2008
DOI: 10.1021/jp803719e
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Voltage−Composition Profile and Synchrotron X-ray Structural Analysis of Low and High Temperature LixCoO2 Host Material

Abstract: In the present work, the intercalation of lithium ions in the Li x CoO 2 host material was investigated by means of the discharge curves and voltage-composition profile with the main goal of establishing a close correlation between the voltage-composition patterns and the structure of the Li x CoO 2 prepared at low and high temperatures. As a result, the structures of the Li x CoO 2 prepared at low and high temperatures were investigated by a careful analysis of synchrotron X-ray powder diffraction (including … Show more

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Cited by 10 publications
(9 citation statements)
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“…18 For this reason, the sol-gel method has been widely used modulating these properties. 6,[18][19][20][21][22][23][24][25][26][27][28] The sol-gel method allows a larger surface area for the obtained solids, in our study the LiCoO 2 powder. In addition, this technique also enables a smaller Li-ion diffusion length due to the reduced LiCoO 2 Freitas et al 2255 Vol.…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…18 For this reason, the sol-gel method has been widely used modulating these properties. 6,[18][19][20][21][22][23][24][25][26][27][28] The sol-gel method allows a larger surface area for the obtained solids, in our study the LiCoO 2 powder. In addition, this technique also enables a smaller Li-ion diffusion length due to the reduced LiCoO 2 Freitas et al 2255 Vol.…”
Section: Introductionmentioning
confidence: 99%
“…1,2,7,8,[18][19][20][21][22][23][24] The rhombohedral phase is characterized by a structure with alternating layers of cobalt and lithium cations intercalated with oxygen anions. 22 The lithium and cobalt(III) ions are arranged in intercalated layers ( Figure 1a). The cobalt(III) ion is located at the octahedral sites, forming a strong bond with the neighboring oxygen anion to constitute the Co−O layers (Figure 1b).…”
Section: Introductionmentioning
confidence: 99%
“…21 Consequently, an increase in the c/a ratio is typically associated with a layered structure with decreased number of such defects, with a ratio close to 5.00 implying very low occurrence. 27 In all crystals, the introduction of Al-rich shells had no discernible effect on the bulk structure of the oxides.…”
Section: Resultsmentioning
confidence: 89%
“…The 27 Al MAS NMR of CS-NMC 700 and 800 (Figure 5b) had a diamagnetic 27 Al NMR peak at ∼55 ppm, due to the presence of octahedral Al environments surrounded by diamagnetic ions. Since distinct amorphous or crystalline Al 2 O 3 layers were not observed on the surface by STEM, the environments could be Al in Co-rich domains, sharing structural similarities with the core.…”
Section: Resultsmentioning
confidence: 99%
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