Synthesis of binder-free MgSrS/CNT nanocomposite and measure the electrochemical characteristics of asymmetric supercapacitor

The current study aimed to understand the effects of using binder-free electrodes in comparison with those with PVDF binder on the electrochemical performance of MgSrS/CNT composite for supercapacitors (SCs) electrode. MgSrS composite was produced using a hydrothermal method, and then their physical integration with carbon nanotubes (CNTs) was done to improve their electrochemical characteristics. After that, electrochemical performance measurements were carried out utilizing PVDF and binder-free setups. The binder-free MgSrS/CNT electrodes outperform their binder-containing counterparts with a significant boost in capacity and energy density. The performance of a three-electrode system was assessed, and it was observed that the electrodes composed of binder-free MgSrS/CNT revealed an outstanding capacity of 1130.0 C/g when subjected to testing at 3 mV/s. Overall performance was high in an asymmetric supercapattery configuration, where the positive electrode was made of binder-free MgSrS/CNT. In particular, precise parameters with values of 245.3 C/g for specific capacity, 54.0 Wh/kg for energy density, and 1610.0 W/kg for power density were obtained. Notably, the product displayed exceptional cycling stability, preserving 87.1% of its initial capacity even after 5000 cycles. Binder-free MgSrS/CNT electrodes excel in electrical efficiency due to enhanced electron transport, improved ionic conductivity, greater active site availability, and reduced byproduct formation without N-poly-vinylidene fluoride (PVDF).