Enhanced stability of LiCoO2 cathodes in lithium-ion batteries using surface modification by atomic layer deposition

Yoon S. Jung, Andrew S. Cavanagh, Anne C. Dillon, Markus D. Groner, Steven M. George, Se Hee Lee

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Ultrathin atomic layer deposition (ALD) coatings were found to enhance the performance of lithium-ion batteries (LIBs). Previous studies have demonstrated that LiCoO2 cathode powders coated with metal oxides with thicknesses of ~100-1000 Å grown using wet chemical techniques improved LIB performance. In this study, LiCoO2 powders were coated with conformal Al2O3 ALD films with thicknesses of only ~3-4 Å established using 2 ALD cycles. The coated LiCoO2 powders exhibited a capacity retention of 89% after 120 charge-discharge cycles in the 3.3-4.5 V (vs. Li/Li+) range. In contrast, the bare LiCoO2 powders displayed only a 45% capacity retention. This dramatic improvement may result from the ultrathin Al2O3 ALD film acting to minimize Co dissolution or to reduce surface electrolyte reactions.

Original languageEnglish
Pages (from-to)61-65
Number of pages5
JournalJournal of the Korean Ceramic Society
Volume47
Issue number1
DOIs
Publication statusPublished - 2010 Jan 31

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites

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