Objectives: To develop Porous Transport Layers (PTL) to be used in low-temperature electrolysis cells with optimized structural properties through innovative production methods, such as tape casting. Description: PTLs have an important role in low-temperature electrolysis cells, being responsible for water/electrolyte distribution, gas (oxygen and hydrogen) removal, charge transfer, and mechanical support for the membrane. Therefore, their structural properties play an important role in defining the performance of the electrolysis cells, leading to the need of optimizing their porosity, pore diameters, pore structure, morphology, thickness, and permeability. Thus, this work focuses on the optimization of the PTL properties adopting established methods like tape casting or innovative ones. The first part of the works will focus on literature review, to better understand the state of the art of PTL production and characterizations. Then, the work will focus on PTL structural optimization. The activities will include development and characterization of small size PTLs (< 25 cm2) in FBK and UFI laboratory facilities, as well as modelling and simulation of PTL to optimize their mass transfer, charge transfer and structural properties. Additionally, particular attention will be dedicated to the interactions at the interface between the PTL and the CL. The second part of the work will focus on the optimization of the production methods, optimizing the production process for scale- production. This phase will consider the optimization of the process on both a technical and economic point of view.