▎ 摘　　要

NOVELTY - A flexible sweat-activated battery (100) comprises a first fabric layer arranged to cover a skin of a user and used for absorbing sweat from the skin; a magnesium sheet (120); a salt-doped fabric layer comprising a second fabric layer doped with particles of a potassium salt or a sodium salt; a graphene-coated nickel foam (140) comprising a nickel foam and a graphene layer covering the nickel foam, where graphene layer is located between the nickel and the salt- doped fabric layers; and a porous tape covering the nickel foam and comprising pores for allowing oxygen from environment to flow into the nickel. USE - Flexible sweat-activated battery for use in wearable device for measuring one or more biomarkers (claimed). ADVANTAGE - The flexible sweat-activated battery is capable of powering an intelligent and flexible electronics for health monitoring purposes with different biosensors. The battery is based on the oxidation-reduction reaction (redox) between magnesium and oxygen. A thin layer of magnesium and nickel foam coated with graphene are working as the electrodes. Cotton with high absorption capabilities is placed between the magnesium sheet and the skin, helping to absorb the sweat. A porous adhesive tape is a substrate for the battery parts while allowing the oxygen to pass through it easily. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a wearable device for measuring one or more biomarkers. DESCRIPTION OF DRAWING(S) - The drawing shows an exploded view of the layer-by-layer structure of a flexible sweat-activated battery (FSAB). 100Flexible sweat-activated battery 110Cotton layer 120Mg sheet 130Potassium chloride-doped cotton layer 140Graphene-coated nickel (Ni/G) foam 150Porous tape