ELECTRODE BODY AND ELECTRODE BODY MANUFACTURING METHOD

摘要

An electrode body includes a positive electrode and a negative electrode. The positive electrode includes a positive electrode current collector and a positive electrode mixture layer disposed on the positive electrode current collector. The negative electrode includes a negative electrode current collector, a negative electrode mixture layer disposed on the negative electrode current collector and an insulation layer disposed on the negative electrode mixture layer and containing insulation particles. An insulation layer containing the insulation particles is formed on a side surface of width-direction end of the negative electrode so as to cover the side surface of the end portion.

主权项

1. An electrode body for a non-aqueous electrolyte secondary battery, comprising:
a positive electrode including a positive electrode current collector and a positive electrode mixture layer disposed on the positive electrode current collector; and a negative electrode including a negative electrode current collector, a negative electrode mixture layer disposed on the negative electrode current collector, and an insulation layer disposed on the negative electrode mixture layer, the insulation layer containing insulation particles, and the positive electrode and the negative electrode laminated one above another, the positive electrode current collector including a first positive electrode end portion and a second positive electrode end portion disposed at an opposite end to the first positive electrode end portion in a width direction of the positive electrode current collector, and a positive electrode mixture layer non-forming portion, in which the positive electrode mixture layer is not disposed, being provided only at a side of the first positive electrode end portion, the negative electrode current collector including a first negative electrode end portion and an opposite second negative electrode end portion disposed in a width direction of the negative electrode current collector, and a negative electrode mixture layer non-forming portion, in which the negative electrode mixture layer is not disposed, being provided only at a side of the first negative electrode end portion, the first positive electrode end portion and the first negative electrode end portion being disposed so as to exist at opposite sides from each other in the width direction, both width-direction ends of the positive electrode mixture layer being positioned more inward in the width direction than both width-direction ends of the negative electrode mixture layer, and an insulation layer containing the insulation particles being formed on a side surface of the second negative electrode end portion so as to cover the side surface of the second negative electrode end portion.