NONAQUEOUS ELECTROLYTE SOLUTION FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY CONTAINING SAME

A method of preparing a tricyanoalkoxy alkane compound is disclosed. The tricyanoalkoxy alkane compound is prepared by reacting an alcohol compound including at least three hydroxyl groups and a nitrile compound in the presence of a potassium alkoxide catalyst. A non-aqueous electrolyte solution comprising the tricyanoalkaxy alkane compound and a lithium secondary battery also are disclosed. The swelling of the battery may be prevented.