Facile synthesis of NiFe2O4 nanoparticle with carbon nanotube composite electrodes for high-performance asymmetric supercapacitor

The supercapacitor (SCs) is being developed as a cost-effective and efficient energy storage device. Any synergistic impact on binary metal oxide with a CNT composite has been regarded as the desired technique to increase energy storage in recent studies. Herein, we prepared spinel NiFe 2 O 4 enclosed carbon nanotube (CNT) nanocomposites using chemical approach. The physiochemical characteristics of the prepared NiFe 2 O 4 /CNT nanocomposite and NiFe 2 O 4 nanoparticle were studied using a variable of analytical techniques. The spinel NiFe 2 O 4 /CNT nanocomposite and NiFe 2 O 4 nanoparticle modified electrode were then examined in a 2 M KOH electrolyte using a three-electrode setup. In particular, the specific capacitance of the spinel NiFe 2 O 4 /CNT nanocomposite modified single electrode was 670 F g −1 (CV) and 343 F g −1 (GCD) with retention of 89.16% after 5000 cycles, respectively. Furthermore, the specific capacitance of the spinel NiFe 2 O 4 /CNT nanocomposite as a cathode and activated carbon as an anode of a two-electrode device was 118.36 F g −1 (CV) and 85.93 F g −1 (GCD), respectively, with an energy density of 23.39 W h kg −1 vs. power density of 466.66 W kg −1 . Then the CNT improves the energy storage activity of NiFe 2 O 4 nanocomposite exhibit through exchange stabilization of energy storage performance. The CNT then boosts the energy storage activity of the NiFe 2 O 4 composite show excellent energy storage performance. • The spinel NiFe 2 O 4 /CNT nanocomposite were synthesized a simple chemical synthesis method. • The excellent specific capacitance of NiFe 2 O 4 /CNT nanocomposite exhibit 670 F g −1 (CV) and 343 F g −1 (GCD). • NiFe 2 O 4 /CNT nanocomposite show the retention of 89.16% from 5000 cycle. • NiFe 2 O 4 /CNT//AC device exhibit 118.36 F g −1 (CV) and 85.93 F g −1 (GCD). • NiFe 2 O 4 /CNT//AC exhibit the energy density of 23.39 W h kg −1 vs. power density of 466.66 W kg −1 .