Laminate and secondary battery

A laminate comprising:

• a first active material-containing layer comprising a front surface and a back surface;
• a first film comprising an inorganic material, a front surface and a back surface, and the back surface being in contact with the front surface of the first active material-containing layer, wherein the content of the inorganic material in the first film is in a range of 80% by mass or more and 99.9% by mass or less;
• a second film comprising organic fibers, a front surface and a back surface, and one of the front surface and the back surface being in contact with the front surface of the first film,
• a first current collector having a top major surface and a bottom major surface;
• and
• a first current collector tab,
• wherein an absolute value of a difference between surface roughness Ra1 of the front surface of the first active material-containing layer and surface roughness Ra2 of the back surface of the first film is 0.6 μm or less,
• a portion of the top main surface the first current collector holds the back surface of the first active material-containing layer,
• another portion of the top main surface the first current collector not holding the first active material-containing layer comprises the first current collector tab,
• wherein the first current collector and the first current collector tab are in the form of a single conductive sheet, and
• the back surface of the first film covers a portion of a surface of the first current collector tab, which comprises a boundary with the first active material-containing layer.