Chemical Extraction of Lithium from Layered LiCoO2

Gupta, Rahul; Manthiram, Arumugam

doi:10.1006/jssc.1996.0067

Cited by 107 publications

(62 citation statements)

References 2 publications

(5 reference statements)

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“…This basal increment is a result of the increase in electrostatic repulsion between CoO 2 layers. [27] Such a slight lattice expansion upon acid treatment clearly demonstrates no intercalation of water molecules into the layered cobalt oxide lattice. This contrasts with the case of Na 0.7 CoO 2 , in which acid treatment leads to the formation of the BLH phase with expanded basal spacing (c = 10.08 ).…”

Section: Resultsmentioning

confidence: 98%

Soft‐Chemical Exfoliation Route to Layered Cobalt Oxide Monolayers and Its Application for Film Deposition and Nanoparticle Synthesis

Kim

Jee

et al. 2009

Chemistry A European J

100

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A colloidal suspension of exfoliated, layered cobalt oxide nanosheets has been synthesized through the intercalation of quaternary tetramethylammonium ions into protonated lithium cobalt oxide. According to atomic force microscopy, exfoliated nanosheets of layered cobalt oxide show a plateau-like height profile with nanometer-level height, underscoring the formation of unilamellar 2D nanosheets. The exfoliation of layered cobalt oxide was cross-confirmed by X-ray diffraction, UV/Vis spectroscopy, and transmission electron microscopy. The maintenance of the hexagonal in-plane structure of the cobalt oxide lattice after the exfoliation process was evidenced by selected-area electron diffraction and Co K-edge X-ray absorption near-edge structure analysis. The zeta-potential measurements clearly demonstrated the negative surface charge of cobalt oxide nanosheets. Adopting the nanosheets of layered cobalt oxide as a precursor, we were able to prepare the monodisperse CoO nanocrystals with a particle size of approximately 10 nm as well as the heterolayered film composed of cobalt oxide monolayer and polycation.

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Section: Resultsmentioning

confidence: 98%

Soft‐Chemical Exfoliation Route to Layered Cobalt Oxide Monolayers and Its Application for Film Deposition and Nanoparticle Synthesis

Kim

Jee

et al. 2009

Chemistry A European J

100

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“…The chemical extraction of lithium in aqueous medium was carried out at room temperature by stirring the oxide powders in 2.5 N H 2 SO 4 for 2 days, followed by filtering, washing with de-ionized water, and drying at 100 1C overnight in an air-oven. Extraction of lithium with aqueous acid is known to occur by a disproportionation of, for example, Mn 3+ into Mn 4+ (in solid) and Mn 2+ (into solution) in the spinel LiMn 2 O 4 [25] and Co 3+ into Co 4+ (in solid) and Co 2+ (into solution) in the layered LiCoO 2 [26].…”

Section: Methodsmentioning

confidence: 99%

Investigation of the possible incorporation of protons into oxide cathodes during chemical delithiation

Venkatraman

Manthiram

2004

Journal of Solid State Chemistry

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“…The lithium atoms are located at the octahedral sites between the CoO 2 layers. After delithiation, lithium-deficient compounds Li x CoO 2 can be obtained [14][15][16]; this phase belongs to the same space group. It has also been found that the end member of these compounds, CoO 2, can be obtained by electrochemical de-intercalation [17][18][19].…”

Section: Introductionmentioning

confidence: 99%