The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform
John Newman - One of the best experts on this subject based on the ideXlab platform.
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water and thermal management in Solid Polymer electrolyte fuel cells
Journal of The Electrochemical Society, 1993Co-Authors: Thomas F Fuller, John NewmanAbstract:A mathematical model of transport in a Solid‐Polymer‐electrolyte fuel cell is presented. A two‐dimensional membrane‐electrode assembly is considered. Water management, thermal management, and utilization of fuel are examined in detail. Because the equilibrium sorption of water between the gas phase and the Polymer‐electrolyte depends strongly on temperature, water and thermal management are interrelated. The rate of heat removal is shown to be a critical parameter in the operation of these fuel cells.
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Water and Thermal Management in Solid‐Polymer‐Electrolyte Fuel Cells
Journal of The Electrochemical Society, 1993Co-Authors: Thomas F Fuller, John NewmanAbstract:A mathematical model of transport in a Solid-Polymer-electrolyte fuel cell is presented. A two-dimensional membrane-electrode assembly is considered. Water management, thermal management, and utilization of fuel are examined in detail. Because the equilibrium sorption of water between the gas phase and the Polymer-electrolyte depends strongly on temperature, water and thermal management are interrelated. The rate of heat removal is shown to be a critical parameter in the operation of these fuel cells.
Thomas F Fuller - One of the best experts on this subject based on the ideXlab platform.
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water and thermal management in Solid Polymer electrolyte fuel cells
Journal of The Electrochemical Society, 1993Co-Authors: Thomas F Fuller, John NewmanAbstract:A mathematical model of transport in a Solid‐Polymer‐electrolyte fuel cell is presented. A two‐dimensional membrane‐electrode assembly is considered. Water management, thermal management, and utilization of fuel are examined in detail. Because the equilibrium sorption of water between the gas phase and the Polymer‐electrolyte depends strongly on temperature, water and thermal management are interrelated. The rate of heat removal is shown to be a critical parameter in the operation of these fuel cells.
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Water and Thermal Management in Solid‐Polymer‐Electrolyte Fuel Cells
Journal of The Electrochemical Society, 1993Co-Authors: Thomas F Fuller, John NewmanAbstract:A mathematical model of transport in a Solid-Polymer-electrolyte fuel cell is presented. A two-dimensional membrane-electrode assembly is considered. Water management, thermal management, and utilization of fuel are examined in detail. Because the equilibrium sorption of water between the gas phase and the Polymer-electrolyte depends strongly on temperature, water and thermal management are interrelated. The rate of heat removal is shown to be a critical parameter in the operation of these fuel cells.
Jeanfrancois Fauvarque - One of the best experts on this subject based on the ideXlab platform.
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electrochemical properties of an alkaline Solid Polymer electrolyte based on p ech co eo
Electrochimica Acta, 2000Co-Authors: N Vassal, E Salmon, Jeanfrancois FauvarqueAbstract:Elastomers consisting of a coPolymer of epichlorohydrin and ethylene oxide were studied as Solid Polymer electrolytes in Polymer/KOH systems. This alkaline Solid Polymer electrolyte exhibits a high ionic conductivity at room temperature, typically 10−3 S cm−1, as measured by electrochemical impedance spectroscopy. Moreover, it exhibits a good anionic transference number, namely 0.93, as determined by a technique derived from the Hittorf method. The potential stability window (0.9 V) has been determined by cyclic voltammetry. Initial tests concerning a nickel/metal hydride secondary battery and a zinc/air primary cell, containing this Solid Polymer electrolyte, show good performance of these systems in such electrolyte, at different temperatures.
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nickel metal hydride secondary batteries using an alkaline Solid Polymer electrolyte
Journal of The Electrochemical Society, 1999Co-Authors: N Vassal, E Salmon, Jeanfrancois FauvarqueAbstract:Sealed alkaline Solid Polymer electrolyte nickel/metal hydride laboratory cells have been constructed and tested to evaluate their properties. Studies of the cycle life, self-discharge, and behavior of cells at different temperatures were carried out. The first results on the electrochemical behavior of an alkaline Solid Polymer electrolyte [based on poly(ethylene oxide), potassium hydroxide, and water] medium are presented here and show good reversibility of this all-Solid-state system for more than 500 cycles, without significant loss of capacity and with a reasonable average discharge efficiency (close to 80%). The temperature-dependence study allowed the determination of optimum operating conditions between 0 and 40 C. Characteristics of the Solid Polymer electrolyte based Ni/MH cells are compared to those of several other rechargeable battery systems.
