Preparation and electrochemical properties of nickel–manganese composite sulfide

Nickel–manganese sulfide microspheres were prepared with the electrodepositon method, and the supercapacitive properties of this substance as composite electrode materials were explored. Pretreated nickel foam and thiourea were used as the substrate and sulfur source, respectively. Deposition duration was the main factor affecting the morphology of the material, and the degree of morphological dispersion affected the electrochemical properties. Cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD) techniques were used to investigate the electrochemical properties of the material. The highest specific capacitance was determined to be 2076 F g −1 at 1 A g −1 when the deposition time was 5 min, the thiourea concentration was 0.2 M, the nickel to manganese ratio was 1:3, and the deposition potential was − 1.1 V. The specific capacitance retention of the material was 48.5% after 1000 cycles at a scan rate of 10 mV s −1 .