ELECTROLYTE FOR LITHIUM SECONDARY BATTERY

摘要

PURPOSE:To obtain highly conductive nonaqueous electrolyte for lithium secondary battery having excellent charge/discharge efficiency of Li electrode by employing 3-methyl-2-oxasolijinon solvent mixed with more than one kind of non-proton ether having lower viscosity as the organic solvent in electrolyte. CONSTITUTION:Li<+> ion must have high movility in order to improve the charge/ discharge rate of lithium electrode and the conductivity of electrolyte. Although the charge/discharge rate of lithium in 2-methyl-2-oxasolijinon solvent electrolyte is low, it is improved together with the conductivity of electrolyte when employing mixture solvent with ether having lower viscosity. Non-proton ether is added to lower the viscosity of electrolyte and to improve the movility of Li<+> ion.