From Surface ZrO2 Coating to Bulk Zr Doping by High Temperature Annealing of Nickel-Rich Lithiated Oxides and Their Enhanced Electrochemical Performance in Lithium Ion Batteries

Florian Schipper, Hana Bouzaglo, Mudit Dixit, Evan M. Erickson, Tina Weigel, Michael Talianker, Judith Grinblat, Larisa Burstein, Michael Schmidt, Jordan Lampert, Christoph Erk, Boris Markovsky, Dan Thomas Major, Doron Aurbach

Research output: Contribution to journalArticlepeer-review

340 Scopus citations

Abstract

One of the major hurdles of Ni-rich cathode materials Li1+x(NixCozMnz)wO2, y > 0.5 for lithium-ion batteries is their low cycling stability especially for compositions with Ni ≥ 60%, which suffer from severe capacity fading and impedance increase during cycling at elevated temperatures (e.g., 45 °C). Two promising surface and structural modifications of these materials to alleviate the above drawback are (1) coatings by electrochemically inert inorganic compounds (e.g., ZrO2) or (2) lattice doping by cations like Zr4+, Al3+, Mg2+, etc. This paper demonstrates the enhanced electrochemical behavior of Ni-rich material LiNi0.8Co0.1Mn0.1O2 (NCM811) coated with a thin ZrO2 layer. The coating is produced by an easy and scalable wet chemical approach followed by annealing the material at ≥700 °C under oxygen that results in Zr doping. It is established that some ZrO2 remains even after annealing at ≥800 °C as a surface layer on NCM811. The main finding of this work is the enhanced cycling stability and lower impedance of the coated/doped NCM811 that can be attributed to a synergetic effect of the ZrO2 coating in combination with a zirconium doping.

Original languageEnglish
Article number1701682
JournalAdvanced Energy Materials
Volume8
Issue number4
DOIs
StatePublished - 5 Feb 2018

Keywords

  • cathodes
  • lithium-ion batteries
  • nickel-rich materials
  • zirconia coating
  • zirconium doping

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science (all)

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