Journal Article

FZJ-2021-01218

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Electrochemical Proton Intercalation in Vanadium Pentoxide Thin Films and its Electrochromic Behavior in the near‐IR Region

Buchheit, A. (Corresponding author)FZJ* ; Teßmer, B. ; Muñoz-Castro, M. ; Bracht, H. ; Wiemhöfer, H.-D. (Corresponding author)FZJ*

2021
Wiley-VCH-Verl. Weinheim

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Please use a persistent id in citations: http://hdl.handle.net/2128/27552  doi:10.1002/open.202000267

Abstract: This work examines the proton intercalation in vanadium pentoxide (V2O5) thin films and its optical properties in the near‐infrared (near‐IR) region. Samples were prepared via direct current magnetron sputter deposition and cyclic voltammetry was used to characterize the insertion and extraction behavior of protons in V2O5 in a trifluoroacetic acid containing electrolyte. With the same setup chronopotentiometry was done to intercalate a well‐defined number of protons in the HxV2O5 system in the range of x=0 and x=1. These films were characterized with optical reflectometry in the near‐IR region (between 700 and 1700 nm wavelength) and the refractive index n and extinction coefficient k were determined using Cauchy’s dispersion model. The results show a clear correlation between proton concentration and n and k.

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Contributing Institute(s):

1. Helmholtz-Institut Münster Ionenleiter für Energiespeicher (IEK-12)

Research Program(s):

1. 122 - Elektrochemische Energiespeicherung (POF4-122) (POF4-122)

Appears in the scientific report 2021

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