Importance

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Abstract

A non-aqueous electrolyte secondary battery in an aspect of the present invention includes an electrode body formed by winding a positive electrode plate and a negative electrode plate with a separator interposed therebetween; a non-aqueous electrolyte; an outer can that houses the electrode body and the non-aqueous electrolyte; and a sealing body that seals an opening of the outer can. The negative electrode plate has a negative electrode mixture layer formed on a negative electrode current collector. The negative electrode mixture layer contains a silicon material and graphite as negative electrode active materials. The negative electrode plate has, at its winding start end, a first negative electrode current collector exposed portion to which a negative electrode tab is connected. The negative electrode plate has, at its winding finish end, a second negative electrode current collector exposed portion in contact with an inner wall surface of the outer can.

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First Claim