Khemii O. Synthesis, structure and physicochemical properties of carbon / molybdenum sulphide, nickel hydroxide nanocomposites

The paper presents results of investigations of the crystal structure, morphology, optical and electrical properties of molybdenum sulfide, nickel hydroxide and their composites with nanoporous carbon. The influence of the synthesis conditions, the laser radiation and ultrasonic dispersion on electrochemical characteristics of the materials was found. As a result of experiments it was found that with increasing carbon content in the MoS2 / C composite, parameter c increases. The value of the specific surface area of the b-Ni(OH)2/C composite increases twice as compared to the original material after ultrasonic dispersion. This is due to the low degree of agglomeration and formation of nickel hydroxide nanoflakes. The nature of flow fast redox reactions was established, which depending of the b-Ni(OH)2 / C composite content. It is shown that with increasing content of nickel hydroxide their intensity increases. It was found that the optimal carbon content in composites is 10% by weight. The specific capacity reaches maximum value of 554 F/g for b-Ni(OH)2/C composite under ultrasound radiation. The electrochemical properties of nanoporous carbon / nickel hydroxide and nanoporous carbon / molybdenum sulfide composite were studied as electrode materials for hybrid supercapacitors. It was found that the addition of nanoporous carbon contributes to the stabilization of Coulomb efficiency.