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Influence of Fe substitution on cycling stability of Li[Li0.2Ni0.13Mn0.54Co0.13]O2 cathode for lithium ion batteries

Influence of Fe substitution on cycling stability of Li[Li0.2Ni0.13Mn0.54Co0.13]O2 cathode for... With an aim to broaden the understanding of factors influencing oxygen loss, reversible capacity, and cyclic stability of lithium-rich layered oxide cathodes for lithium ion batteries, a series of Fe substituted Li[Li0.2Ni0.13Mn0.54Co0.13]O2 samples, Li[Li0.2Ni0.13-x/2Mn0.54-x/2Co0.13Fe x ]O2 (x = 0, 0.02, 0.04, and 0.08) and Li[Li0.2Ni0.13Mn0.54Co0.13-y Fe y ]O2 (y = 0, 0.02, 0.04, and 0.06), have been synthesized with a hydroxide co-precipitation method and comparatively studied with X-ray diffraction (XRD), scanning electron microscope (SEM), and charging/discharging measurements. The results indicate that with increasing the Fe substitution for either Co3+ or [Ni0.5Mn0.5]3+, the oxygen loss during the first charge dramatically decreases, leading to the decrease in reversible capacity. Interestingly, the substitution for Co3+ can significantly suppress the voltage decay of the material with extended cycling. For instance, the decayed voltage in 30 cycles is 0.21 V for Li[Li0.2Ni0.13Mn0.54Co0.13]O2, while only 0.11 V for Li[Li0.2Ni0.13Mn0.54Co0.07Fe0.06]O2. The suppression mechanism is discussed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

Influence of Fe substitution on cycling stability of Li[Li0.2Ni0.13Mn0.54Co0.13]O2 cathode for lithium ion batteries

Ionics , Volume 21 (7) – Feb 13, 2015

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References (44)

Publisher
Springer Journals
Copyright
Copyright © 2015 by Springer-Verlag Berlin Heidelberg
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/s11581-015-1379-1
Publisher site
See Article on Publisher Site

Abstract

With an aim to broaden the understanding of factors influencing oxygen loss, reversible capacity, and cyclic stability of lithium-rich layered oxide cathodes for lithium ion batteries, a series of Fe substituted Li[Li0.2Ni0.13Mn0.54Co0.13]O2 samples, Li[Li0.2Ni0.13-x/2Mn0.54-x/2Co0.13Fe x ]O2 (x = 0, 0.02, 0.04, and 0.08) and Li[Li0.2Ni0.13Mn0.54Co0.13-y Fe y ]O2 (y = 0, 0.02, 0.04, and 0.06), have been synthesized with a hydroxide co-precipitation method and comparatively studied with X-ray diffraction (XRD), scanning electron microscope (SEM), and charging/discharging measurements. The results indicate that with increasing the Fe substitution for either Co3+ or [Ni0.5Mn0.5]3+, the oxygen loss during the first charge dramatically decreases, leading to the decrease in reversible capacity. Interestingly, the substitution for Co3+ can significantly suppress the voltage decay of the material with extended cycling. For instance, the decayed voltage in 30 cycles is 0.21 V for Li[Li0.2Ni0.13Mn0.54Co0.13]O2, while only 0.11 V for Li[Li0.2Ni0.13Mn0.54Co0.07Fe0.06]O2. The suppression mechanism is discussed.

Journal

IonicsSpringer Journals

Published: Feb 13, 2015

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