Non-aqueous electrolytic secondary battery

A non-aqueous electrolyte secondary battery, comprising:

• a wound electrode assembly in which a band-shaped positive electrode and a band-shaped negative electrode are wound with a separator interposed therebetween;
• and
• an outer housing can that houses the electrode assembly, wherein
• the positive electrode has a positive electrode mixture layer formed on a surface of a sheet-shaped positive electrode current collector,
• the negative electrode includes a sheet-shaped negative electrode current collector having first and second side surfaces,
• the negative electrode has a negative electrode mixture layer formed on a surface the first and second side surfaces of the sheet-shaped negative electrode current collector,
• the negative electrode mixture layer includes a first negative electrode mixture layer and a second negative electrode mixture layer,
• the negative electrode mixture layer includes a chargeable and dischargeable negative electrode active material and a binder,
• the negative electrode includes a both-surface coated portion in which the first negative electrode mixture layer is formed on both the first and second side surfaces of the negative electrode current collector and a one-surface coated portion in which the second negative electrode mixture layer is formed on one of the first and second side surfaces of the negative electrode current collector,
• at least a part of the one-surface coated portion is disposed on an outermost circumference of the electrode assembly,
• the one-surface coated portion is disposed within a range of 50% or more of a circumference length of the outermost circumference of the electrode assembly,
• at least a part of an exposed surface of the negative electrode current collector in the one-surface coated portion is directly contacted with an inner face of the outer housing can, and
• a second charge expansion coefficient of the second negative electrode mixture layer in the one-surface coated portion is larger than a first charge expansion coefficient of the first negative electrode mixture layer in the both-surface coated portion.