Preparation and characterization of LiCoO[sub 2] thin films by laser ablation deposition

Journal Article · Mon Mar 01 04:00:00 EST 1993 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2056123· OSTI ID:6478816

Antaya, M; Preston, J S ^[1]; Dahn, J R; Rossen, E; Reimers, J N ^[2]

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1. McMaster Univ., Hamilton, Ontario (Canada)
2. Simon Fraser Univ., Burnaby, British Columbia (Canada)

Lithium cobalt oxide, LiCoO[sub 2] is now used as a cathode material in advanced rechargeable lithium batteries. Thin films of LiCoO[sub 2] are obtained by Laser ablation from sintered LiCoO[sub 2] targets. The films were deposited on stainless steel or tantalum foil substrates so they could be used as cathodes in rechargeable thin-film lithium batteries. The films are amorphous when deposited on unheated substrates, but crystallize readily when heated in air above 500 C. Using x-ray diffraction, the authors show that the films are basically stoichiometric and have no impurity phases present. They consist partly of the normal bulk LiCoO[sub 2] phase which can be prepared by reacting Li[sub 2]CO[sub 3] and CoCO[sub 3] at 850 C. However, the films also contain some of the new, low temperature LiCoO[sub 2] phase recently reported by Gummow et al. In order to understand the films better the authors have synthesized bulk low temperature LiCoO[sub 2] from LiNO[sub 3] and Co(NO[sub 3])[sub 2] at 400 C to measure its structure and electrochemical properties. Although the crystal structures of the high and low temperature phases do differ, they are similar enough that quantitative estimates of the amount of each phase present in the films based on diffraction data alone is difficult. On the other hand, electrochemical measurements can distinguish between the high and low temperature phases.

• OSTI ID: 6478816
• Journal Information: Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 140:3; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250903* -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360602 -- Other Materials-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
AMORPHOUS STATE
CATHODES
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL PROPERTIES
CHEMISTRY
COBALT COMPOUNDS
COBALT OXIDES
COHERENT SCATTERING
CRYSTAL STRUCTURE
DEPOSITION
DIFFRACTION
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELECTRODES
LITHIUM COMPOUNDS
LITHIUM OXIDES
MATERIALS TESTING
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
SCATTERING
SYNTHESIS
TESTING
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION