Patent ID: 9666904
Date: 2017-05-30
CPC Classifications: H01M,Y02E,Y02P,Y02T

Claim:
1. A secondary battery, comprising an electrode element in which a positive electrode and a negative electrode are opposed to each other, and an electrolyte solution, wherein the negative electrode active material comprises a metal alloyable with lithium, and/or a metal oxide capable of intercalating/deintercalating lithium ions, and the electrolyte solution is a nonaqueous electrolyte solution comprising an electrolyte salt dissolved in a nonaqueous solvent, and comprises a carbonyl compound represented by the following formula (1): wherein two R 1 s may be the same or different from each other, and each independently represents hydrogen atom, substituted or unsubstituted alkyl group, cycloalkyl group, alkenyl group, alkynyl group, substituted or unsubstituted aromatic group, oxyalkylene group represented by the following formula (2): wherein R hydrocarbon group having 1 to 12 carbon atoms, and n represents an integer of 1 to 10, substituted alkoxy group, cycloalkyloxy group, alkenyloxy group, alkynyloxy group, substituted or unsubstituted aromatic oxy group, or oxyalkyleneoxy group represented by the following formula (2b): wherein R hydrocarbon group having 1 to 12 carbon atoms, and n represents an integer of 1 to 10.