Kinetics of electrochemical incorporation of lithium into aluminium

Journal Article · Sun May 01 04:00:00 EDT 1977 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2133378· OSTI ID:6942044

Melendres, C A

The electrochemical incorporation of lithium into aluminum was investigated by chronocoulometric, galvanostatic, and potentiostatic techniques. Results of the chronocoulometric measurements were interpreted in terms of the theory developed by Astakhov. Incorporation of lithium to form the solid solution ..cap alpha..-phase is limited by its rate of diffusion into aluminum, with a measured diffusion coefficient of about 4 x 10/sup -10/ cm/sup 2//sec at 450/sup 0/C. Implantation at potentials where a layer of intermetallic compound forms on the electrode surface was found to be limited initially by the reaction to form the compound LiAl (..beta..-phase) and subsequently by the rate of lithium diffusion into the growing ..beta..-phase layer. The results of galvanostatic transient measurements indicate a diffusivity of lithium in ..beta..-LiAl of the order of 10/sup -8/ cm/sup 2//sec and a fast charge transfer step. The initial steps in the formation of the intermetallic compound appear to involve typical electrocrystallization (i.e., nucleation and growth) processes.

• Research Organization: Argonne National Lab., IL
• OSTI ID: 6942044
• Journal Information: J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 124:5; ISSN JESOA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ALKALI METALS
ALLOYS
ALUMINIUM ALLOYS
CHEMISTRY
DIFFUSION
ELECTROCHEMISTRY
ELEMENTS
FABRICATION
INTERMETALLIC COMPOUNDS
LITHIUM
LITHIUM ALLOYS
METALS
PERMEABILITY