Journal
NANO ENERGY
Volume 6, Issue -, Pages 173-179Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2014.03.017
Keywords
Nanostructure; LiFePO4/C; Nano Fe2O3; High capacity and high rate; Carbothermal reduction
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Funding
- Jiangsu Province prospective joint research on pilot project [BY2013072-03]
- Grant for State Key Program for Basic Research of China [2013CB632702, 2012CB921503]
- National Natural Science Foundation of China [11134006, 11374149]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- National Laboratory of Solid State Microstructures, Test Foundation of Nanjing University
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Nano LiFePO4/C particles with high capacity and high rate were fabricated by one-step solid-state reaction using nano Fe2O3, LiH2PO4 and sucrose as raw materials. The effect of synthesis temperature on the morphology and the electrochemical performance was investigated. LiFePO4/C materials were characterized by differential scanning calorimetry (DSC) and thermogravimetry (TG), X-ray diffraction (XRD), X-ray photoelectron spectrometry (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and the elemental analyzer. The results show that nano Fe2O3 can reduce and make uniform the LiFePO4 grain size (<100 nm) effectively as well as accelerate the solid-state reaction kinetics which is a convenient way for industrialization. The precursor sintered at 740 degrees C for 5 h exhibits the highest electrochemical capacity (166.9 mAh/g at 0.1 C) and the best rate performance. (C) 2014 Elsevier Ltd. All rights reserved.
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