3D indium tin oxide electrodes by ultrasonic spray deposition for current collection applications

Three dimensionally (3D) structured indium tin oxide (ITO) thin films are synthesized and characterized as a 3D electrode material for current collection applications. Using metal citrate chemistry in combination with ultrasonic spray deposition, a low cost wet-chemical method has been developed to...

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Veröffentlicht in:Journal of power sources Jg. 348; S. 130 - 137
Hauptverfasser: van den Ham, E.J., Elen, K., Bonneux, G., Maino, G., Notten, P.H.L., Van Bael, M.K., Hardy, A.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Elsevier B.V 30.04.2017
Schlagworte:
3D structures
Current collector
ITO
TCO
Transparent conductive oxide
TCO
Films
Current collector
Transparent conductive oxide
ITO
3D structures
ISSN:0378-7753, 1873-2755
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Zusammenfassung:Three dimensionally (3D) structured indium tin oxide (ITO) thin films are synthesized and characterized as a 3D electrode material for current collection applications. Using metal citrate chemistry in combination with ultrasonic spray deposition, a low cost wet-chemical method has been developed to achieve conformal ITO coatings on non-planar scaffolds. Although there is room for improvement with respect to the resistivity (9.9·10−3 Ω∙cm, 220 nm thick planar films), high quality 3D structured coatings were shown to exhibit conductive properties based on ferrocene reactivity. In view of applications in Li-ion batteries, the electrochemical stability of the current collector was investigated, indicating that stability is guaranteed for voltages of 1.5 V and up (vs. Li+/Li). In addition, subsequent 3D coating of the ITO with WO3 as a negative electrode (battery) material confirmed the 3D ITO layer functions as a proper current collector. Using this approach, an over 4-fold capacity increase was booked for 3D structured WO3 in comparison to planar samples, confirming the current collecting capabilities of the 3D ITO coating. Therefore, the 3D ITO presented is considered as a highly interesting material for 3D battery applications and beyond. [Display omitted] •3D ITO electrodes prepared with a low cost, highly-up scalable method.•Various 3D structures were coated, showing versatility of the approach.•The conductivity was studied with vdPauw and electrochemical methods.•Deposition of WO3 on top of 3D ITO shows a large capacity enhancement.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2017.03.006