Battery, in particular a button battery, and method of manufacturing same

A method of manufacturing a battery, comprising:

• a case provided with a container and a cap,
• a polymer gasket that is compressed between the container and the cap and bonded to the case in order to seal the case and galvanically isolate the container from the cap;
• the method comprising successively:
• a step of implanting, by tribochemical sand blasting on a surface of the polymer gasket intended to be joined to the case, alumina particles coated in silica in order to form, on the surface of the polymer gasket, a silicatised layer,
• a step of adding a layer of adhesive to the surface of the polymer gasket comprising the silicatised layer and/or on a surface of the container intended to be joined to the polymer gasket and/or on a surface of the cap intended to be joined to the polymer gasket,
• a step of assembling the case with the polymer gasket positioned by compression between the container and the cap and bonded to the case with the layer of adhesive.