ISSN:
1572-8838
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Electrical Engineering, Measurement and Control Technology
Notes:
Abstract The interdiffusion coefficients in Li-Mg alloys and Li-Mg-Al alloys were evaluated using transient techniques such as chronopotentiometry and chronoamperometry. Anodic or cathodic pulses were imposed on the alloy electrodes under galvanostatic and potentiostatic conditions. Taking into account charging of the double layer, ohmic drop, adsorption of diffusing species and electrolyte-electrode boundary shift, the diffusion coefficients of lithium in Li-Mg alloys (α-phase and β-phase) and in Li-Mg-Al alloys were estimated at around 420°C. In the case of Li-Mg α-phase alloys, the values of the diffusion coefficients,D Li, can be represented in a polynomial expansion of the composition of the alloy,X Li (mol%) as follows: $$ln D_{Li} = - 19.850 - 0.4294X_{Li} + 0.0249X_{Li}^2$$ The diffusion coefficients of lithium in Li-Mg (β-phase) alloys show extremely large values (≃10−6 cm2s−1) as also in the Li-Al β-phase alloys.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01023304
Permalink