Fabrication of nickel cobalt bimetallic sulfide doped graphite carbon nanohybrids as electrode materials for supercapacitors

doi:10.1016/j.diamond.2022.108955

	Fabrication of nickel cobalt bimetallic sulfide doped graphite carbon nanohybrids as electrode materials for supercapacitors
	Liu, Bing-Lu; Ma, Ying-Xia; Wang, Jia-Wei; Kang, Xiao-Ya; He, Ling-Juan; Lei, Lei; Ran, Fen
刊名	Diamond and Related Materials
	2022-04-01
卷号	124
关键词	Activated carbon Cobalt compounds Crosslinking Electric discharges Electrochemical electrodes Fabrication Graphite Metal ions Metal nanoparticles Nanostructured materials Nickel compounds Nitrates Sodium Sodium alginate Transition metals Bimetallics Carbon material Carbon source Electrode material Graphite carbon Graphite carbon nanohybrid Nanohybrids Nickel cobalt bimetallic sulphide Specific capacities Transition metal ions
ISSN号	0925-9635
DOI	10.1016/j.diamond.2022.108955
英文摘要	A series of nickel cobalt bimetallic sulfide doped graphite carbon (NCBS/C) nanohybrids were fabricated by cross linking reaction, vacuum freeze-drying, heat treatment and hydrothermal method using sodium alginate (SA) as carbon source, nickel nitrate hexahydrate (Ni(NO3)2·6H2O) and cobalt nitrate hexahydrate (Co(NO3)2·6H2O) as transition metal ions source, thiourea as sulfur source. The electrochemical properties of the NCBS/C nanohybrids as electrode materials could be tuned by adjusting the composition. The results show that the NCBS/C nanohybrid fabricated at the molar ratio of Ni(NO3)2·6H2O to Co(NO3)2·6H2O of 1:1, and the thiourea amount of 0.1 g had the optimal electrochemical properties, the specific capacity was 742.9C g−1 at 1 A g−1, when the current density increased from 0.5 A g−1 to 5 A g−1, the specific capacity could remain 98.2%. The asymmetric supercapacitor assembled by the NCBS/C nanohybrid as the positive electrode, activated carbon as the negative electrode delivered energy density of 53.00 Wh kg−1 at power density of 850 W kg−1, and still maintained 43.57 Wh kg−1 at 4.24 kW kg−1. Moreover, the device had 83.78% capacitance retention after 5000 charge-discharge cycles at 5 A g−1. The nanohybrids with high electrochemical properties could be attributed that the transition metal ions as cross-linking agents were well dispersed in the SA hydrogels as carbon source, resulting in that the in-situ formed nickel cobalt bimetallic sulfide nanoparticles were uniformly doped in graphite carbon materials. The strategy could be applied to fabricate other transition metals compounds doped carbon materials for the development of other high-performance electrode materials. © 2022
语种	英语
出版者	Elsevier Ltd
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158068]
专题	材料科学与工程学院
作者单位	State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, School of Materials Science & Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Liu, Bing-Lu,Ma, Ying-Xia,Wang, Jia-Wei,et al. Fabrication of nickel cobalt bimetallic sulfide doped graphite carbon nanohybrids as electrode materials for supercapacitors[J]. Diamond and Related Materials,2022,124.
APA	Liu, Bing-Lu.,Ma, Ying-Xia.,Wang, Jia-Wei.,Kang, Xiao-Ya.,He, Ling-Juan.,...&Ran, Fen.(2022).Fabrication of nickel cobalt bimetallic sulfide doped graphite carbon nanohybrids as electrode materials for supercapacitors.Diamond and Related Materials,124.
MLA	Liu, Bing-Lu,et al."Fabrication of nickel cobalt bimetallic sulfide doped graphite carbon nanohybrids as electrode materials for supercapacitors".Diamond and Related Materials 124(2022).