CuO/KCu_(7)S_(4)复合纳米材料的制备及其超级电容器性能

Synthesis of CuO/KCu_(7)S_(4) Nanocomposite and Its Supercapacitor Performance

采用接替离子层吸附反应(SILAR)沉积法成功地在KCu_(7)S_(4)微米线上沉积CuO纳米片得到CuO/KCu_(7)S_(4)复合纳米材料,并应用于超级电容器的电极。通过对该纳米复合材料表征表明,随沉积次数增加,CuO的含量增加,该CuO为片状结构,均匀地分布于KCu_(7)S_(4)微米线上。在1A/g的电流密度下,沉积次数分别为0、20、40和60的样品比电容分别为10.04、25.52、30.84和40.92F/g。CuO/KCu_(7)S_(4)-60在0.7A/g的电流密度下比电容为47.6F/g,并且在5A/g的电流密度下进行1000次的循环充/放电测试后比电容增加到初始电容的117.29%。

CuO/KCu_(7)S_(4) nanocomposite was successfully obtained by depositing CuO nanosheets on KCu_(7)S_(4) microwires by successive ionic layer adsorption and reaction(SILAR)method,and the nanocomposites were applied to supercapacitor electrode materials.The.nanocom posite was characterized and the characterization results showed that the CuO content of the nanocomposites increased with the increase of the deposition times,and the nanosheets like CuO were distributed on the KCu_(7)S_(4) microwires uniformly.According to the electrochemical performance comparison,the specific capacitance of the samples with the.deposition times of 0,20,40,and 60 was 10.04,25.52,30.84,and 40.92 F/g,respectively,at a current density of 1 A/g.Further electrochemical performance analysis showed that the specific capacitance of CuO/KCu_(7)S_(4)-60 was 47.6 F/g at a current density of 0.7 A/g.And the specific capacitance of CuO/KCu_(7)S_(4)-60 increased to 117.29% of the initial capacitance after 1000 cycles at a current density of 5 A/g.These results indicated that the CuO/KCu_(7)S_(4) nanocomposite have good application potential in the field of supercapacitors.