Thermal Decomposition of Dimethoxymethane Electrolyte Solution.
Abstract
The electrolyte solution prepared from LiAsF6 and dimethoxymethane (DMM) has been investigated for use in secondary lithium batteries. Storage tests were conducted at 70 C. In the presence of Li the best samples of electrolyte were stable to Li for more than one month. In the absence of Li, the electrolyte solution decomposed within days with loss of DMM, and formation of methyl formate and dimethyl ether in a 1:2 ratio. The products were identified and product ratio determined using IR and proton NMR spectroscopy. A chain reaction mechanism is proposed for the decomposition which postulates oxygen-stabilized carbocation intermediates. Because the reaction may be impurity initiated and is quenched by Li metal, the importance of purification and storage of electrolyte with Li, is emphasized. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1982
- Accession Number
- ADA116789
Entities
People
- J. S. Foos
- V. Meltz