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

E.J. van den Ham, K. Elen, G. Bonneux, G. Maino, P.H.L. Notten, M.K. van Bael, A. Hardy

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

2 Citaten (Scopus)

Samenvatting

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 WO 3 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 WO 3 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.

Originele taal-2Engels
Pagina's (van-tot)130-137
Aantal pagina's8
TijdschriftJournal of Power Sources
Volume348
DOI's
StatusGepubliceerd - 30 apr 2017

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