The MPI Building Block concept provides unusual versatility and performance with solid state reliability, This modular electrochemistry system accepts inputs from virtually any detector you provide and has over 60 applications to serve your needs.
Paper No. 110. 1 The term ionic constituent refers to the ion-forming portion of an electrolyte, without specification of the extent of dissociation, association, solvation, etc. See, e.g., reference (4), p. 60. Thus the ionic constituents in an aqueous solution of CdR are Cd! + and I-, regardless of the fact that, the actual species in solution may include hydrated cadmium ions, anionic complexes such as Cdl4!_, etc. Measurements of macroscopic properties yield information only on the components (Cdl-j and water) or the ionic constituents. Unusual values of these properties may suggest the microscopic nature of the species (e.g., ions). More detailed information on the nature of the species requires measurements sensitive to the species properties and distribution (e.g., spectra).Alternative methods of conductance measurement are pointed out, as are some aspects pertinent to the measurement of dielectric constant. The extent of coverage can easily be modified to suit the level of the course and the time available.Phenomenology: Ohm's Law Applied to Electrolytes rent occurs whether the system be liquid, solid, or gaseous, single component or multicomponent. (See reference (47)).
During charge or discharge of batteries with a binary molten salt mixture as t~he electrolyte, composition gradients are produced by the electrode reactions and the differences in mobilities of the electroactive and nonelectroactive ions. The effects of current density, electrode separatioa, and initial composition of the electrolyte are predicted by an analytical solution of the flux equations derived with transport properties similar to those of LiCI-KC1 mixtures. Numerical solution of the flux equations predicts the composition profiles in lithium sulfur battery analogs with LiC1-KCI mixtures of differing compositions. Either complete depletio,n of the electroactive constituent at one electrode, or precipitation of a solid phase at the electrodes, could result from the predicted composition gradients. Changes in electrolyte composition at the electrodes may also affect J-phase formation at the sulfur electrode during discharge. * Electrochemical Society Active Member. ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 169.230.243.252 Downloaded on 2015-02-18 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 169.230.243.252 Downloaded on 2015-02-18 to IP
The irregular ionic lattice model (IILM) is applied to predict the vapor pressures and solubilities
of carbon dioxide dissolved in 1-n-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6])
and in 1-n-octyl-3-methylimidazolium tetrafluoroborate ([C8mim][BF4]) ionic liquids at temperatures ranging from 298.15 to 333.15 K. The model contains only two parameters; they are
shown to be independent of an arbitrarily chosen reference state. The parameters show a slight
dependence on temperature, but this dependence is ignored in computations to demonstrate
the rigor of the IILM in predicting CO2 solubility at high and low pressures at various
temperatures. Model predictions are compared against the experimental data of Anthony et al.
(J. Phys. Chem. B
2002, 106, 7315) and of Blanchard et al. (J. Phys. Chem. B
2001, 105, 2437).
The usefulness of the model is in predicting CO2 solubilities at temperatures and pressures
where experimental data are unavailable.
Composition gradients, in molten
AgNO3‐NaNO3
mixtures contained in silica frits, are produced by electrolysis between silver electrodes and analyzed by three methods: (i) in situ potentiometry, (ii) chemical analysis of sections of quenched electrolyte, and (iii) scanning electron microscopy with associated x‐ray fluorescence spectroscopy. The composition changes are calculated a priori from transport and thermodynamic properties independently measured in the free melt and corrected for the porosity of the frits. Since the ion flows in
AgNO3‐NaNO3
are analogous to those in the
normalLiCl‐normalKCl
electrolyte of Li/S batteries, the former system serves as a convenient model system for the mixed electrolyte of the Li/S battery. The predicted gradients are compared to the experimental data from the three methods.
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