| 摘要 |
A new class of low flammability solvents for use in the electrolyte of a nonaqueous battery comprising a compound of the general formula <IMAGE> in which R is a C1-C10 alkyl group, X is a C1-C8 acyclic group which can be linear, branched, saturated or unsaturated and Y is a C1-C10 alkyl group or a carbonyl group O <IMAGE> in which R' is a C1-C10 alkyl group. When Y is a carbonyl group a class of diesters is disclosed which are prepared from a dihydroxy alcohol and two molecules of a monocarboxylic acid. When Y is a C1-C10 alkyl group a class of ether-esters is disclosed. The preferred solvents are ethylene glycol diacetate and 2-ethoxyethylacetate. The solvents are preferably used in combination with a cosolvent such as propylene carbonate and most preferably employ additions of more volatile ether cosolvents such as dimethoxyethane or 1,3-dioxolane for increased discharge performance. Soluble salts used in the electrolyte solution are, for example, LiCF3SO3LiBF4. The preferred lithium salt is LiCF3SO3.
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