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nickel metal hydride secondary batteries using an alkaline Solid Polymer electrolyte
Journal of The Electrochemical Society, 1999Co-Authors: N Vassal, E Salmon, Jeanfrancois FauvarqueAbstract:Sealed alkaline Solid Polymer electrolyte nickel/metal hydride laboratory cells have been constructed and tested to evaluate their properties. Studies of the cycle life, self‐discharge, and behavior of cells at different temperatures were carried out. The first results on the electrochemical behavior of an alkaline Solid Polymer electrolyte [based on poly(ethylene oxide), potassium hydroxide, and water] medium are presented here and show good reversibility of this all‐Solid‐state system for more than 500 cycles, without significant loss of capacity and with a reasonable average discharge efficiency (close to 80%). The temperature‐dependence study allowed the deremination of optimum operating conditions berween 0 and 40°C. Characteristics of the Solid Polymer electrolyte based Ni/MH cells are compared to those of several other rechargeable battery systems. © 1999 The Electrochemical Society. All rights reserved.
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Nickel/Metal Hydride Secondary Batteries Using an Alkaline Solid Polymer Electrolyte
Journal of The Electrochemical Society, 1999Co-Authors: N Vassal, E Salmon, Jeanfrancois FauvarqueAbstract:Sealed alkaline Solid Polymer electrolyte nickel/metal hydride laboratory cells have been constructed and tested to evaluate their properties. Studies of the cycle life, self‐discharge, and behavior of cells at different temperatures were carried out. The first results on the electrochemical behavior of an alkaline Solid Polymer electrolyte [based on poly(ethylene oxide), potassium hydroxide, and water] medium are presented here and show good reversibility of this all‐Solid‐state system for more than 500 cycles, without significant loss of capacity and with a reasonable average discharge efficiency (close to 80%). The temperature‐dependence study allowed the deremination of optimum operating conditions berween 0 and 40°C. Characteristics of the Solid Polymer electrolyte based Ni/MH cells are compared to those of several other rechargeable battery systems. © 1999 The Electrochemical Society. All rights reserved.
Nasa - One of the best experts on this subject based on the ideXlab platform.
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Solid Polymer Electrolyte (SPE) fuel cell technology, program review, phase 2
2013Co-Authors: NasaAbstract:The purpose of the Solid Polymer electrolyte (SPE) fuel cell program is to advance the SPE fuel cell technology in four target areas. These areas are: (1) reduced fuel cell costs; (2) reduced fuel cell weight; (3) improved fuel cell efficiency; and (4) increased systems compatibility.
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Solid Polymer electrolyte (SPE) fuel cell technology program, phase 1/1A
2013Co-Authors: NasaAbstract:A Solid Polymer electrolyte fuel cell was studied for the purpose of improving the characteristics of the technology. Several facets were evaluated, namely: (1) reduced fuel cell costs; (2) reduced fuel cell weight; (3) improved fuel cell efficiency; and (4) increased systems compatibility. Demonstrated advances were incorporated into a full scale hardware design. A single cell unit was fabricated. A substantial degree of success was demonstrated.
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Solid Polymer membrane program
2013Co-Authors: NasaAbstract:The results are presented for a Solid Polymer electrolyte fuel cell development program. Failure mechanism was identified and resolution of the mechanism experienced in small stack testing was demonstrated. The effect included laboratory analysis and evaluation of a matrix of configurations and operational variables for effects on the degree of hydrogen fluoride released from the cell and on the degree of blistering/delamination occurring in the reactant inlet areas of the cell and to correlate these conditions with cell life capabilities. The laboratory evaluation tests were run at conditions intended to accelerate the degradation of the Solid Polymer electrolyte in order to obtain relative evaluations as quick as possible. Evaluation of the resolutions for the identified failure mechanism in space shuttle configuration cell assemblies was achieved with the fabrication and life testing of two small stack buildups of four cell assemblies and eight cells each.
Daniel Brandell - One of the best experts on this subject based on the ideXlab platform.
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mechanically stable uv crosslinked polyester polycarbonate Solid Polymer electrolyte for high temperature batteries
Batteries & Supercaps, 2020Co-Authors: Isabell L Johansson, Daniel Brandell, Jonas MindemarkAbstract:Due to the mechanism with which Solid Polymer electrolytes use to conduct ions, these materials are generally more suitable for high-temperature applications where the ionic conductivity is suffici ...
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Polyketones as Host Materials for Solid Polymer Electrolytes
Journal of The Electrochemical Society, 2020Co-Authors: Therese Eriksson, Daniel Brandell, Mace Amber, Yumehiro Manabe, Masahiro Yoshizawa-fujita, Yasuhide Inokuma, Jonas MindemarkAbstract:While Solid Polymer electrolytes (SPEs) have great potential for use in future lithium-based batteries, they do, however, not display conductivity at a sufficient level as compared to liquid electr ...
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Solid Polymer electrolyte coating from a bifunctional monomer for three dimensional microbattery applications
Journal of Power Sources, 2013Co-Authors: Bing Sun, Iying Liao, Semra Tan, Tim Bowden, Daniel BrandellAbstract:This work comprises the synthesis and characterization of a novel Solid Polymer electrolyte based on oligomeric polyetheramine substituted with a methacrylic group at one of its three chain ends. T ...
