Effect of vinylene carbonate as electrolyte additive for Mn2O3/NiMnO3 anodes of lithium-ion batteries

Solmaz R., Karahan B. D.

Ionics, vol.27, no.7, pp.2813-2824, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 27 Issue: 7
  • Publication Date: 2021
  • Doi Number: 10.1007/s11581-021-04044-7
  • Journal Name: Ionics
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC
  • Page Numbers: pp.2813-2824
  • Keywords: Lithium-ion battery, Negative electrode, Electrolyte, Vinylene carbonate, SEI layer
  • Istanbul Medipol University Affiliated: Yes

Abstract

This study reports for the first time the production and characterization of Mn2O3/NiMnO3 (MO/NMO) powders by the hydrothermal method and the enhanced performance of this electrode upon the addition of 15 vol% vinylene carbonate (VC) into the electrolyte. Cyclic voltammetry and electrochemical impedance spectroscopy tests show that the lithiation mechanism of MO/NMO changes upon the presence of VC in the electrolyte. The galvanostatic tests’ results reveal that when half-cells have been tested with 15 vol% VC-containing electrolyte the anode delivers higher discharge capacity (793 mAh g−1 at 100 mA g−1, 535 mAh g−1 at 400 mA g−1) and capacity retention, in comparison to that of the standard electrolyte. Finally, XRD and post-SEM analyses’ outcomes substantiate that the addition of VC into the standard electrolyte promotes the formation of a stable electrode/electrolyte interface. The improved solid electrolyte interface (SEI) properties caused by VC addition prevent any peel off and/or delamination, resulting in high electrochemical performance over cycles.