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Effects of Al doping for Li[Li0.09Mn0.65*0.91Ni0.35*0.91]O2 cathode material

Effects of Al doping for Li[Li0.09Mn0.65*0.91Ni0.35*0.91]O2 cathode material Li-rich Mn-based Li[Li0.09Mn0.65*(0.91 − x) Ni0.35*(0.91 − x) Al x ]O2 cathode materials have been prepared by traditional solid-state reaction. The lattice parameters a, c, and V have decreased, but c/a increased with the increase of Al doping. All the samples show analogy morphology of a quasi-spherical shape. Li[Li0.09Mn0.591Ni0.319]O2 sample shows a higher initial discharge capacity of 239.4 mAh g−1 at 20 mA g−1, while Li[Li0.09Mn0.582Ni0.314Al0.015]O2 sample presents a higher discharge capacity of 170.1 mAh g−1 and ratio of 72.0 % with 200 vs. 20 mA g−1. The solid electrolyte interface resistance (R SEI) and charge transfer process resistance (R ct ) values are relatively smaller for Al-doped samples than those of non-doped samples. Almost no reduction is observed after 24-time cycles in different discharge rates for the samples prepared. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

Effects of Al doping for Li[Li0.09Mn0.65*0.91Ni0.35*0.91]O2 cathode material

Ionics , Volume 19 (11) – Mar 10, 2013

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References (49)

Publisher
Springer Journals
Copyright
Copyright © 2013 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/s11581-013-0881-6
Publisher site
See Article on Publisher Site

Abstract

Li-rich Mn-based Li[Li0.09Mn0.65*(0.91 − x) Ni0.35*(0.91 − x) Al x ]O2 cathode materials have been prepared by traditional solid-state reaction. The lattice parameters a, c, and V have decreased, but c/a increased with the increase of Al doping. All the samples show analogy morphology of a quasi-spherical shape. Li[Li0.09Mn0.591Ni0.319]O2 sample shows a higher initial discharge capacity of 239.4 mAh g−1 at 20 mA g−1, while Li[Li0.09Mn0.582Ni0.314Al0.015]O2 sample presents a higher discharge capacity of 170.1 mAh g−1 and ratio of 72.0 % with 200 vs. 20 mA g−1. The solid electrolyte interface resistance (R SEI) and charge transfer process resistance (R ct ) values are relatively smaller for Al-doped samples than those of non-doped samples. Almost no reduction is observed after 24-time cycles in different discharge rates for the samples prepared.

Journal

IonicsSpringer Journals

Published: Mar 10, 2013

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