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Characterization of Ni porous electrode covered by a thin film of LiMg0.05Co0.95O2

TitoloCharacterization of Ni porous electrode covered by a thin film of LiMg0.05Co0.95O2
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2006
AutoriSimonetti, E., and Presti R.L.
RivistaJournal of Power Sources
Volume160
Paginazione816-820
ISSN03787753
Parole chiaveCell performance, Composition, Dissolution, Doping (additives), Electrochemical electrodes, Gel precursors, Heat treatment, Lithium compounds, Molten carbonate, Molten materials, Nickel, Nickel cathode, Porous materials, Sol impregnation, Substrates, Thin films
Abstract

A porous electrode of nickel covered by a thin film of lithium cobaltite doped with magnesium (LiMg0.05Co0.95O2) was prepared in order to protect nickel cathode against dissolution into the molten carbonate. A sol impregnation technique was used to deposit gel precursors on the porous surface of the substrate; the covered substrate was submitted to thermal treatments, which produced a lithium cobaltite layer. The cathode was characterized by the following measurements: biaxial bending test, SEM/EDX analysis, which demonstrated the uniformity of the lithium cobaltite layer and the presence of cobalt homogeneously distributed over the nickel particles, electrical conductivity. To test the cathodic performance of the material under study a cell was assembled and tested in a 10 cm × 10 cm electrodes area plant. The cell performance during the time was studied carrying out polarization curves for many hours (more than 1000 h). To determine the influence of the cathodic gas composition on the electrode performance the atmosphere was changed maintaining alternatively at a constant value the partial pressure of CO2 and O2. In such a way the kinetic effect of the single gas was studied. By the technique of IR interruption the internal resistance of the cell was measured. © 2006 Elsevier B.V. All rights reserved.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-33749150135&doi=10.1016%2fj.jpowsour.2006.04.114&partnerID=40&md5=eb388c837b12536ff651b9dccfaea241
DOI10.1016/j.jpowsour.2006.04.114
Citation KeySimonetti2006816