Growth of ambient induced surface impurity species on layered positive electrode materials and impact on electrochemical performance

Nicholas V. Faenza, Lejandro Bruce, Zachary W. Lebens-Higgins, Irene Plitz, Nathalie Pereira, Louis F.J. Piper, Glenn Amatucci

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Surface impurity species, most notably Li2CO3, that develop on layered oxide positive electrode materials with atmospheric aging have been reported to be highly detrimental to the subsequent electrochemical performance. LiNi0.8Co0.15Al0.05O2 (NCA) was used as a model layered oxide compound to evaluate the growth and subsequent electrochemical impact of H2O, LiHCO3, LiOH and Li2CO3. Methodical high temperature annealing enabled the systematic removal of each impurity specie, thus permitting the determination of each specie's individual effect on the host material's electrochemical performance. Extensive cycling of exposed and annealed materials emphasized the cycle life degradation and capacity loss induced by each impurity, while rate capability measurements correlated the electrode impedance to the impurity species present. Based on these characterization results, this work attempts to clarify decades of ambiguity over the growth mechanisms and the electrochemical impact of the specific surface impurity species formed during powder storage in various environments.

Original languageEnglish (US)
Pages (from-to)A3727-A3741
JournalJournal of the Electrochemical Society
Volume164
Issue number14
DOIs
StatePublished - Jan 1 2017

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Impurities
Electrodes
Oxides
Powders
Life cycle
Aging of materials
Annealing
Degradation
Temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Renewable Energy, Sustainability and the Environment

Cite this

Faenza, Nicholas V. ; Bruce, Lejandro ; Lebens-Higgins, Zachary W. ; Plitz, Irene ; Pereira, Nathalie ; Piper, Louis F.J. ; Amatucci, Glenn. / Growth of ambient induced surface impurity species on layered positive electrode materials and impact on electrochemical performance. In: Journal of the Electrochemical Society. 2017 ; Vol. 164, No. 14. pp. A3727-A3741.
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Growth of ambient induced surface impurity species on layered positive electrode materials and impact on electrochemical performance. / Faenza, Nicholas V.; Bruce, Lejandro; Lebens-Higgins, Zachary W.; Plitz, Irene; Pereira, Nathalie; Piper, Louis F.J.; Amatucci, Glenn.

In: Journal of the Electrochemical Society, Vol. 164, No. 14, 01.01.2017, p. A3727-A3741.

Research output: Contribution to journalArticle

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