High Performance and Enhanced Stability of Mn–Co<sub>3</sub>V<sub>2</sub>O<sub>8</sub> Coral-like Structure for Supercapacitor Applications
Sethuraman Venkatesan, Palanisamy Rajkumar, Govindaraju Radhika, Maalavika S. Iyer, R. Manigandan, Dhilip Kumar Rajaiah, Sivaprakasam Radhakrishnan, Sasikumar Raman, Marimuthu Senthilkumaran, Jin Ho Kim
Abstract
This study explores Mn-doped Co 3 V 2 O 8 as a promising electrode material for high-performance supercapacitors. Mn doping significantly enhances the electrochemical properties of Co 3 V 2 O 8, resulting in improved specific capacitance and cycling stability. Structural characterization reveals a coral-like morphology that increases the active sites and facilitates efficient charge transport and ion diffusion. Electrochemical tests show an impressive specific capacitance of 2352 F g –1 in 2 M KOH at 1 A g –1 . For the assembled MCV5//AC asymmetric supercapacitor device, it has a high capacitance retention of 87.6% and a high Coulombic efficiency of 96% over 5000 cycles. The developed asymmetric MCV5/AC supercapacitor device achieved an energy density of 45 Wh kg –1 and a power density of 750 W kg –1 . These findings establish Mn-doped Co 3 V 2 O 8 as a durable and efficient electrode material, offering valuable insights into the relationship between the morphology and electrochemical performance. This work provides a foundation for the development of advanced materials for sustainable energy storage applications.