Electrochemical analysis of the effect of Cr coating the LiV 3O8 cathode in a lithium ion battery with a lithium powder anode

Jae Ha Lee, Jun Kyu Lee, Woo Young Yoon

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Rechargeable 2032-coin-type cells were produced with Li-powder anodes (i.e., Li-powder electrodes, LPEs) and either Cr-coated lithium trivanadate (Li1+xV3O8, LVO) cathodes or uncoated LVO cathodes. The initial discharge capacity of a cell with an LPE and a Cr-coated LVO cathode (Cellcoated) was 252 mAh g-1 at a 0.2 C-rate and that of a cell with an LPE and an uncoated LVO cathode (Cellbare) was 223 mAh g-1. After the 50th cycle, Cellcoated exhibited higher capacity retention (about 89%) than Cellbare (about 78%). Changes in the surface morphology of the Cr-coated LVO cathode were observed using scanning electron microscopy and energy-dispersive X-ray spectroscopy. The change in the electrical conductivity of the cell was measured using the impedance analysis. The electrochemical properties of the cells were also evaluated based on the differential capacity curve, voltage profiles, and capacity versus number of cycles.

Original languageEnglish
Pages (from-to)7058-7064
Number of pages7
JournalACS Applied Materials and Interfaces
Volume5
Issue number15
DOIs
Publication statusPublished - 2013 Aug 14

Keywords

  • chromium coating
  • coating effect
  • lithium ion battery
  • lithium metal powder
  • lithium trivanadate

ASJC Scopus subject areas

  • Materials Science(all)

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