Microporous α‐Fe <sub>2</sub> O <sub>3</sub> @NiO Heterostructures Synthesized for Enhanced Supercapacitor Performance
Sujit A. Kadam, Komal Prakash Kadam, Carlo C. Sta. Maria, Yuan‐Ron Ma, Avinash C. Molane, Sumit A. Lolage, V. B. Patil, P. D. More
Abstract
Abstract In this present research, we synthesized pure α‐Fe 2 O 3 , NiO, and a microporous α‐Fe 2 O 3 @NiO heterostructure electrode via the spray pyrolysis method. The microporous α‐Fe 2 O 3 @NiO heterostructure electrode, with its highly porous structure, offers a larger electrode‐electrolyte interface, which results in improved electrochemical performance. Specifically, the microporous heterostructure exhibited a higher specific capacitance of 530.87 F/g at a current density of 7 mA/cm 2 in a 1 M NaOH electrolyte, as compared to α‐Fe 2 O 3 (187.12 F/g at 7 mA/cm 2 ) and NiO (492.69 F/g at 7 mA/cm 2 ). The microporous α‐Fe 2 O 3 @NiO heterostructures exhibited significantly enhanced electrochemical performance as compared to the individual α‐Fe 2 O 3 and NiO samples, owing to the synergistic effect of the heterostructure. Furthermore, the microporous α‐Fe 2 O 3 @NiO heterostructure exhibited high specific capacitances and exceptional cycling stability for more than 2000 cycles, indicating their potential as excellent electrode for supercapacitor devices.