High-performance supercapacitors: electrochemical insights into CoP/MXene nanomaterial performance

Abstract

This research details the successful synthesis of a CoP/MXene nanomaterial, characterized by unique rod-like structures and MXene layers. In a three-electrode system, the nanomaterial exhibits outstanding electrochemical performance, achieving a specific capacitance of 637 F g⁻¹. When integrated into a supercapacitor device, it demonstrates highly advantageous characteristics, confirming its potential for diverse industrial applications. The device displays confirmed battery-type behavior, coupled with efficient diffusive and capacitive performance, resulting in a specific capacitance of 94.4 F g⁻¹. Notably, the device showcases impressive energy density and power density values, measuring 29.5 W h kg⁻¹ at 750 W kg⁻¹, emphasizing its suitability for robust industrial applications. The rate capability is evident, as illustrated by the sustained distorted rectangular shape in the cyclic voltammetry plots at varying scan rates.