镍硫化物/碳纳米管复合材料的制备及电化学性能研究

Synthesis and Electrochemical Properties of Nickel Sulfides/CNTs Composites

采用溶剂热法以Ni Cl2·6H2O为镍源,乙醇为溶剂制备Ni/CNTs前驱体,在水热反应条件下,用Na2S2O3·5H2O对Ni/CNTs前驱体进行硫化,得到NS/CNTs复合材料。对其电化学性能进行测试,NS/CNTs复合材料在1 A·g-1电流密度下的比电容可达533.33 F·g-1,经1000次循环充放电后,比电容保持率为42.50%。相较于NS纳米片(146.67 F·g-1和27.27%),NS/CNTs复合材料的电化学性能得到了显著提升,表明CNTs的加入能明显改善镍硫化物的电化学性能。

Firstly,Ni/CNTs precursor was synthesized using Ni Cl2·6H2O as nickel source and ethanol as solvent by solvothermal method.And then in hydrothermal reaction conditions,Ni/CNTs precursor was vulcanized by Na2S2O3·5H2O to successfully obtain NS/CNTs composites.The specific capacitance of NS/CNTs composites reach 533.33 F·g-1at a current density of 1 A·g-1,and 42.50%of the specific capacitance is maintained after 1000 cycles.Compared with NS nanosheets(146.67 F·g-1and 27.27%),the electrochemical properties of NS/CNTs composites have been greatly improved.The results indicate that the addition of CNTs can effectively enhance the electrochemical properties of nickel sulfides.