Lithium ion battery and method for producing the same

摘要

Provided is a lithium ion battery having a long service life by improving an adhesion strength between a binder resin and a metal foil. A binder resin, which is a compound having a chemical structure that contains a polyvinylidene fluoride molecular chain, a six-membered ring such as a cyclohexane ring, and an end group selected from the group consisting of SiX3, SH, NH2, GeX3, and TiX3 (wherein X is a functional group that undergoes a condensation reaction), wherein the six-membered ring is disposed in a region between the polyvinylidene fluoride molecular chain and the end group, is mixed with an active material and applied to a metal foil, and the binder resin is chemically bonded to metal atoms such as copper atoms on the surface of the metal foil.

主权项

1. A binder resin, which is a compound having a chemical structure that contains a polyvinylidene fluoride molecular chain, a six-membered ring containing carbon and hydrogen, and an end group selected from the group consisting of SiX3, SH, NH2, GeX3, and TiX3, wherein X is a functional group that undergoes a condensation reaction, wherein the six-membered ring is disposed in a region between the polyvinylidene fluoride molecular chain and the end group; the binder resin being represented by chemical formulawherein Y1 and Y2 may be the same or different and are each selected from the group consisting of SiX3, SH, NH2, GeX3, and TiX3, wherein X is a functional group that undergoes a condensation reaction; R1 and R4 are each a linear alkyl group having 2 to 4 carbon atoms to which a fluorine atom may be attached; R2 and R3 are each a linking group that contains a six-membered ring containing carbon and hydrogen; and n is a positive integer of at least 2.