Novel corn cob-like Fe₃O₄@Ni₃S₂ as high-performance electrode for supercapacitors

Abstract

Corn cob-like Fe 3 O 4 @Ni 3 S 2 nanocomposites was synthesized through a facile two-step hydrothermal process. The precursor was obtained by a facile calcination of a Fe-MOF template, then, nickel sulfide coated on iron oxide composites were synthesized using a hydrothermal method. In addition, the fabricated Fe 3 O 4 @Ni 3 S 2 electrode revealed a great electrical performances with a maximum specific capacitance of 1200[Formula: see text]F[Formula: see text]g[Formula: see text] at 1[Formula: see text]A[Formula: see text]g[Formula: see text], a capacitance retention of 83% could be observed after 1000 cycles at a great charge–discharge current density of 5[Formula: see text]A[Formula: see text]g[Formula: see text]. We believed that the excellent performance might be ascribed to the synergistic effect between the Fe 3 O 4 and Ni 3 S 2 . Thus, the results demonstrate the corn cob-like Fe 3 O 4 @Ni 3 S 2 composite is prominent candidate in the field of supercapacitor applications.