The effect of particle size and morphology on the rate capability of 4.7 V LiMn1.5+δNi0.5-δO4 spinel lithium-ion battery cathodes

M. Kunduraci, Glenn Amatucci

Research output: Contribution to journalArticlepeer-review

155 Scopus citations

Abstract

The electrochemical impact of lithium-ion diffusivity on the discharge rate capabilities of cation ordered (P4332) and disordered (Fd3m) LiMn1.5+δNi0.5-δO4 spinels were studied. Potentiostatic Intermittent Titration (PITT) measurements revealed up to 2 orders-of-magnitude lower lithium diffusion coefficient for the ordered spinel polymorph. The optimum structure of the high voltage spinel is resolved with respect to these ionic studies and our previous electronic transport studies. Modification of the morphology and pore dimensions was accomplished through the tuning of the ethylene glycol used for the synthesis of nanostructured spinel in the modified Pechini process. Glycol will be shown to play a major role on the energy and power density of LiMn1.5+δNi0.5-δO4 electrodes.

Original languageEnglish (US)
Pages (from-to)4193-4199
Number of pages7
JournalElectrochimica Acta
Volume53
Issue number12
DOIs
StatePublished - May 1 2008

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

Keywords

  • Cation ordering
  • Lithium-ion battery
  • Morphology
  • Rate capability
  • Spinel

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