一锅溶热法制备适合超级电容器电极的改性NiCo_(2)S_(4)@C材料

Preparation of Modified NiCo_(2)S_(4)@C Materials Suitable for Supercapacitor Electrodes by One-Pot Solvothermal Method

为了使硫化镍钴(NiCo_(2)S_(4))作为超级电容器电极材料获得更高的倍率性能和循环稳定性,添加葡萄糖,通过水热法在核心NiCo_(2)S_(4)上涂覆导电碳层,制备NiCo_(2)S_(4)@C。碳层可以防止NiCo_(2)S_(4)聚集,形成更多的微孔,从而形成相对较大的比表面积。所制备的NiCo_(2)S_(4)@C显示出较好的倍率性能,在1 Ag^(-1)时的比电容为1587.8 Fg^(-1),最高可达1162.5 Fg^(-1)(10 Ag^(-1))。此外,其容量保持率在2000次循环后高达96.2%。

In order to obtain higher multiplicity performance and cycling stability of nickel cobalt sulfide(NiCo_(2)S_(4))as supercapacitor electrode material,NiCo_(2)S_(4)@C was prepared by hydrothermally coating a conductive carbon layer on the core NiCo_(2)S_(4) with the addition of glucose,which prevented the aggregation of NiCo_(2)S_(4) and formed more micropores,resulting in a relatively large specific surface area.The prepared NiCo_(2)S_(4)@C showed a good multiplicative performance with a specific capacitance of 1587.8 Fg^(-1) at 1 Ag^(-1) and up to 1162.5 Fg^(-1)(10 Ag^(-1)).In addition,its capacity retention rate was 96.2%after 2000 cycles.