Journal
CERAMICS INTERNATIONAL
Volume 46, Issue 11, Pages 17478-17485Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2020.04.043
Keywords
Lithium-ion batteries; Fe2O3 nanoparticles; Nitrogen-doped carbon; Honeycomb-like structure; Anode
Categories
Funding
- National Natural Science Foundation of China [21765009, 21964010, 21665012]
- Science and Technology Support Program of Jiangxi Province [20123BBE50104, 20133BBE50008]
- Open Project Program of Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Jiangxi Normal University [KLFS-KF-201919, KLFS-KF-201913]
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N-doped honeycomb-like carbon networks (N-HCN) loaded with ultra-fine Fe2O3 nanoparticles (Fe2O3/N-HCN) are proposed as anode materials for lithium-ion batteries (LIBs). TheFe(2)O(3)/N-HCN nanocomposites are prepared by freeze-drying of glucose-Fe(NO3)(3) solution, following by grinding it with urea, and finally annealing treatment. The N-HCN with dozen micrometer-sized macropores is composed of carbon nanosheets with a thickness of about 33 nm. A large number of 2-7 nm-sized ultra-fine Fe2O3 nanoparticles with an average size of 4.4 nm are uniformly arrayed on the wall of N-HCN. The Fe2O3/N-HCN nanocomposites exhibit good performances as anode materials for LIBs. After 500 cycles under a large current density of 5 A g(-1), the Fe2O3/N-HCN nanocomposites still show a reversible capacity of 408 mAh g(-1). The good performance can be ascribed to the uniformly dispersed ultra-fine Fe2O3 nanoparticles and unique honeycomb-like structure of N-HCN which provides a continuous conducive network to greatly promote the rapid transfer of ions and electrons, and effectively alleviate the volume fluctuation effect of Fe2O3 during charging and discharging. More importantly, the cheap and environmentally friendly glucose as raw materials provides possibility for green energy applications.
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