Theoretical study of intercalation in constant current cycling

• Published in: Solid state ionics Vol. 13; no. 1; pp. 45 - 52
• Main Authors: Chabagno, J.M., Deroo, D., Dalard, F., Merienne, J.L.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.01.1984; Elsevier Science
• Subjects: Applied sciences; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Exact sciences and technology; Lithium; Secondary cell; Solid electrolyte
• ISSN: 0167-2738; 1872-7689
• DOI: 10.1016/0167-2738(84)90061-4

We present a theoretical study on the cycling of electrochemical generating cells in which the cathode is an alkali metal and the positive electrode is composed of a host structure. Under constant current conditions, when the diffusion of the lithium ion is the limiting step in the overall reaction kinetics, the depth of first discharge was calculated by Atlung. It is possible to extend this calculation to subsequent recharges and discharges by allowing for an intermediate rest period during which the alkali metal concentration can be homogenized throughout the host material before cycling is resumed. The discharge and charge times can then be expressed as a function of the number of cycles and of the depth of the first discharge. Our experimental results obtained with Li-polyethylene oxide loaded in LiClO 4-MoO 2 are consistent with our theoretical results.