Preparation of coal-based graphene quantum dots/α-Fe2O3 nanocomposites and their lithium-ion storage properties. (1st April 2019)

• Record Type: Journal Article
• Authors: Zhang, Yating; Zhang, Kaibo; Jia, Kaili; Liu, Guoyang; Ren, Shaozhao; Li, Keke; Long, Xueying; Li, Meng; Qiu, Jieshan
• Is Part Of: Fuel. Volume 241(2019)
• Page Start: 646
• Page End: 652
• Publication Date: 2019-04-01
• Subjects: α-Fe2O3 -- GQDs -- Coal -- Lithium-ion battery -- Anode material; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2018.12.030
• Languages: English
• ISSNs: 0016-2361

Abstract

Abstract: Nano-Fe2 O3 particles on a nickel substrate have been obtained by electrodeposition technique adjusting the ratio of electrolyte solvent (DMF and water), and then it was used as the working electrode to obtain the C-GQDs/α-Fe2 O3 composite material via second-step electrodeposition with the coal-based graphene quantum dots (C-GQDs) solution which had been prepared from Taixi anthracite powder as the electrolyte. The lithium-ion storage performance of C-GQDs/α-Fe2 O3 composites as the anode in the lithium-ion battery was studied, and the results show that the composites exhibited excellent cyclability and rate capability. When the current density was 1 A/g, the specific capacitance of C-GQDs/α-Fe2 O3 composites was up to 1582.5 mAh/g, and it could maintain 1320 mAh/g after 110 cycles. The specific capacitance was 1091 mAh/g at a high current density (5 A/g).