Co-doped amorphous NiMoS4 modified with rGO for high-rate performance and long-cycling stability of hybrid supercapacitors

被引:12
作者
Lu, Yuchen [1 ]
Huang, Bingji [1 ]
Yuan, Jingjing [1 ]
Qiao, Yifan [1 ]
Zhang, Wenyao [2 ]
He, Guangyu [1 ]
Chen, Haiqun [1 ]
机构
[1] Changzhou Univ, Adv Catalysis & Green Mfg Collaborat Innovat Ctr, Jiangsu Key Lab Adv Catalyt Mat & Technol, Changzhou 213164, Jiangsu, Peoples R China
[2] Nanjing Univ Sci & Technol, Key Lab Soft Chem & Funct Mat, Minist Educ, Nanjing 210094, Peoples R China
基金
中国国家自然科学基金;
关键词
REDUCED GRAPHENE OXIDE; BIFUNCTIONAL ELECTROCATALYST; ELECTRODE MATERIAL; EFFICIENT; ARRAYS; COMOS4; FOAM; NI;
D O I
10.1039/d2dt02755k
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The electrochemical performance of hybrid capacitors is seriously affected by the slow charging and discharging of the bulk phase. Here, Co-doped amorphous NiMoS4 modified with reduced graphene oxide (rGO) was prepared by a simple one-step hydrothermal method, and the obtained Co-doped NiMoS4/rGO nanocomposite (Ni1-xCoxMoS4/rGO) exhibits a high specific surface area, realizing the redox reaction from the bulk to the surface. Owing to the doping of Co with abundant redox active sites and the support of rGO sheets with high conductivity and a stable structure, the Ni1-xCoxMoS4/rGO anode assembled with an oxidized needle coke (NCO) cathode shows an excellent energy density of 28.9 W h kg(-1) at a power density of 968.3 W kg(-1). In addition, the hybrid supercapacitor displays a superior cycling performance with a capacity retention of 92.4% after 10 000 cycles. The construction of the Co-doped NiMoS4/rGO nanocomposite provides an effective strategy to boost the activity and stability of amorphous NiMoS4 for high-performance hybrid supercapacitors.
引用
收藏
页码:17820 / 17826
页数:7
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