Preparation of yolk–shell Fe3O4@N-doped carbon nanocomposite particles as anode in lithium ion batteries

• Published in: Journal of materials science. Materials in electronics Vol. 28; no. 16; pp. 11569 - 11575
• Main Authors: Yang, Ting-Ting, Zhu, Wen-Kai, Liu, Wei-Liang, Kong, Fan-Gong, Ren, Man-Man, Liu, Qin-Ze, Yang, Zhi-Zhou, Wang, Xin-Qiang, Duan, Xiu-Lan
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.08.2017; Springer Nature B.V
• Subjects: Anodes; Carbon; Characterization and Evaluation of Materials; Chemistry and Materials Science; Current density; Electrical resistivity; Electrode materials; Iron oxides; Lithium; Lithium-ion batteries; Materials Science; Melamine; Melamine formaldehyde resins; Nanocomposites; Optical and Electronic Materials; Rechargeable batteries; Structural stability; Fe3O4; Fe3O4 Particle; Anode Material; Electrochemical Performance; Solid Electrolyte Interface
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-017-6957-8

The yolk–shell-structured Fe 3 O 4 nanocomposite particles (Fe 3 O 4 @Void@C – N NPs) with Fe 3 O 4 as the yolk and N - doped carbon as the shell were prepared by using melamine formaldehyde resin as the N and C sources. When used as anode material for lithium ion battery, the yolk–shell structure could not only afford adequate void to accommodate the large volume change during charge/discharge process but also improve structural stability and electrical conductivity. The anode material demonstrated superior long-term and high-rate performance because of the novel structure and the N-doped carbon shell with mesopore. Thus, Fe 3 O 4 @Void@C–N NPs exhibited a high reversible capacity of 1530 mAh g −1 after 300 cycles at a current density of 500 mA g −1 , which were approximately 1.5 and 6 times higher than Fe 3 O 4 @C–N NPs and pure Fe 3 O 4 particles, respectively. Even at the higher current density of 2000 mA g −1 , the reversible capacity remained at 651 mAh g −1 after 500 cycles.