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RESEARCH PRODUCT

Atomic Layer Deposition of Spinel Lithium Manganese Oxide by Film-Body-Controlled Lithium Incorporation for Thin-Film Lithium-Ion Batteries

Ville MiikkulainenAmund RuudHelmer FjellvågOla NilsenMikko LaitinenTimo SajavaaraErik ØStreng

subject

Battery (electricity)Materials scienceta114Lithium vanadium phosphate batterySpinelInorganic chemistrychemistry.chemical_elementengineering.materialElectrochemical energy conversionSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsAtomic layer depositionGeneral EnergychemistryImpurityengineeringLithiumCrystallitePhysical and Theoretical Chemistry

description

Lithium manganese oxide spinels are promising candidate materials for thin-film lithium-ion batteries owing to their high voltage, high specific capacity for storage of electrochemical energy, and minimal structural changes during battery operation. Atomic layer deposition (ALD) offers many benefits for preparing all-solid-state thin-film batteries, including excellent conformity and thickness control of the films. Yet, the number of available lithium-containing electrode materials obtained by ALD is limited. In this article, we demonstrate the ALD of lithium manganese oxide, LixMn2O4, from Mn(thd)3, Li(thd), and ozone. Films were polycrystalline in their as-deposited state and contained less than 0.5 at. % impurities. The chemical reactions between the lithium precursor and the film were found not to be purely surface-limited but to include a bulk component as well, contrary to what is usually found for ALD processes. In addition, we show a process for using Li(thd)/ozone and LiOtBu/water treatments to t...

yearjournalcountryeditionlanguage
2013-12-31The Journal of Physical Chemistry C
https://doi.org/10.1021/jp409399y