Journal
APPLIED SURFACE SCIENCE
Volume 505, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2019.144525
Keywords
Lithium-ion batteries; Dicyandiamide-vapor nitridation; Mass production; Porous Fe3O4@NC networks
Categories
Funding
- National Natural Science Foundation of China [51672146, 21805157]
- Natural Science Foundation of Shandong Province [ZR2019MB037, ZR2019MEM043]
- Project of Shandong Province Higher Educational Science and Technology Program [J15LA12]
- Development Program in Science and Technology of Qingdao [15-9-1-65-jch]
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By virtue of the natural abundance, environmental benignity, and high theoretical capacity, there is an increasing research attention on magnetite micro-/nano-structures serving as alternative anode materials for lithium-ion batteries (LIBs). The facile and efficient synthetic methods are still of urgency and challenging for their mass production. Herein, a low-temperature oxidation accompanied by a dicyandiamide-vapor nitridation strategy is proposed to synthesize ultrathin nitrogen-doped carbon layer wrapping porous magnetite nanoparticle (Fe3O4@NC) networks. As the synthesis approach only contains two-step annealing process and only commercial FeC2O4 center dot 2H(2)O and dicyandiamide are utilized, the as-developed approach is facile, low cost, and could effectively reduce the pollution and enhance the atom economy. When served as anode materials for LIBs, the porous Fe3O4@NC electrodes exhibit superior charge/discharge performances at high current density (847.5 mAh g at 10.0 A g(-1)) and remarkable long-term cycling stability (a high specific capacity of 1125.7 mAh g(-1) remains even after 600 cycles at 1.0 A g(-1)), outperforming most of Fe3O4/carbon-based structures. The as-proposed mass production synthetic method can be expected to pave a new avenue to design high-performance anode materials for various battery applications.
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