Neoteric hollow tubular MnS/Co3S4 hybrids as high-performance electrode materials for supercapacitors. (10th September 2021)

• Record Type: Journal Article
• Authors: Fuzhi, Li; Zhen, Chen; Dan, Zhang; Aokui, Sun; Pu, Shi; Jing, Liang; Quanguo, He
• Is Part Of: Electrochimica acta. Volume 390(2021)
• Publication Date: 2021-09-10
• Subjects: Manganese sulfide -- Cobalt sulfide -- Hollow tubular structure -- Supercapacitor; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2021.138893
• Languages: English
• ISSNs: 0013-4686

Abstract

Highlights: A neoteric hybrid MnS/Co3S4 was fabricated by two steps of ion exchange. A less energy consumption and more eco-friendly preparing strategy was proposed. A hollow nanotubular micromorphology was demonstrated. The diameter of nanotube was effectively adjusted by the manganese ion dosage. The hybrid exhibited excellent performance when applied in supercapacitor electrode. Abstract: Transitional metal chalcogenides with remarkable electrochemical performance are recently attracted growing interest as a novel type of material in the field of energy storage. Herein, neoteric hollow nanoscale tubular x-MnS/Co3 S4 ( x = 25, 50, 100, 200, 400) hybrids are achieved by two steps of ion exchange methods applying self-made cobalt chloride carbonate hydroxide (Co(CO3 )0.35 Cl0.20 (OH)1.10 ) as precursor, sodium sulfide nonahydrate as a sulfur resource for anion exchange, and anhydrous manganese chloride as a manganese resource for cation exchange. When used in supercapacitors for the first time, the 200-MnS/Co3 S4 sample manifests excellent electrochemical performance with high specific capacitance (627 Fg −1 at 1 A g − 1 ), exceptional rate capability (73.5% capacity retention from 1 to 50 A g − 1 ), and brilliant cycling stability (93.1% of initial capacity retention for 2000 cycles at 10 A g − 1 ). These results above indicate the great potential of hollow MnS/Co3 S4 nano-tubes in the development of high-performance electrode materials for supercapacitors. Graphical abstract: Image, graphical abstract