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Tailoring the morphology of LiCoO2: A first principles study

Kramer, Denis and Ceder, Gerbrand (2009) Tailoring the morphology of LiCoO2: A first principles study Chemistry of Materials, 21, (16), pp. 3799-3809. (doi:10.1021/cm9008943).

Record type: Article


Surface energies of several low-index surfaces of layered LiCoO2 are investigated as a function of the external lithium and oxygen chemical potentials by means of First Principles calculations in the generalized gradient approximation (GGA) to density functional theory (DFT), treating on-site electron correlation within the DFT+U framework. We find the set of surfaces contained in the equilibrium shape to be depending on environment. The(0001)and (10 (1) over bar4) surfaces are present for all reasonable values of the Li and O chemical potentials. The (01 (1) over bar2) surface, however, is stable only under oxidizing conditions. The equilibrium shape is sensitive to the equilibration environment because the thermodynamically favorable surface terminations and surface energies of the polar (0001) and (01 (1) over bar2) surfaces are a function of environment. This provides a lever to tailor the crystal shape according to application requirements (e.g., as active material in lithium-ion batteries).

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Published date: 2009
Organisations: Engineering Mats & Surface Engineerg Gp


Local EPrints ID: 189745
ISSN: 0897-4756
PURE UUID: a23bd6ed-11fa-4923-9b78-6cc0d95b4037

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Date deposited: 06 Jun 2011 13:57
Last modified: 18 Jul 2017 11:39

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Author: Denis Kramer
Author: Gerbrand Ceder

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