Electrodeposited Na2VOx[Fe(CN)6] films As a Cathode Material for Aqueous Na-Ion Batteries

Bianca Paulitsch, Jeongsik Yun, Aliaksandr S. Bandarenka

Research output: Contribution to journalArticlepeer-review

72 Scopus citations

Abstract

The so-called Prussian blue analogues (PBAs) are spotlighted as promising cathode materials for aqueous Na-ion batteries regarding their good performance for the application in future large-scale energy storage systems. In this work, we demonstrate that one of the PBA representatives, namely Na2VOx[Fe(CN)6] thin films (VHCFs), is a promising cathode material for aqueous Na-ion batteries with very positive intercalation/deintercalation potentials, which might likely designate a new benchmark in the field. To maximize the material utilization, we have formed VHCF thin films on model current collectors from aqueous solutions. The resulting films demonstrated a very positive half-charge potential (ΔE1/2 ≈ 0.91 V vs Ag/AgCl reference electrode) in acidic media with a specific capacity of ∼80 mAh g-1 recorded at high C-rates (30 C) in 1 M LiNO3, 3 M NaNO3 and 3 M KNO3 electrolytes in the presence of 3.6 M H2SO4. It is also shown that well-known solvation effects related to the nature of the alkali metal cations during intercalation and deintercalation are surprisingly not pronounced in the case of VHCFs.

Original languageEnglish
Pages (from-to)8107-8112
Number of pages6
JournalACS Applied Materials and Interfaces
Volume9
Issue number9
DOIs
StatePublished - 8 Mar 2017

Keywords

  • Na-ion battery
  • Prussian blue analogues
  • cathode battery materials
  • intercalation
  • vanadium hexacyanoferrate

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