Unexpected improved performance of ALD coated LiCoO2/graphite li-ion batteries

Yoon Seok Jung, Peng Lu, Andrew S. Cavanagh, Chunmei Ban, Gi Heon Kim, Se Hee Lee, Steven M. George, Stephen J. Harris, Anne C. Dillon

Research output: Contribution to journalArticle

151 Citations (Scopus)

Abstract

The performance of Al2O3atomic layer deposition (ALD) coatings for LiCoO2/ natural graphite (LCO/NG) batteries is investigated, where various permutations of the electrodes are coated in a full battery. Coating both electrodes with - 1 nm of alumina as well as coating only the LCO (positive electrode) enables improved performance when cycling at high voltage, where the LCO is known to degrade. However, we found that coating only the NG (negative electrode) also improves the performance of the whole battery when cycling at high voltage. Under these conditions, the uncoated LCO (positive electrode) should degrade quickly, and the NG should be unaffected. A variety of characterization techniques show the surface reactions that occur on the negative electrode and positive electrode are related, resulting in the enhanced performance of the uncoated LCO.

Original languageEnglish
Pages (from-to)213-219
Number of pages7
JournalAdvanced Energy Materials
Volume3
Issue number2
DOIs
Publication statusPublished - 2013 Feb

All Science Journal Classification (ASJC) codes

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

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