Improved electrochemical performance of CuS@ graphitic carbon nitride composite for supercapacitor applications

Researchers have focused on fabricating energy storage equipment to tackle global energy concerns. The energy storage systems including capacitors and batteries have several limitation because of their poor electrochemical performance. The electrode material's suitability for supercapacitor depends on its ability to improve electrochemical performance and stability. In this work, CuS@g-CN (graphitic carbon nitride) composite was developed via a hydrothermal approach. Several analytical techniques were utilized to determine performance of the prepared CuS@g-CN composite. The specific capacitance of CuS@g-CN composite was 996 F/g which displayed stability after 10,000th cycles with a retention of 93% calculated from galvanostatic charge-discharge profiles. A charge transfer resistance of 1.18 Omega of CuS@g-CN composite was found relatively lower than individual materials calculated from the Nyquist plot. The nitrogen-rich structure of g-CN permits rapid ion transportation and the presence of multiple transition metals led to improved electrochemical effectiveness. The enhanced characteristics of CuS@g-CN composite render it suitable for incorporation into future energy storage devices.