Synthesises,characterizations and electrochemical properties of spherical-like LiFePO4 by hydrothermal method |
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Authors: | Zhongli Wang Shaorui SuChunyang Yu Yu ChenDingguo Xia |
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Affiliation: | College of Environmental and Energy Engineering, Beijing University of Technology, Pingleyuan 100, Chaoyang District, Beijing 100022, China |
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Abstract: | Spherical-like LiFePO4 was synthesized by hydrothermal synthesis method using Phenanthroline as a complexing-agent to avoid the Fe(II) ions from oxidation and control the growth of the crystal. Structural, electron valence state, morphology and particle size were investigated by X-ray diffraction (XRD), X-ray photoelectron spectra (XPS), Mössbauer spectra, scanning electron microscopy (SEM) and laser particle sizer. Charge–discharge cycling performances were used to characterize its electrochemical properties. The sample possesses uniformly distributed spherical-like particles with an average size of 0.5–1 μm. Test shows that the reversible capacity of spherical-like LiFePO4 is about 140 mAh g−1 at 0.1 C. The capacity fading is neglectable. |
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Keywords: | LiFePO4 Hydrothermal Complexing-agent XPS Mö ssbauer spectra |
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