Effects of Al³⁺ and Zr⁴⁺ Cations on the Growth of Dendritic Lithium

Abstract:

This study examined the electrochemical deposition and dissolution of lithium on nickel electrodes in propylene carbonate-based electrolytes containing Al³⁺ or Zr⁴⁺ cations as a solid electrolyte interface (SEI)-forming additive. The electrode reactions were significantly affected by the Al³⁺ and Zr⁴⁺ cations. The cyclability of the electrodes was considerably improved in Zr⁴⁺-containing electrolyte solution. Scanning electron microscopy showed that the growth of dendritic lithium was greatly suppressed in the Zr⁴⁺-containing electrolyte solution. On the other hand, electrochemical impedance spectroscopy suggested that a relatively thinner SEI was generated on lithium metal from the Zr⁴⁺-containing electrolyte solution.

• Periodical: Advanced Materials Research (Volume 1119)
• Pages: 585-588
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1119.585
• Online since: July 2015
• Authors: Soon Ki Jeong*
• Keywords: Dendritic Lithium, Impedance, Lithium Batteries, Solid Electrolyte Interphase

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