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Synthesis, Characterization and Electrochemistry of Cathode Material Li [Li0.2Mn0.54Ni0.13Co0.13]O2 Nanofibers Prepared by Electrospinning for Lithium Ion Batteries
Abstract:
Nanofibers of Li [Li0.2Mn0.54Ni0.13Co0.13]O2 with high crystallinity were easily synthesized by electrospinning. Scanning electron microscopy (SEM) showed that precursor wires were glossy, and the diameters of oxide calcined at 800°C were 50-200 nm. And X-ray diffraction (XRD) exhibited perfect crystal structure. The electrochemical properties of materials with the specific morphology were significantly improved. The first charge/discharge capacity was around 309.3 and 270.2 mAh·g-1 at 25 mA·g-1, and the first coulomb efficiency (87.4%) represented a good efficiency for Li2MnO3-type electrodes. After 20 cycles, discharge capacity was over 200 mAh·g-1 at 25 mA·g-1, and capacity retention was 79.8% at 250 mA·g-1.Owing to its simplicity and applicability, the electrospinning method is an promising method to fabricate high performance Li [Li0.2Mn0.54Ni0.13Co0.13]O2 materials for lithium ion batteries.
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928-932
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December 2013
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© 2014 Trans Tech Publications Ltd. All Rights Reserved
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