| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electrolyte for a lithium secondary battery that is preferably used in a secondary battery operating at high temperatures for an electric vehicle or a hybrid electric vehicle since it has superior high-temperature storage characteristics, and to provide the lithium secondary battery that contains the electrolyte. <P>SOLUTION: The nonaqueous electrolyte for the lithium secondary battery, containing a lithium salt and an organic solvent, contains a salt containing 1-ethyl-2, 3-dimethyl imidzolium ion represented by chemical formula (1) as a cation, and the lithium secondary battery includes this electrolyte. In the chemical formula (1), X is selected from among a group comprising a halogen, ClO<SB>4</SB>, B<SB>10</SB>Cl<SB>10</SB>, PF<SB>6</SB>, CF<SB>3</SB>SO<SB>3</SB>, CF<SB>3</SB>CO<SB>2</SB>, AsF<SB>6</SB>, SbF<SB>6</SB>, AlCl<SB>4</SB>, CH3SO<SB>3</SB>, CF<SB>3</SB>SO<SB>3</SB>, C<SB>2</SB>F<SB>5</SB>SO<SB>2</SB>, (CF<SB>3</SB>SO<SB>2</SB>)(C<SB>4</SB>F<SB>9</SB>SO<SB>2</SB>), CF<SB>3</SB>SO<SB>2</SB>, and a lower aliphatic carboxylic acid. <P>COPYRIGHT: (C)2008,JPO&INPIT |
