| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electrochemical device which is superior in storage characteristics and high voltage cycle characteristics at a high temperature and also to provide a nonaqueous electrolyte used for the electrochemical device. <P>SOLUTION: The electrochemical device includes: a positive electrode, a negative electrode and a nonaqueous electrolyte containing a nonaqueous solvent and an electrolyte salt. The nonaqueous solvent contains a compound expressed by general formula (1) (in the formula, R is HCF<SB POS="POST">2</SB>CF<SB POS="POST">2</SB>CH<SB POS="POST">2</SB>OCH<SB POS="POST">2</SB>- or CF<SB POS="POST">3</SB>CH<SB POS="POST">2</SB>OCH<SB POS="POST">2</SB>-) and also contains a total of 5,000 ppm or less of a compound expressed by a specific formula against the compound expressed by the formula (1). <P>COPYRIGHT: (C)2013,JPO&INPIT |
