Solid oxide fuel cells (SOFCs) are promising devices for energy conversion applications due to their high electrical efficiency and eco-friendly behavior. Nowadays, commercial SOFCs are electrically efficient at high operating temperatures, typically between 800 and 1000 °C. This high-temperature range restricts not only their real-life applications but also their lifetime. Our basic goal deals with the objective to reduce the operating temperature by working in the range from 500 to 700 °C. Among SOFCs, metal-supported intermediate-temperature solid oxide fuel cells (MS-IT-SOFCs) may provide very cheap SOFCs with increased lifetime and reduced operating temperature. In view of developing highly efficient electrodes, this work focuses on the physical and electrical characterizations of porous GDC backbones which have been impregnated with LSCF sol–gel solutions and NiO solutions, for composite cathodes and anodes, respectively. The porosity of the backbone was controlled by the addition of different pore-formers. The performance of 8 different samples was compared by studying the evolution of the electrical resistivity in function of temperature. An important effect has been demonstrated: whatever the temperature, from 500 to 700 °C, the resistivity can be tuned both by the solution viscosity and by the kind of pore-former.