Regensburg 2016 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 26: Poster session II
MM 26.32: Poster
Dienstag, 8. März 2016, 18:30–20:30, Poster B3
Deposition of transition metal oxide thin film cathode materials for Li-ion battery application — •Geoffrey Matthew Tan1, Christoph Loho1, Oliver Clemens1,2, and Horst Hahn1,2,3 — 1Joint Research Laboratory Nanomaterials, Darmstadt, Germany — 2Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany — 3Helmholtz Institute Ulm, Ulm, Germany
The development of smaller and more powerful electronic devices places a strong demand on energy sources that are compact, safe and have a high energy density. Solid state thin film lithium ion batteries are one of the candidates to fulfill this demand. The use of aerosol assisted chemical vapor deposition (AA-CVD) to precisely control stoichiometry in nickel substituted LiCoO2, which acts as cathode in such a device, is a possible strategy to increase the energy density.
The aim of this study was to find the optimum process parameters for LiCoO2 thin film deposition using AA-CVD and to substitute cobalt by nickel to form lithium nickel cobalt oxide, because of its higher energy density and lower cost.
The structure, morphology and phase composition of LiCoO2 films as well as nickel substituted films were studied comprehensively. Phase pure LiCoO2 was deposited at 850 °C. Electrochemical characterization in a Swagelok type half-cell demonstrated a specific capacity of 94 mAh/g for LiCoO2. Despite the precise control of the nickel to cobalt ratio, the deposited thin films do not show the desired phase. Their electrochemical activity will be discussed.