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- Title
Proline-derived in situ synthesis of nitrogen-doped porous carbon nanosheets with encaged FeO@FeC nanoparticles for lithium-ion battery anodes.
- Authors
Zhang, Jingfei; Qi, Lijuan; Zhu, Xiaoshu; Yan, Xiaohong; Jia, Yufeng; Xu, Lin; Sun, Dongmei; Tang, Yawen
- Abstract
The homogeneous incorporation of heteroatoms into two-dimensional C nanostructures, which leads to an increased chemical reactivity and electrical conductivity as well as enhanced synergistic catalysis as a conductive matrix to disperse and encapsulate active nanocatalysts, is highly attractive and quite challenging. In this study, by using the natural and cheap hydrotropic amino acid proline-which has remarkably high solubility in water and a desirable N content of ~12.2 wt.%-as a C precursor pyrolyzed in the presence of a cubic KCl template, we developed a facile protocol for the large-scale production of N-doped C nanosheets with a hierarchically porous structure in a homogeneous dispersion. With concomitantly encapsulated and evenly spread FeO nanoparticles surrounded by two protective ultrathin layers of inner FeC and outer onion-like C, the resulting N-doped graphitic C nanosheet hybrids (FeO@FeC-NGCNs) exhibited a very high Li-storage capacity and excellent rate capability with a reliable and prolonged cycle life. A reversible capacity as high as 857 mAh•g at a current density of 100 mA•g was observed even after 100 cycles. The capacity retention at a current density 10 times higher-1,000 mA•g-reached 680 mAh•g, which is 79% of that at 100 mA•g, indicating that the hybrids are promising as anodes for advanced Li-ion batteries. The results highlight the importance of the heteroatomic dopant modification of the NGCNs host with tailored electronic and crystalline structures for competitive Li-storage features.
- Publication
Nano Research, 2017, Vol 10, Issue 9, p3164
- ISSN
1998-0124
- Publication type
Article
- DOI
10.1007/s12274-017-1533-3