Electrode structure and non-aqueous electrolyte secondary battery

A non-aqueous electrolyte secondary battery comprising:

• a positive electrode;
• a negative electrode;
• a heat-resistant layer formed on at least any one of the positive electrode and the negative electrode;
• and
• a non-aqueous electrolyte;
• wherein
• the heat-resistant layer includes heat-resistant particles having at least a surface including a metal compound,
• the heat-resistant layer has an average thickness in the range of 0.5 μm to 5 μm, the heat-resistant layer has a porosity of 25% to 55%, the heat-resistant layer has an average surface roughness (Ra) of 0.35 μm or less,
• metal ions in the metal compound have an electronegativity of 13.5 or more, and
• a plurality of exposed portions in which an electrode located under the heat-resistant layer is partially exposed are present on a surface of the heat-resistant layer, and a maximum length for each of the exposed portions is 3 μm or more and 30 μm or less.