Cornlike ordered N-doped carbon coated hollow Fe3O4 by magnetic self-assembly for the application of Li-ion battery

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2019-01, Vol.356, p.746-755
• Main Authors: Wang, Yang, Chen, Lei, Liu, Huatao, Xiong, Zhenmin, Zhao, Long, Liu, Shenghong, Huang, Chunmao, Zhao, Yanming
• Format: Article
• Language: English
• Subjects: Anode; Fe3O4; Li-ion battery; Magnetic self-assembly
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2018.09.015

[Display omitted] •Cornlike structure was successfully prepared by magnetic self-assembly.•OH-Fe3O4@NC presents high capacity and excellent rate performance.•Successive carbon shell is beneficial for providing high electronic conductivity.•Cornlike structure buffer the volume expansion during cycling. Cornlike ordered N-doped carbon coated hollow Fe3O4 (OH-Fe3O4@NC) composites are prepared through a facile strategy. The unique structure is composed of hundreds of N-doped carbon coated hollow Fe3O4 nanospheres. Successive carbon shell and hollow structure address the irreversibility issue of Fe3O4-based electrodes. Owing to the unique cornlike ordered structure, the as-prepared OH-Fe3O4@NC composites exhibit appealing electrochemical performance as anode materials for lithium-ion batteries (LIBs). It delivers a high reversible capacity of 1316 mA h g−1 at 0.1 A g−1 after 50 cycles and a remarkable rate performance (725, 551 and 361 mA h g−1 at 1, 4, and 10 A g−1, respectively). Our results demonstrate that the OH-Fe3O4@NC composites are the promising anode materials with high capacity for next generation LIBs.