Electrochemical device and nonaqueous electrolyte solution for electrochemical device

• Main Authors: KOH, MEITEN, NAKAZAWA, HITOMI, TAEDA, MAYUKO, SAWAKI, KYOUHEI, SAKATA, HIDEO, TANI, AKINORI, SANAGI, TOMOYO, NAKAZONO, AOI, YAMAUCHI, AKIYOSHI, ADACHI, YUKI, TOMITA, MASAHIRO
• Format: Patent
• Language: Chinese; English
• Published: 16.11.2012
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The present invention addresses the problem of providing an electrochemical device having superior storage characteristics at high temperatures and superior high voltage cycle characteristics and a nonaqueous electrolyte solution used therein. The present invention is an electrochemical device provided with a positive electrode, negative electrode, and a nonaqueous electrolyte solution that contains a nonaqueous solvent and an electrolyte salt. This electrochemical device is characterized by the nonaqueous solvent containing a fluorine-containing chain carbonate shown by RfOCOOR (wherein Rf is a C1-4 fluorine-containing alkyl group and R is a C1-4 alkyl group) and containing compounds shown by RfOH, ROH, and ROCOCl at a total of 5000 ppm to the fluorine-containing chain carbonate.