Self-diffusion coefficients, molten salt

Typical values of self-diffusion coefficients and mutual diffusion coefficients in aqueous solutions and in molten salt systems such as (K,Ag)N03 are of the order... 

Some 30 years ago, transport properties of molten salts were reviewed by Janz and Reeves, who described classical experimental techniques for measuring density, electrical conductance, viscosity, transport number, and self-diffusion coefficient. 

Typical values of self-diffusion coefficients and mutual diffusion coefficients in aqueous solutions and in molten salt systems such as (K,Ag)N03 are of the order of 10 m s and the coefficients do not usually vary by more than a factor of 10 over the whole composition range [1, 2, 15]. From measurements in pure ionic liquids we have learned that their self-diffusion coefficients are only of the order of 10 m s From this point of view it is interesting to investigate systems of ordinary and ionic liquids. Figure 4.4-3 shows the results of first measurements in the methanol/[BMIM][PF6] system, which can be seen as a prototype for a system in which an organic and an ionic liquid are mixed. 

The Nernst-Einstein relation shows the dependence between the self-diffusion coefficient Dt and the equivalent conductivity A of molten salts ... 

The Li cation self-diffusion coefficient in a binary EOi2/LiTFSI electrolyte was dominated (90%) by Li" vehicular diffusion of the Li" with an EO12 solvent. In EO12TFSI /Li" molten salt electrolyte, half of the Li" motion was attributed to... 

Table 3.20 The and parameters of the self-diffusion coefficient D/10 s = A exp (—Bo/RT) of molten salts (According to Klemm [265] and Sjoblom [267] or as noted...

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