The single electrode Peltier heats of Li+/Li, H2/H− and Li+/Pd–Li couples in molten LiCl–KCl systems

“…The entropy balance for the anode reaction is expressed as follows on the basis of the local equilibrium hypothesis (6,13,14): where S an 7 and S O 2 -denote the entropies reversibly received by the anode and transported by O 2in the electrolyte, respectively. S an corresponds to the single electrode Peltier heat.…”

Section: Reversible Heat Production Rate With the Anode Entropy Balancementioning

confidence: 99%

Current Distribution Analysis of a Microtubular Solid Oxide Fuel Cell with Surface Temperature Measurements

Nakajima

Kitahara

2011

ECS Trans.

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Current distribution of a practical solid oxide fuel cell (SOFC) has been analyzed from a thermal analysis combined with surface temperature measurements. Electrochemical impedance spectroscopy with two-electrode set-up is employed on an anode-supported microtubular SOFC. This cell is an intermediate temperature SOFC composed of an Ni/(ZrO2)0.9(Y2O3)0.1 cermet anode, an La0.8Sr0.2Ga0.8Mg0.2O2.8 electrolyte, and an (La0.6Sr0.4)(Co0.2Fe0.8)O3 cathode. The impedance spectra give the resistances at the anode and cathode, and the cell Ohmic resistance. By numerically integrating these resistances, overpotentials are evaluated. The overpotentials and the single electrode (electrochemical) Peltier heats, at the anode and cathode provide individual heat production rates. Since the energy balance equations incorporating these heat production rates determined by current yield the surface temperatures of the cell, local current densities are obtained so that this calculated and measured temperatures by thermocouples at several positions in the anode and cathode surfaces coincide.

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“…The entropy balance for the anode reaction is expressed as follows on the basis of the local equilibrium hypothesis (13,14). where π an /Τ and S O 2 -denote the entropies reversibly received by the anode and transported by O 2in the electrolyte, respectively.…”

Section: Heat Production Rates With Overpotentialsmentioning

confidence: 99%

Thermal Analysis of a Microtubular Solid Oxide Fuel Cell Using Electrochemical Impedance Spectroscopy

2009

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A thermal analysis of the anode, cathode and electrolyte of a practical solid oxide fuel cell (SOFC) is performed. Electrochemical impedance spectroscopy with two-electrode set-up is employed on an anode-supported micro tubular SOFC. This cell is an intermediate temperature SOFC composed of an Ni/(ZrO2)0.9(Y2O3)0.1 cermet anode, an La0.8Sr0.2Ga0.8Mg0.2O2.8 electrolyte, and an (La0.6Sr0.4)(Co0.2Fe0.8)O3 cathode. A common equivalent circuit is applied to impedance spectra to acquire the resistances at the anode and cathode, and the cell Ohmic resistance. By numerically integrating these resistances, overpotentials are evaluated. The overpotentials and entropy balances, i.e., the single electrode Peltier heats, at the anode and cathode give individual heat production rates. By analytically integrating energy balance equations incorporating the heat production rates, temperatures at the anode and cathode surfaces are obtained and agree well with those measured with thermocouples.

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The single electrode Peltier heats of Li+/Li, H2/H− and Li+/Pd–Li couples in molten LiCl–KCl systems

Cited by 11 publications

References 18 publications

Electrochemical Impedance Spectroscopy Study of the Mass Transfer in an Anode-Supported Microtubular Solid Oxide Fuel Cell

Electrochemical Impedance Spectroscopy Study of the Mass Transfer in an Anode-Supported Microtubular Solid Oxide Fuel Cell

Current Distribution Analysis of a Microtubular Solid Oxide Fuel Cell with Surface Temperature Measurements

Thermal Analysis of a Microtubular Solid Oxide Fuel Cell Using Electrochemical Impedance Spectroscopy

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