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Effects of doping Al on the structure and electrochemical performances of Li[Li0.2Mn0.54Ni0.13Co0.13]O2 cathode materials

Effects of doping Al on the structure and electrochemical performances of... The Li-rich cathode material Li[Li0.2Mn0.54Ni0.13Co0.13]O2 had been successfully synthesized by a carbonate coprecipitation method. The effects of substituting traces of Al element for different transitional metal elements on the crystal structure and surface morphology had been investigated by X-ray diffraction (XRD) and field emission scanning electron microscopy. The results revealed that all the materials showed similar XRD patterns and surface morphology. It was demonstrated that LNCMAl1 exhibited the superior electrochemical performance. The discharge capacity was 265.2 mAh g−1 at 0.1 C and still maintained a discharge capacity of 135.6 mAh g−1 at 5.0 C. The capacity retention could still be 58.2 and 66.8% after 50 cycles at 1.0 and 2.0 C, respectively. Electrochemical impedance spectra results proved that the remarkably improved rate capability and cycling performance could be ascribed to the low charge transfer resistance and enhanced reaction kinetics. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

Effects of doping Al on the structure and electrochemical performances of Li[Li0.2Mn0.54Ni0.13Co0.13]O2 cathode materials

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References (47)

Publisher
Springer Journals
Copyright
Copyright © 2017 by Springer-Verlag GmbH Germany
Subject
Chemistry; Electrochemistry; Renewable and Green Energy; Optical and Electronic Materials; Condensed Matter Physics; Energy Storage
ISSN
0947-7047
eISSN
1862-0760
DOI
10.1007/s11581-017-2269-5
Publisher site
See Article on Publisher Site

Abstract

The Li-rich cathode material Li[Li0.2Mn0.54Ni0.13Co0.13]O2 had been successfully synthesized by a carbonate coprecipitation method. The effects of substituting traces of Al element for different transitional metal elements on the crystal structure and surface morphology had been investigated by X-ray diffraction (XRD) and field emission scanning electron microscopy. The results revealed that all the materials showed similar XRD patterns and surface morphology. It was demonstrated that LNCMAl1 exhibited the superior electrochemical performance. The discharge capacity was 265.2 mAh g−1 at 0.1 C and still maintained a discharge capacity of 135.6 mAh g−1 at 5.0 C. The capacity retention could still be 58.2 and 66.8% after 50 cycles at 1.0 and 2.0 C, respectively. Electrochemical impedance spectra results proved that the remarkably improved rate capability and cycling performance could be ascribed to the low charge transfer resistance and enhanced reaction kinetics.

Journal

IonicsSpringer Journals

Published: Sep 16, 2017

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