were obtained from load versus displacement results. A theoretical model was developed to calculate the elastic modulus and compare with the experimental results. There was a similar trend in the experimentally obtained elastic modulus and in a modified Halpin-Tsai theory. Results show that the tensile strength, compressive strength and elastic modulus of epoxy resin are increased with the increasing of percentage of MWCNT fillers. The significant improvements in tensile strength, compressive strength and elastic modulus were attributed to the excellent dispersion of MWCNT filler in the epoxy resin.

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“…Good dispersion of the conductive filler in the polymer matrix increases the conductivity network and the electrical conductivity of MWCNT/SG/epoxy nanocomposites. Evenly dispersion of conductive filler in the polymer matrix could improve network conductive path and the electrical conductivity of MWCNTs/SG/epoxy nanocomposites produced (Antunes et al 2011;Ma et al 2009;Lee et al 2009). Analysis of variance (ANOVA) error, ie 12%, show that there are no significant factors are missed in Taguchi approach.…”

Section: Nanocompositementioning

confidence: 99%

“…Some efforts were made to improve the electrical conductivity by adding a conductive material that has different size, shape, and loading concentration. Carbon based conductive filler such as carbon nanotubes (CNTs), carbon black (CB), graphite (G), carbon fibers (CF), and expanded graphite (EG) has been extensively used to improve the electrical conductivity of CPCs (Rybak et al 2010;Lee et al 2009;Antunes et al 2011). Previous work by others researchers reported the mixing parmeters with short mixing time will improve the conductive networks formation (Hu et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Optimization of Internal Mixing Parameter on the Electrical Conductivity of Multiwall Carbon Nanotubes/Synthetic Graphite/Epoxy Nanocomposites for Conductive Polymer Composites Using Taguchi Method

Irmayani¹,

Suherman²

2017

JKUKM

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Conductive polymer composites (CPCs Experiment was carried out based on orthogonal array design using these three internal mixing parameter. The results were analyzed using the signal to noise ratio (S/N) and analysis of variance (ANOVA). The percent contribution of each internal mixing parameters to the electrical conductivity of MWCNTs/SG/epoxy resin were mixing rotation (44%), mixing temperature (26%) and mixing time (18%). This was managed to reduce the number of voids and nano size particles conductive filler material (MWCNTs

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Effect of carbon fillers on properties of polymer composite bipolar plates of fuel cells

Cited by 156 publications

References 16 publications

Assessment of Percolation Threshold Simulation for Individual and Hybrid Nanocomposites of Carbon Nanotubes and Carbon Black

Assessment of Percolation Threshold Simulation for Individual and Hybrid Nanocomposites of Carbon Nanotubes and Carbon Black

A Micro-Mechanical Model for Elastic Modulus of Multi-Walled Carbon Nanotube/Epoxy Resin Composites

Optimization of Internal Mixing Parameter on the Electrical Conductivity of Multiwall Carbon Nanotubes/Synthetic Graphite/Epoxy Nanocomposites for Conductive Polymer Composites Using Taguchi Method

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