“…X-ray analysis of commercial LSCF exhibits a perovskite phase (JCPDS # 49–0284). The peaks at about 2θ ≈ 23, 33, 40, 47, 53, 58, 69, 73, and 78° are consistent with the characteristic peaks for LSCF, which are similar to the XRD results of the previous reports . Moreover, some additional peaks at 2θ ≈ 31, 36.8, and 44° were also observed corresponding to the segregation of Co as Co 3 O 4 .…”