skip to main content

SciTech ConnectSciTech Connect

Title: Chemical delithiation and exfoliation of Li{sub x}CoO{sub 2}

Progressive chemical .delithiation of commercially available lithium cobalt oxide (LiCoO{sub 2}) showed consecutive changes in the crystal properties. Rietveld refinement of high resolution X-ray and neutron diffraction revealed an increased lattice parameter c and a reduced lattice parameter a for chemically delithiated samples. Using electron microscopy we have also followed the changes in the texture of the samples towards what we have found is a critical layer stoichiometry of about Li{sub x}CoO{sub 2} with x=1/3 that causes the grains to exfoliate. The pattern of etches by delithiation suggests that unrelieved strain fields may produce chemical activity. - Graphical abstract: The effect of chemical dedoping of Li{sub x}CoO{sub 2} leads to a significant change in the (003) peak and to exfoliation for x=1/3. - Highlights: • Chemical delithiation of Li{sub x}CoO{sub 2} showed consecutive changes in crystal properties. • We performed X-ray as well as neutron diffraction on delithiated material. • Crystal analysis revealed an increased c and a reduced a for delithiated samples. • Electron microscopy revealed changes in the texture for Li{sub x}CoO{sub 2} (x=1/3)
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Center of Sustainable Energy Systems, The Australian National University, Canberra ACT 0200 (Australia)
  2. (Austria)
  3. Applied Mathematics, The Australian National University, Canberra ACT 0200 (Australia)
  4. Graz University of Technology, A-8010 Graz (Austria)
  5. Research School of Chemistry, The Australian National University, Canberra ACT 0200 (Australia)
Publication Date:
OSTI Identifier:
22451117
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 220; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CLATHRATES; COBALT OXIDES; CRYSTALS; ELECTRON MICROSCOPY; LATTICE PARAMETERS; LITHIUM; LITHIUM ION BATTERIES; NEUTRON DIFFRACTION; PEAKS; TEXTURE; THERMODYNAMIC ACTIVITY; X RADIATION; X-RAY DIFFRACTION