| 摘要 |
The present invention relates to a lithium ion secondary battery including a binder that binds an active material to a current collector in at least one of the positive electrode and the negative electrode. The binder contains a base material including a resin having a benzene ring, and a polyacene additive selected from the group consisting of naphthalene, anthracene, tetracene, and derivatives thereof. The active material is a carbonaceous material or a lithium-containing composite oxide having a crystal structure in which a distance between nearest oxygen atoms is 0.19 to 0.29 nm. According to the configuration of the lithium ion secondary battery of the present invention, adhesion of the binder to the active material during the manufacturing of the lithium ion secondary battery is led to a closest packed crystal plane in the crystal structure of the active material, so that inhibition of moving of lithium ions in and out of the active material due to the binder can be reduced. |
