Composition-tailored synthesis of gradient transition metal precursor particles for lithium-ion battery cathode materials

Gary M. Koenig, Ilias Belharouak, Haixai Deng, Yang Kook Sun, Khalil Amine

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82 Citations (Scopus)

Abstract

We report the tailored synthesis of particles with internal gradients in transition metal composition aided by the use of a general process model. Tailored synthesis of transition metal particles was achieved using a coprecipitation reaction with tunable control over the process conditions. Gradients in the internal composition of the particles was monitored and confirmed experimentally by analysis of particles collected during regularly timed intervals. Particles collected from the reactor at the end of the process were used as the precursor material for the solid-state synthesis of Li 1.2(Mn0.62Ni0.38)0.8O2, which was electrochemically evaluated as the active cathode material in a lithium battery. The Li1.2(Mn0.62Ni0.38) 0.8O2 material was the first example of a structurally integrated multiphase material with a tailored internal gradient in relative transition metal composition as the active cathode material in a lithium-ion battery. We believe our general synthesis strategy may be applied to produce a variety of new cathode materials with tunable interior, surface, and overall relative transition metal compositions.

Original languageEnglish
Pages (from-to)1954-1963
Number of pages10
JournalChemistry of Materials
Volume23
Issue number7
DOIs
Publication statusPublished - 12 Apr 2011
Externally publishedYes

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Keywords

  • cathode
  • Gradient materials
  • lithium-ion battery
  • tailored synthesis
  • transition metal oxide

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemical Engineering(all)
  • Chemistry(all)

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