Effects of synthesis conditions on the physical and electrochemical properties of Li1.2Mn0.54Ni0.13Co 0.13O2 prepared by spray pyrolysis

Miklos Lengyel, Gal Atlas, Dror Elhassid, Peter Y. Luo, Xiaofeng Zhang, Ilias Belharouak, Richard L. Axelbaum

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Abstract

Layered Li1.2Mn0.54Ni0.13Co 0.13O2 materials were synthesized via spray pyrolysis. Synthesis conditions were varied in order to understand their effect on the electrochemical properties of the material. Three process parameters were evaluated: aerosol flow rate, reactor wall temperature and precursor concentration. Electrochemical results show excellent batch-to-batch reproducibility and no non-uniformities, as measured by energy dispersive X-ray spectroscopy (EDX). Phase purity is maintained for all the samples as measured by powder X-ray diffraction (XRD). The primary particle size has the most significant effect on the electrochemical performance of the materials with smaller primary particles promoting electrochemical activation and increasing capacity. Discharge capacities exceeding 200 mAh g-1 after 100 cycles at C/3 rate (where 1C = 200 mAh g-1) are consistently obtained over a wide range of operating conditions. Spray pyrolysis is shown to be a promising, robust synthesis technique for the production of Li 1.2Mn0.54Ni0.13Co0.13O2 material, delivering excellent electrochemical performance within a wide range of process conditions.

Original languageEnglish
Pages (from-to)286-296
Number of pages11
JournalJournal of Power Sources
Volume262
DOIs
StatePublished - Sep 15 2014
Externally publishedYes

Funding

The authors are grateful to the NSF and X-tend Energy LLC for their support and to Howard Wynder for the preparation of microtome images and sections. This work was also supported by the Nano Research Facility (NRF – Grant No. ECS-0335765 ), a member of the National Nanotechnology Infrastructure Network (NNIN), which is supported by the National Science Foundation . Any opinions, findings, conclusions, or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. NRF is part of the School of Engineering and Applied Science at Washington University in St. Louis. RLA and Washington University may receive income based on a license of related technology by the University to X-tend Energy, LLC. The results were partly presented at the 2012 Fall meeting of the Materials Research Society, November 2012 in Boston, MA in poster # J 7.03.

FundersFunder number
Nano Research Facility
National Science Foundation
National Research Foundation of KoreaECS-0335765

    Keywords

    • Layered lithium-nickel-manganese- cobalt-oxides
    • Lithium-ion batteries
    • Primary particle size
    • Spray pyrolysis

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