3D carbon coated NiCo2S4 nanowires doped with nitrogen for electrochemical energy storage and conversion

Zhang, JianfangJianfangZhangZhu, TianyuTianyuZhuWang, YanYanWangCui, JiewuJiewuCuiSun, JianJianSunYan, JianJianYanQin, YongqiangYongqiangQinZhang, YongYongZhangWu, JingjieJingjieWuTiwary, Chandra SekharChandra SekharTiwaryAjayan, Pulickel M.Pulickel M.AjayanWu, YuchengYuchengWu2025-08-312025-08-312019-11-1510.1016/j.jcis.2019.08.0872-s2.0-85071398078https://d8.irins.org/handle/IITG2025/2314031473535Three-dimensional (3D) carbon-coated NiCo<inf>2</inf>S<inf>4</inf> nanowires structures doped with nitrogen are used for energy storage and conversions. The nitrogen doping in both the carbon layer and NiCo<inf>2</inf>S<inf>4</inf> nanowires enhances the electrochemical performances. Here, an easily scalable and simple temperature treatment has been used to decorate carbon-coated NiCo<inf>2</inf>S<inf>4</inf> nanowires with nitrogen doping (N–C@NiCo<inf>2</inf>S<inf>4</inf> NWs) in 3D carbon architecture (carbon cloth). Benefiting from the nitrogen doping and ultrathin carbon layer, the as-prepared 3D N–C@NiCo<inf>2</inf>S<inf>4</inf> NWs electrode exhibits the superior electrochemical performance for both asymmetric supercapacitor and electrocatalytic water splitting. An asymmetric supercapacitor assembled by the N–C@NiCo<inf>2</inf>S<inf>4</inf> NWs and active carbon electrodes achieves a high energy density of 1.72 mWh cm−3 (68.87 Wh kg−1) under a power density of 10.63 mW cm−3 (425 W kg−1) with 90.1% retention of initial capacitance after 10,000 cycles. When employed as the electrocatalyst, the N–C@NiCo<inf>2</inf>S<inf>4</inf> NWs show high activities towards electrocatalytic water splitting.falseCarbon layer | Electrocatalytic water splitting | NiCo2S4 nanowires | Nitrogen doping | Supercapacitor3D carbon coated NiCo2S4 nanowires doped with nitrogen for electrochemical energy storage and conversionArticle10957103449-45715 November 201939arJournal44