Structural, Thermal and Electrochemical studies of Sm substituted CrFeO3 Nano‐Pervoskites.

• CrSm x Fe 1- x O 3 pervoskite nanoparticles were prepared and investigated. • Their structural, crystalline structure, thermal properties were studied. • HTEM images showed large particles sizes giving the whole picture of the nanoparticles. • TGA showed decrease in sample weight giving largest weight loss around ≈ 31%. • Their electrochemical performance has been studied as well. Variation of the bulk density D , theoretical density D x , and porosity P with x. [Display omitted] CrSm x Fe 1- x O 3 pervoskite nanoparticles, (x = 0, 0.035, 0.07, 0.1 and 0.15) were prepared via auto-compassion strategy. XRD plots proved the complete emersion of the solitary-phase orthorhombic Nano-pervoskites. Samples' crystallite size R surged with x. FTIR confirmed the evolution of Orthorhombic Pervoskite phase. HTEM images showed relatively large particle size for all samples giving the whole picture of the nanoparticles. DTA/TGA showed decrease in sample weight giving largest weight loss around ≈31%. Cyclic voltammetry and galvanostatic charge/discharge measurements were adopted to investigate the electrochemical merits of CrSm 0.15 Fe 0.85 O 3 pervoskite nanoparticles in 1 M KOH electrolyte solution. CrSm 0.15 Fe 0.85 O 3 pervoskite nanoparticles exhibited specific capacitance of 1840 mF/g at 50 mV/s. Nearly, rectangular shape of cyclic voltammetry curve revealed that electric double layer capacitance was dominated. The study presents a promising application of CrSm 0.15 Fe 0.85 O 3 pervoskite nanoparticles as electrode materials for energy storage. Nyquist plots for CrSm 0.15 Fe 0.85 O 3 pervoskite nanoparticles appeared in the frequency range from 1.0 Hz to 20 kHz. CrSm 0.15 Fe 0.85 O 3 pervoskite nanoparticles retains low value of solution resistance (Rs) as 50 Ω. [ABSTRACT FROM AUTHOR]