Preparation and lithium storage performance of C-GQDs/α-Fe2O3 nanocomposites

7^th International Conference on Smart Materials and Structures

July 02-03, 2018 | Vienna, Austria

Yi-ting Chang, Tien-Hao Chang, Su-Jien Lin, Zhang Ya-ting, Zhang Kai-bo, LIU Guo-yang, REN Shao-zhaoJIA Kai-li and QIU Jie-shan

National Natural Science Foundation of China, China

Posters & Accepted Abstracts: J Material Sci Eng

Abstract :

Electrodeposition technology was used to prepare �±-Fe2O3 sheet-shaped nanoflowers (DMF: water=2:1) with morphological structure controllable by adjusting the ratio of electrolyte solvent (DMF and water). Further, a C-GQDs/�±-Fe2O3 composite was prepared by the secondary electrodeposition in which the coal-based graphene quantum dots(C-GQDs) were obtained from Taixi anthracite as electrolyte and �±-Fe2O3 as a working electrode. The electrochemical performance of C-GQDs/�±-Fe2O3 as anode materials for lithium-ion batteries was tested. The results exhibited that the capacity of the composite reached 1582.5 mAh/g at a current density of 1 A/g, and about 1320 mAh/g of reversible capacity remained after 110 cycles. In addition, the composite maintained a capacity of 1091 mAh/g at high current density (5 A/g). The excellent cycling stability and rate performance are attributed to synergistic effect of the good conductivity of C-GQDs and �±-Fe2O3 unique nanostructure distribution. It lays a foundation for the practical application value of lithium ion battery anode technology.