METHOD FOR PREPARING AN ACTIVE ELECTRODE ASSEMBLY

The method comprises the following steps: a) providing a homogeneous mixture (1) comprising at least one electrochemically active material and an aqueous solution, the homogeneous mixture (1) being intended, after drying, to form a porous active material (7) for an electrode, b) shaping the homogeneous mixture (1) by co-lamination between a current collector (4) and a microporous film (5) so as to form a three-layer assembly (6) comprising the homogeneous mixture (1) laminated in the form of a strip, of which a first face is assembled to the current collector (4) and of which a second opposite face is assembled to the microporous film (5), the co-lamination partially reducing the quantity of aqueous solution present in the homogeneous mixture (1), c) drying the three-layer assembly (6) so as to evaporate the residual aqueous solution and obtain an active assembly (100) comprising a strip (9) of porous active material (7) between the current collector (4) and the microporous film (5).