Effect of cobalt incorporation and lithium enrichment in lithium nickel manganese oxides

H. Deng, I. Belharouak, H. Wu, D. Dambournet, K. Amine

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Abstract

Candidate cathode materials of cobalt-incorporated and lithium-enriched Li (1+x) Ni0.25 Co0.15 Mn0.6O (2.175+x/2) (x=0.225-0.65) have been prepared by a coprecipitation method and a solid-state reaction. We systematically investigated the effect of both cobalt presence and lithium concentration on the structure, physical properties, and electrochemical behavior of the studied samples. The electrochemical performance of the cobalt-containing compounds showed much less dependence on the variation in the lithium amounts compared to the cobalt-free counterpart. The study demonstrated that even with cobalt incorporation, proper lithium content is the key to desirable cathode materials with nanostructured primary particles that are indispensable to achieve high capacity and high rate capability and, therefore, both improved energy and power densities for lithium-ion batteries.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume157
Issue number7
DOIs
Publication statusPublished - 10 Jun 2010
Externally publishedYes

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ASJC Scopus subject areas

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

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