| 摘要 |
The present invention provides a non-aqueous electrolyte secondary battery that can improve the balance of the both of the output and capacity of the battery in the case when a negative electrode containing graphite particles having high crystallinity which have an exposed crystal face and are bonded with each other so as to be parallel to the orientation plane of each other as a negative electrode active material is used. Specifically, provided is a non-aqueous electrolyte secondary battery having a negative electrode containing graphite particles as a negative electrode active material, a positive electrode containing a lithium-containing oxide of a transition metal or a lithium-containing phosphate of a transition metal as a positive electrode active material, and a non-aqueous electrolyte in which a lithium salt is dissolved in an organic solvent, wherein the graphite particles have an exposed crystal face and are bonded with each other so as to be parallel to the orientation plane of each other, and the non-aqueous electrolyte contains a phosphate ester compound represented by the following general formula (1) to which an alkynyl group is bonded and/or an unsaturated phosphate ester compound represented by the following general formula (2):
wherein R 1 and R 2 each independently represents a hydrogen atom or an alkyl group having 1 to 8 carbon atom(s), and R 3 represents an alkyl group having 1 to 8 carbon atom(s), an alkenyl group having 2 to 8 carbon atoms, an alkynyl group having 2 to 8 carbon atoms or a halogenated alkyl group having 1 to 8 carbon atom(s),
wherein R 4 and R 5 each independently represents a hydrogen atom or an alkyl group having 1 to 8 carbon atom(s), R 6 represents an alkyl group having 1 to 8 carbon atom(s), an alkenyl group having 2 to 8 carbon atoms, an alkynyl group having 2 to 8 carbon atoms or a halogenated alkyl group having 1 to 8 carbon atom(s), and n represents a number of 1 or 2. |
