Nonaqueous secondary battery
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKoji Takahata, Machiko Abe, Akihiro Ochiai
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Abstract
A nonaqueous secondary battery 100A has a negative electrode sheet 240A in which a negative electrode active material layer 243A is held by a negative electrode current collector 241A. Contained within the negative electrode active material layer 243A is a binder 730 which includes a rubber-based binder or a resin having a binder function. The rubber-based binder or the resin having a binder function is abundantly present, within the negative electrode active material layer 243A, in a surface vicinity A1 of the negative electrode active material layer 243A.
Claims12
A nonaqueous secondary battery comprising:
- a negative electrode current collector, and
- a negative electrode active material layer held by the negative electrode current collector,
- the negative electrode active material layer including negative electrode active material particles and a binder, and
- the binder containing a rubber-based binder or a resin having a binder function, wherein
- a surface vicinity of the negative electrode active material layer contains more of the rubber-based binder or resin having a binder function than in portions of the negative electrode active material layer other than the surface vicinity.
Dependencies are inferred from the claim text.