A non-aqueous solvent is provided that includes ethylene carbonate in a range from 5% or more to less than 60%, propylene carbonate of 40% or less, and diethyl carbonate of 40% or more, as mass ratios. The non-aqueous electrolyte compositions are formed by further adding an electrolytic salt and, if necessary, unsaturated cyclic carbonic ester and a high molecular compound into the non-aqueous solvent. A non-aqueous electrolyte secondary battery is formed by using the non-aqueous electrolyte compositions.

 
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< Electrolyte for lithium secondary battery comprising chelating agent and lithium secondary battery using the same

< Nonaqueous electrolyte secondary battery

> Anode active material for lithium secondary battery and manufacturing method thereof

> Electrolyte for improving life characteristics at high temperature and lithium secondary battery comprising the same

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