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Journal of Materials Science

, Volume 48, Issue 4, pp 1740–1745 | Cite as

Synthesis, size reduction, and delithiation of carbonate-free nanocrystalline lithium nickel oxide

  • Craig Dearden
  • Minghui Zhu
  • Beibei Wang
  • Ricardo H. R. Castro
Article

Abstract

Lithium-based oxide nanoparticles have recently shown significant advantages as cathode materials for lithium ion batteries, showing higher ion exchanging rates related to the high surface area. Among them, LiNiO2 has been considered an attractive candidate due to its relatively low cost, high discharge capacity, reversibility, and low toxicity. However, the synthesis of nanosized LiNiO2 typically favors the formation of Li2CO3 and NiO phases, which critically affect the performance of the cathode nanoparticles. In this work, we describe the synthesis of lithium nickel oxide nanoparticles using a modified polymeric precursor method. As the formation of NiO and Li2CO3 was unavoidable, high temperatures would be required to obtain a carbonate-free LiNiO2. In order to avoid large coarsening of the particles associated with those treatments, samples were treated at lower temperatures and cleaned from surface Li2CO3 contaminants using acidic washing. The procedure successfully removed the carbonate, and also resulted in crystallite size reduction (28.1–15.2 nm) and controlled delithiation, simulating the lithium deficient conditions during electrochemical lithium displacement.

Keywords

Lithium Carbonate Phase Acid Etching Lithium Content Pechini Method 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

This work was supported by the National Science Foundation grant DMR Ceramics 1055504.

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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • Craig Dearden
    • 1
  • Minghui Zhu
    • 1
  • Beibei Wang
    • 1
  • Ricardo H. R. Castro
    • 1
  1. 1.Department of Chemical Engineering and Materials Science & NEAT ORUUniversity of CaliforniaDavisUSA

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