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Thermal and electrical conductivity enhancement of graphite nanoplatelets on form-stable polyethylene glycol/polymethyl methacrylate composite phase change materials

Author(s): Jiaoqun Zhu, Jun Wang, Lei Zhang, Weibing Zhou, Yan Wang

Graphite nano-platelets (GnPs) were dispersed in polyethylene glycol (PEG)/polymethyl methacrylate (PMMA) to form a PEG/PMMA/GnPs composite organic form-stable phase change material. The effects of the incorporation of ...

Keywords: Compressive Strength, differential scanning calorimeter, Differential scanning calorimeter (DSC), DSC, Electrical Conductivity, FE-SEM, Field Emission Scanning Electron Microscopy, Field Emission Scanning Electron Microscopy (FE-SEM), Fourier-Transform Infrared Spectroscopy, Fourier-Transform Infrared Spectroscopy (FT-IR), FT-IR, graphite, pcms, phase change materials, Polymer composites, Thermal Conductivity, thermal constant analyzer, Thermogravimetry, transient plane source method, X-ray Diffraction, X-ray diffraction (XRD), XRD

Synergistic Effects and Modeling of Thermally Conductive Resins for Fuel Cell Bipolar Plate Applications

Author(s): Rebecca A. Hauser

Conductive carbon fillers (carbon black, carbon fiber, and synthetic graphite particles) were added to Vectra A950RX liquid crystal polymer and the axial and radial thermal conductivities were determined experimentally ...

Keywords: Axial Thermal Conductivity, density, Environmental Scanning Electron Microscopy, Fillers, fuel cell, graphite, Hydrogen, Polymer composites, Solvent Digestion, Specific Heat, Surface Energy Test Method, Transverse Thermal Conductivity, X-Ray Photoelectric Spectroscopy

Microthermal sensors for determining fluid composition and flow rate in fluidic systems

Author(s): A. Schutze, B. Schmitt, C. Kiefer

The use of hot disk sensors for the determination of content ratio in binary mixtures of fluids was investigated. The sensors were manufactured with various layouts of metal foil encapsulated ...

Keywords: fuel cell, Therma; Heat Storage, Thermal Conductivity, Thermal Heat Storage, TPS Technique, Transient Plane Source, Transient plane source (TPS) method

Experimental and numerical study on thermal conductivity of proton exchange membrane

Author(s): Hu Zhang, Lei Chen, Li Zhong-Zhen, Wen-Quan Tao, Ya-Ling He

Proton exchange membranes (PEM) are important components of proton exchange membrane fuel cells (PEMFC) which could potentially substitute fossil energy. The purpose of this study was to theoretically and experimentally ...

Keywords: 2500 S, Cell structure, Hot Disk, Hot Disk TPS 2500 S, Materials Studio (MS) software, molecular dynamics calculation model, Nafion 117, proton exchange membrane, Proton exchange membranes, Temperature, Thermal Conductivity, Transient plane source (TPS), Transient plane source (TPS) method, Water content

Advancement of system designs and key engineering technologies for materials-based hydrogen storage

Author(s): Bart A. van Hassel, I. Fedchenia, J. Holowczak, M. Gorbounov, R. Brown, X. Tang

Aspects of hydrogen distribution systems need improvement for their applications in fuel cell vehicles. In this paper, chemical and physical characteristics of the H2 storage material, sodium aluminum hydride (SAH), ...

Keywords: characterization, Desorption cycles, Expanded natural graphite (ENG), graphite, H2 absorption, Heat exchange, Hot Disk, Kinetic limit, Pellets, Sodium aluminum hydride (SAH), Temperature, Thermal Conductivity, Thermal integration, Thermocouples, Transient plane source (TPS), Transient plane source (TPS) method

Direct measurement of through-plane thermal conductivity of partially saturated fuel cell diffusion media

Author(s): Guoqing Xu

This thesis looked at the relationship between thermal conductivity and compression and saturation in three different fuel cell diffusion media (DM). The stress-strain relationship of the materials was investigated using ...

Keywords: Compressive Loading, Electrical Conductivity, fuel cell, Hot Disk Thermal Constants Analyzer, Optical Microscope, PEFCs, Permeability, Polymer electrolyte, porosity, Thermal Conductivity, thickness

Synergistic Effects of Carbon Fillers in Thermally Conductive Liquid Crystal Polymer Based Resins

Author(s): Amanda M. Tomson, Isabel M. Wescoat, Jason M. Keith, Julia A. King, Rebecca A. Hauser

Three different carbons (carbon black, synthetic graphite particles and carbon fiber) were added to Vectra A950RX Liquid Crystal Polymer in order to synthesize different composites for use in fuel ...

Keywords: anisotropic, Bipolar Plates, Fillers, fuel cell, graphite, Hot Disk Thermal Constants Analyzer, In-Plane Thermal Conductivity, Polymer composites, resin, Through-Plane Thermal Conductivity

Thermal conductivity models for carbon/liquid crystal polymer composites

Author(s): Bridget Zimny, Jason M. Keith, Julia A. King, Kara M. Lenhart

Various polyacrylonitrile carbon fillers (Ketjenblack carbon black, Thermocarb synthetic graphite, Fortafil 243 carbon fiber, and Panex 30 carbon fiber) were added to a thermoplastic matrix in the hopes of generating a thermally ...

Keywords: Fillers, fuel cell, graphite, Hot Disk Thermal Constants Analyzer, In-Plane Thermal Conductivity, LCPs, Liquid-Crystalline Polymers, Liquid-Crystalline Polymers (LCPs), Nielsen Model, Polyacrylonitrile Carbon, Polymer composites, resin, Thermoplastic Matrix, Through-Plane Thermal Conductivity

Electrical and thermal conductivities of novel metal mesh hybrid polymer composite bipolar plates for proton exchange membrane fuel cells

Author(s): Min-Chien Hsiao

A novel technique was used in this research article, to introduce a hybrid mesh to a polymer composite within bipolar plates, for proton exchange membrane fuel cells (PEMFCs). The mesh ...

Keywords: aluminum, Bipolar plate, Bipolar Plates, Carbon nanotubes, CNTs, Copper, current, density, Electrical Conductivity, fuel cell, Fuel cells, graphite, Hybrid, in plane, Metal mesh, modified multi-walled carbon nanotubes, modified multi-walled carbon nanotubes (MWCNTs), MWCNTs, polarization curves, Polymer composites, powder, power, Proton exchange, Thermal Conductivity, Transport propereties

Effects of carbon fillers in thermally conductive polypropylene based resins

Author(s): B. A. Johnson, C. J. Ciarkowski, J. A. King, M. D. Via

Researchers have determined the potential of increasing the thermal conductivity of insulating polymers by adding conductive fillers. One common application this may be used for, is fuel cell bipolar plates. ...

Keywords: black carbon, Carbon nanotubes, cell bipolar plates, CNTs, conductive, Fillers, fractorial design, fuel, fuel cell, graphite, insulating polymers, Polymer composites, polypropylene, resin, synthetic graphite particles, Thermal Conductivity

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