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Structural and electrochemical properties of LiNi1/3Co1/3Mn1/3O2 material prepared by a two-step synthesis via oxalate precursor

Structural and electrochemical properties of LiNi1/3Co1/3Mn1/3O2 material prepared by a two-step... LiNi1/3Co1/3Mn1/3O2 (LNMCO) powders were formed by a two-step synthesis including preparation of an oxalate precursor by “chimie douce” followed by a solid-state reaction with lithium hydroxide. The product was characterized by TG-DTA, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FTIR), Raman spectroscopy, electron spin resonance (ESR), and SQUID magnetometry. XRD data revealed well-crystallized layered LNMCO with α-NaFeO2-type structure (R-3 m space group). Morphology studied by SEM and TEM shows submicronic particles of 400–800 nm with a tendency to agglomerate. The local structure investigated by vibrational spectroscopy (FTIR, Raman), ESR, and SQUID measurements confirms the well-crystallized lattice with a cation disorder of 2.6% Ni2+ ions in Li(3b) sites. Electrochemical tests were carried out in the potential range 2.5–4.5 V vs. lithium metal on samples heated at 900 °C for 12 h. Initial discharge capacity is 154 mAh/g at C/5, while a capacity of 82 mAh/g is still delivered at 10 C by the two-step synthesized LiNi1/3Co1/3Mn1/3O2 as cathode material. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

Structural and electrochemical properties of LiNi1/3Co1/3Mn1/3O2 material prepared by a two-step synthesis via oxalate precursor

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References (45)

Publisher
Springer Journals
Copyright
Copyright © 2011 by Springer-Verlag
Subject
Chemistry; Condensed Matter Physics; Renewable and Green Energy; Optical and Electronic Materials; Electrochemistry
ISSN
0947-7047
eISSN
1862-0760
DOI
10.1007/s11581-011-0635-2
Publisher site
See Article on Publisher Site

Abstract

LiNi1/3Co1/3Mn1/3O2 (LNMCO) powders were formed by a two-step synthesis including preparation of an oxalate precursor by “chimie douce” followed by a solid-state reaction with lithium hydroxide. The product was characterized by TG-DTA, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FTIR), Raman spectroscopy, electron spin resonance (ESR), and SQUID magnetometry. XRD data revealed well-crystallized layered LNMCO with α-NaFeO2-type structure (R-3 m space group). Morphology studied by SEM and TEM shows submicronic particles of 400–800 nm with a tendency to agglomerate. The local structure investigated by vibrational spectroscopy (FTIR, Raman), ESR, and SQUID measurements confirms the well-crystallized lattice with a cation disorder of 2.6% Ni2+ ions in Li(3b) sites. Electrochemical tests were carried out in the potential range 2.5–4.5 V vs. lithium metal on samples heated at 900 °C for 12 h. Initial discharge capacity is 154 mAh/g at C/5, while a capacity of 82 mAh/g is still delivered at 10 C by the two-step synthesized LiNi1/3Co1/3Mn1/3O2 as cathode material.

Journal

IonicsSpringer Journals

Published: Oct 28, 2011

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