Synthesis of nanospherical Fe3BO6 anode material for lithium-ion battery by the rheological phase reaction method |
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Authors: | Xixi Shi Jutang Sun |
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Institution: | College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P.R. China |
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Abstract: | This paper developed a novel method, the rheological phase reaction method, to synthesize nanospherical Fe3BO6. The sizes and morphologies of products vary with the calcination temperatures. Spherical particles with a uniform size about 40 nm in a monodisperse state were obtained at 800 °C, while the spherical particles with a larger size of 100-500 nm were obtained at 900 °C. The electrochemical properties of these Fe3BO6 nanospheres were investigated. Sample synthesized at 800 °C delivers a high reversible capacity above 500 mAh g−1. Sample synthesized at 900 °C possesses relatively good cycleability with a capacity retaining of 376 mAh g−1 after 10 cycles. The measurement of electrochemical impedance spectra for the first time indicated that smaller Fe3BO6 nanoparticles intend to give higher impedance of solid-electrolyte interface layer and lower charge-transfer impedance after the first discharge. Additionally, it can be speculated that the increase of resistance charge-transfer is the possible reason for the capacity fading during cycling. |
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Keywords: | Lithium-ion battery Fe3Bo6 Nanospherical Rheological phase reaction method Anode material |
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