Investigation of the Electrochemical Formation of Li-C Intercalation Compounds.
Abstract
This investigation re-examines the possible undervoltage electrochemical formulation of Li-C intercalation compounds. The conditions simulated that of a cell which has failed due to depolarizer starvation. Carbon black cathodes were subjected to constant-current electrolysis in 1 M LiAsF solutions in propylene carbonate or 2-methyltetrahydrofuran. Cathode V-t curves displayed plateaus around + 1 V versus Li in which the cathode absorbed approximately 16 coulombs per sq cm before falling to 0.05 V where the runs were terminated. Aqueous extracts of the cathodes contained little or no hydroxide indicating the absence of Li-C compounds. However, the present work also showed that LiC6 rapidly reduces propylene carbonate to carbonate ion. Hence it remains possible that the undervoltage plateaus originated in the formation of intermediate Li-C compounds which rapidly reduce the solvent.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1983
- Accession Number
- ADA130879
Entities
People
- Jason N. Shih
- Larry Devries
- Patricia H. Smith
- Stanley D. James
- William P. Kilroy
Organizations
- Naval Ordnance Laboratory