Synthesis, characterization and physical properties of the skutterudites YbxFe2Ni2Sb12 (0≤x≤0.4)

► A new series of skutterudites has been prepared and characterised. ► Physical properties are affected by the degree of Yb filling. ► The highest thermoelectric performance is found for Yb0.15Fe2Ni2Sb12. ► The skutterudites decompose in air above 550 K.