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- Title
Sandwich-structured nanocomposites of N-doped graphene and nearly monodisperse FeO nanoparticles as high-performance Li-ion battery anodes.
- Authors
Qi, Wen; Li, Xuan; Li, Hui; Wu, Weikang; Li, Pei; Wu, Ying; Kuang, Chunjiang; Zhou, Shaoxiong; Li, Xiaolin
- Abstract
Iron oxides have attracted considerable interest as abundant materials for high-capacity Li-ion battery anodes. However, their fast capacity fading owing to poorly controlled reversibility of the conversion reactions greatly hinders their application. Here, a sandwich-structured nanocomposite of N-doped graphene and nearly monodisperse FeO nanoparticles were developed as high-performance Li-ion battery anode. N-doped graphene serves as a conducting framework for the self-assembled structure and controls FeO nucleation through the interaction of N dopants, surfactant molecules, and iron precursors. FeO nanoparticles were well dispersed with a uniform diameter of ~15 nm. The unique sandwich structure enables good electron conductivity and Li-ion accessibility and accommodates a large volume change. Hence, it delivers good cycling reversibility and rate performance with a capacity of ~1,227 mA·h·g and 96.8% capacity retention over 1,000 cycles at a current density of 3 A·g. Our work provides an ideal structure design for conversion anodes or other electrode materials requiring a large volume change.
- Publication
Nano Research, 2017, Vol 10, Issue 9, p2923
- ISSN
1998-0124
- Publication type
Article
- DOI
10.1007/s12274-017-1502-x