Negative electrode for lithium-ion secondary battery and lithium-ion secondary battery
View Patent ↗The negative electrode for lithium-ion secondary battery is used in which a product of tensile strength and thickness of a negative electrode having a negative electrode active material layer containing silicon and silicon oxide as main components is 3.8 to 9.0 N/mm and a value obtained by dividing the product of the tensile strength and the thickness of the negative electrode by a product of tensile strength and thickness of a negative electrode current collector is 1.06 to 1.29.
1. A negative electrode for lithium-ion secondary battery, comprising:
a negative electrode current collector having a tensile strength and a thickness, the tensile strength of the negative electrode current collector being 237 N/mm 2 or more and 441 N/mm 2 or less; and
a negative electrode active material layer formed on the negative electrode current collector,
the negative electrode having a tensile strength and a thickness;
the negative electrode active material layer containing (1) silicon and silicon oxide as main components and (2) a binder and a conductive auxiliary agent;
a product of the tensile strength and thickness of the negative electrode being 3.8 to 9.0 N/mm; and
a value obtained by dividing the product of the tensile strength and the thickness of the negative electrode by a product of the tensile strength and thickness of the negative electrode current collector being 1.06 to 1.29.
2. A lithium-ion secondary battery using the negative electrode according to claim 1 .