Design of a novel 3D hierarchical network porous CNS@Ag0.5@Co-180-10/GNPs hetero-nanostructure hybrid as an excellent electrode for supercapacitor. (10th December 2020)

• Record Type: Journal Article
• Authors: Li, Yujin; Yang, Yinhang; Shang, Xueni; Song, Cuimeng; Chen, Jinchao; Li, Yun; Huang, Min; Meng, Fanbin
• Is Part Of: Electrochimica acta. Volume 363(2020)
• Publication Date: 2020-12-10
• Subjects: CNS@Ag0.5@Co-180-10/GNPs -- Designed and fabricated -- Heteroatoms synergistic-doping -- Tuned -- Supercapacitors; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2020.137244
• Languages: English
• ISSNs: 0013-4686

Abstract

Highlights: A novel 3D hierarchical network porous CNS@Ag0.5 @Co-180-10/GNPs hetero-nanostructure hybrid was successfully synthesized using an assistance of nickel foam as a precursor structure-controlling template. The mass ratio of the second metal, hybridized temperature and activated time were verified to be the extremely sensitive parameters, affecting the electrochemical activity of CNS@Ag0.5 @Co precursor. The as-prepared CNS@Ag0.5 @Co-180-10/GNPs sample exhibits large specific surface area, suitable wider mesopores and narrow micropores porosity, and unique morphology. Due to the synergistic effect contribution of multi-compositional features, the CNS@Ag0.5 @Co-180-10/GNPs displays an excellent electrochemical performance with 657.6 F g −1 for specific capacitance at 1 A g −1 and 97.11% for capacitance retention at a current density of 15 A g −1 after 5000 cycles . Abstract: The increasing demands for green sustainable energy have motivated much interest and attention in energy conversion systems. In this work, 3D hierarchical network porous CNS@Ag0.5 @Co-180-10/GNPs hetero-nanostructure hybrid was successfully designed and fabricated via a multistep transformation approach of liquid-phase reduction procedure and subsequent hydrothermal activation pathway, through using a facile heteroatoms synergistic-doping cobalt-based AgCo hybrid and precursor assisted-templating strategy. Here, the chemical compositions, structure parameters and electrochemical performances of C, N, S-tri-doped Ag@Co composites precursor can be simply tuned by adjusting the requirement of Ag content in alloys, hybridization temperature and activation time. It was found that the typical CNS@Ag0.5 @Co-180-10/GNPs material possessed a molar ratio of 0.5:1 of Ag and Co, hybridized at 180 °C and activated for 10 h is endowed with large specific surface area (1370 m 2 g −1 ), suitable porosity (wider mesopores and narrow micropores), unique morphology (porous 3D hierarchical network structure) and outstanding electrochemical performance (657.6 F g −1 at 1 A g −1 for specific capacitance, 97.11% at a current density of 15 A g −1 after 5000 cycles for capacitance retention), providing a new insight to design a promising electrode materials for high-performance supercapacitors. Graphical abstract: Image, graphical abstract