A simple and universal method for preparing N, S co-doped biomass derived carbon with superior performance in supercapacitors. (20th June 2019)

• Record Type: Journal Article
• Authors: Wang, Bin; Ji, Linlin; Yu, Yanling; Wang, Nuoxin; Wang, Jing; Zhao, Jinbao
• Is Part Of: Electrochimica acta. Volume 309(2019)
• Page Start: 34
• Page End: 43
• Publication Date: 2019-06-20
• Subjects: N, S co-doped carbon -- Biomass derived carbon -- Crop waste -- Supercapacitors; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2019.04.087
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: In this work, N, S co-doped pomelo peel derived carbon is successfully prepared by a simple one-step method. The derived carbon exhibits high specific capacitance (317 F g −1 ) and excellent rate capability (69.7% of capacitance retention at 15 A g −1 ), owing to its large SBET, high heteroatom doping rate and suitable graphitization degree (these characteristics are derived from the synergistic activation and reduction of thiourea dopant). The one-step method is applied to the other two biomasses (bamboo fiber and sugarcane bagasse). The derived carbons of the other two biomasses still show outstanding electrochemical performance due to their similar microstructure and chemical composition to pomelo peel derived carbon, which suggests the universality of the one-step method. The series of carbon materials are applied to symmetric supercapacitors, all of which show high energy density (30.6–24.6 Wh kg −1 ), indicating the potential application of such carbon materials in energy storage. Graphical abstract: Image 1 Highlights: A class of N, S co-doped biomass derived carbon (BDC) is prepared by one-step method. This class of BDCs has a large SBET due to the synergistic activation of thiourea. They also have a high heteroatom doping rate and a suitable graphitization degree. The symmetric supercapacitors based on these BDCs all exhibit high energy density. The one-step method is a universal approach for preparing N, S co-doped BDC.