Asymmetric and/or low-symmetry fluorine-containing phosphate ester for use in a nonaqueous electrolyte solution

• Main Authors: SAKODA KOTARO, KONO KENTARO, MIMURA HIDEYUKI, EGUCHI HISAO, AOKI MASAHIRO
• Format: Patent
• Language: Chinese; English
• Published: 23.05.2012
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

Disclosed is a fluorine-containing phosphate ester used to impart flame retardancy to an electrolyte solution in a nonaqueous secondary battery. The disclosed fluorine-containing phosphate ester is highly flame-retardant and provides high performance in terms of battery characteristics such as charge-discharge characteristics. Also disclosed are a method for manufacturing said fluorine-containing phosphate ester and a nonaqueous electrolyte solution and nonaqueous secondary battery containing said fluorine-containing phosphate ester. Further disclosed is a fluorine-containing phosphate ester that can be used to formulate a safer electrolyte solution composition that is good at dissolving an electrolyte. The disclosed fluorine-containing phosphate ester for use in a nonaqueous electrolyte solution is represented by general formula (1) and at least 30% of the weight thereof comprises fluorine atoms. In the formula, R represents a C1-10 alkyl group or a fluorine-containing alkyl group. Either A or B represents a