Effect of Interface Modifications on Voltage Fade in 0.5Li2 MnO3 - 0.5LiNi0.375 Mn0.375 Co0.25 O2 Cathode Materials

Ira Bloom, Lynn Trahey, Ali Abouimrane, Ilias Belharouak, Xiaofeng Zhang, Qingliu Wu, Wenquan Lu, Daniel P. Abraham, Martin Bettge, Jeffrey W. Elam, Xiangbo Meng, Anthony K. Burrell, Chunmei Ban, Robert Tenent, Jagjit Nanda, Nancy Dudney

Research output: Contribution to journalArticlepeer-review

88 Scopus Citations

Abstract

The effects of the coatings Al2O3, LiAlOx, ZrO2, TiO2, AlPO4, and LiPON and of the electrolyte additives 3-hexylthiophene and lithium difluoro (oxalato)borate (LiDFOB) on the voltage fade phenomenon in 0.5Li2MnO 3·0.5LiNi0.375Mn0.375Co 0.25O2 cathodes were investigated. Cells containing these materials or additives were cycled according to a standard protocol at room temperature between 2.0 and 4.7 V vs. Li+/Li. As expected, the cells containing either an additive or a coated cathode displayed less capacity loss than cells containing an uncoated cathode and no additive. The voltage fade phenomenon was quantified in terms of changes in the average cell voltage (Wh/Ah). The results indicate that, within experimental error, all of the coatings and additives produced little-to-no effect on voltage fade.

Original languageAmerican English
Pages (from-to)509-514
Number of pages6
JournalJournal of Power Sources
Volume249
DOIs
StatePublished - 1 Mar 2014

NREL Publication Number

  • NREL/JA-5900-60739

Keywords

  • Coatings
  • Composite cathode materials
  • Electrolyte additives
  • Lithium-ion batteries
  • Voltage fade

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