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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

Effects of carbon fillers on the thermal conductivity of highly filled liquid-crystal polymer based resins

Author(s): Jason M. Keith, Julia A. King, Rachel M. Pagel, Rebecca A. Hauser

Carbon/liquid-crystal polymer composites were formulated. Composites containing one of three types of carbon filler, composites containing two types of carbon filler, and composites containing all three types of carbon ...

Keywords: Fillers, fuel cell, graphite, Guarded Heat Flow meter Method, Hydrogen, In-Plane Thermal Conductivity, liquid crystal polymer, Polymer composites, resin, Through-Plane Thermal Conductivity, Transient Plane Source Technique

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

Study of heat transfer and kinetics parameters influencing the design of heat exchangers for hydrogen storage in high-pressure metal hydrides

Author(s): Issam Mudawar, Milan Visaria, Sudarshan Kumar, Timothee Pourpoint

The development of hydrogen storage materials for use in light-duty vehicles is investigated in this paper, which is still a ways off until commercial use. High-pressure metal hydrides (HPMH) are ...

Keywords: Activation Energy, density, Enthalpy of Formation, Entropy, fuel cell, Heat Exchangers, High-Pressure Metal Hydrides, High-Pressure Metal Hydrides (HPMH), HPMH, Hydrogen Storage Materials, NDC, Non-Dimensional Conductance, Non-Dimensional Conductance (NDC), porosity, pressure, Specific Heat, Temperature, Thermal Conductivity, TPS Technique, Transient Plane Source, 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 of carbon fiber/liquid crystal polymer composites

Author(s): Amanda M. Tomson, Jason M. Keith, Julia A. King, Michael G. Miller

Two different types of polyacrylonitrile carbon fibers (Fortafil 243 and Panex 30) were added to thermoplastic matrix (Vectra A950RX Liquid Crystal Polymer) in order to generate carbon fiber/liquid-crystal polymer composites. ...

Keywords: anisotropic, Bipolar Plates, Carbon Fiber, Carbon Fiber/Liquid Crystal, Fillers, fuel cell, Hot Disk Thermal Constants Analyzer, In-Plane Thermal Conductivity, Liquid Crystal, Polyacrylonitrile Carbon Fibers, Polymer composites, Through-Plane Thermal Conductivity, Volume Fractions, Volume Percent

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