ELECTROCHEMICAL CELLS OF SPECIFIC LITHIUM BATTERIES INCLUDING NON-AQUEOUS ELECTROLYTES BASED ON AT LEAST ONE SULPHONATE AND/OR CARBONATE SOLVENT AND AT LEAST ONE ADDITIVE OF THE CYCLIC DIESTER FAMILY

摘要

The invention relates to electrochemical cells lithium battery comprising: -a positive electrode comprising as active material a lithiated oxide of the following formula: LiNi _1-x Mn _{1 + x} O ₄ wherein 0 x 1; -a negative electrode comprising, as an active material, a carbonaceous material; and -an electrolyte disposed between said positive electrode and said negative electrode comprising: * Comprennant a solvent a mixture of a sulfone and carbonate solvent; * At least one additive of the formula (I): wherein R ₁ to R ₄ represent, independently of one another, a hydrogen atom, an alkyl group comprising 1 to 5 carbon atoms, in which one or more hydrogen atoms may be substituted by halogen; * At least one lithium salt.