A heterogeneous NiCo2O4@2D-carbyne nanohybrid - a new electrode material for robust and high energy density hybrid supercapacitors

被引:13
作者
Dhandapani, Preethi [1 ]
Udayakumar, Anandajayarajan [1 ]
Rajendra, Saradh Prasad [2 ]
AlSalhi, Mohamad S. [2 ]
Guo, John Zhanhu [3 ]
Angaiah, Subramania [1 ]
机构
[1] Pondicherry Univ, Ctr Nanosci & Technol, Electromat Res Lab, Pondicherry 605014, India
[2] King Saud Univ, Coll Sci, Dept Phys & Astron, POB 2455, Riyadh 11451, Saudi Arabia
[3] Univ Tennessee Knoxville, Dept Chem & Biomol Engn, Integrated Composites Lab, Knoxville, TN 37996 USA
关键词
BINDER-FREE ELECTRODES; PERFORMANCE; CATALYST;
D O I
10.1039/d3se00218g
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
NiCo2O4 nanoparticles anchored onto 2D-carbyne nanosheets is prepared to use as a new nanohybrid electrode to enhance the capacitive performance of hybrid supercapacitors. The developed heterogeneous nanohybrid takes advantage of 2D-carbyne with high electrical conductivity and NiCo2O4 with a short ion diffusion pathway and hence the synergy between 2D-carbyne and NiCo2O4 enhances the capacitive performance with a specific capacitance of around 1766.7 F g(-1). Furthermore, the hybrid supercapacitor device with a maximum voltage of about 1.7 V is fabricated using NiCo2O4@2D-carbyne and activated carbon as the positive electrode and negative electrode. The hybrid supercapacitor device exhibits a high energy density of 62 W h kg(-1) at a power density of 5.31 kW kg(-1) over 3000 cycles with a capacity retention of about 81%. This outcome provides a new approach to develop hybrid supercapacitors with superior characteristics.
引用
收藏
页码:2368 / 2377
页数:10
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