Cr doping effect in B‐site of La 0.75 Sr 0.25 MnO 3 on its phase stability and performance as an SOFC anode

La 0.75 Sr 0.25 Cr y Mn 1− y O 3 (LSCM) ( y = 0.0–0.6) composite oxides were synthesized by a complexing process of combining ethylene diamine tetraacetic acid (EDTA) and citrate. X‐ray diffraction (XRD), temperature‐programmed reduction, electrical conductivity, I–V polarization, and impedance spectroscopy were conducted to investigate the Cr doping effect of La 0.75 Sr 0.25 MnO 3 on its phase stability and electrochemical performance as a solid‐oxide fuel cell (SOFC) anode. The chemical and structural stabilities of the oxides increased steadily with increasing Cr doping concentration, while the electrical conductivity decreased on the contrary. At y ≥ 0.4, the basic perovskite structure under the anode operating condition was sustained. a cell with 0.5‐mm‐thick scandia‐stabilized zirconia electrolyte and La 0.75 Sr 0.25 Cr y Mn 1− y O 3 anode delivered a power density of ∼15 mW·cm −2 at 850°C.