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

Journal Article · Mon Dec 15 00:00:00 EST 2014 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/J.JSSC.2014.08.011· OSTI ID:22451117

Basch, Angelika ^[1]; Campo, Liliana de ^[2]; Albering, Jörg H. ^[3]; White, John W. ^[4]

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1. Center of Sustainable Energy Systems, The Australian National University, Canberra ACT 0200 (Australia)
2. Applied Mathematics, The Australian National University, Canberra ACT 0200 (Australia)
3. Graz University of Technology, A-8010 Graz (Austria)
4. Research School of Chemistry, The Australian National University, Canberra ACT 0200 (Australia)

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)

• OSTI ID: 22451117
• Journal Information: Journal of Solid State Chemistry, Vol. 220; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

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