Abstract
LiFePO4/C was prepared by wet milling-assisted spray drying. The effects of ball-milling time on the characteristics of LiFePO4/C were investigated by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Brunauer-Emmett-Teller analysis, cyclic voltammograms, electrochemical impedance spectra, and galvanostatic charge–discharge testing. Bowl-like material was obtained, surrounded by a network of carbon, which display larger specific surface area. The specific surface area of particle first increased and then decreased, as the increasing of ball-milling time; when ball-milling time reach 2.5 h, it showed the largest specific surface area of 29.350 m2 g−1, primary particles with size of ∼50 nm, delivered a discharge capacity of 162 mAh g−1 at 0.5 C and 123 mAh g−1 at 10 C, and with no capacity loss.
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The authors appreciate the financial support of the National Natural Science Foundation of China (21366006) and the Nature Science Foundation of Guangxi, China (2011GXNSFA018015).
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Lv, YJ., Su, J., Long, YF. et al. Effect of milling time on the performance of bowl-like LiFePO4/C prepared by wet milling-assisted spray drying. Ionics 20, 471–478 (2014). https://doi.org/10.1007/s11581-013-1002-2
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DOI: https://doi.org/10.1007/s11581-013-1002-2