Positive electrode, non-aqueous electrolyte secondary battery, and method of producing positive electrode

A positive electrode for a non-aqueous electrolyte secondary battery, the positive electrode comprising at least:

• a positive electrode current collector;
• and
• a positive electrode composite material layer including a conductive material and a positive electrode active material,
• the positive electrode composite material layer being disposed on a surface of the positive electrode current collector,
• the positive electrode current collector comprising an aluminum foil and an aluminum oxide hydrate film,
• the positive electrode composite material layer being in direct contact with a surface of the aluminum oxide hydrate film,
• the aluminum oxide hydrate film covering a surface of the aluminum foil, the aluminum oxide hydrate film having a thickness not smaller than 10 nm and not greater than 500 nm,
• the aluminum oxide hydrate film having a porosity not lower than 10% and not higher than 50%,
• at least part of the conductive material being disposed within pores that are formed in the aluminum oxide hydrate film,
• the pores have a width W1 that is greater than the width W2 of the conductive material and is smaller than the width W3 of the positive electrode active material.