Atomic force microscopy studies of surface and dimensional changes in LixCoO2 crystals during lithium de-intercalation

Clemencon, Anne; Appapillai, Anjuli T.; Kumar, Sundeep; Shao‐Horn, Yang

doi:10.1016/j.electacta.2006.12.076

Cited by 49 publications

(41 citation statements)

References 41 publications

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“…24,25 These two specific x values are close to those found in Na x CoO 2 system near x ∼ 0.55 and 0.43 with distinctly different Laue superlattice patterns and magnetic phase transitions. 17 The origin of phases with slight deviation from exact x=1/2 remains to be explored, but preliminary electron diffraction studies for Na x CoO 2 with x near 0.5 has been attributed to the The inset reveals the anisotropic anomaly near ∼10K, which suggests the existence of A-type AF ordering with spins aligned antiferromagnetic along the c-direction.…”

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confidence: 53%

Electronic phase diagram of LixCoO2revisited with potentiostatically deintercalated single crystals

et al. 2012

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Electronic phase diagram of LixCoO2 has been re-examined using potentiostatically deintercalated single crystal samples. Stable phases of x ∼ 0.87, 0.72, 0.53, 0.50, 0.43, and 0.33 were found and isolated for physical property studies. A-type and chain-type antiferromagnetic orderings have been suggested from magnetic susceptibility measurement results in x ∼ 0.87 and 0.50 below ∼ 10K and 200K, respectively, similar to those found in NaxCoO2 system. There is no Li vacancy superlattice ordering observed at room temperature for the electronically stable phase Li0.72CoO2 as revealed by synchrotron X-ray Laue diffraction. The peculiar magnetic anomaly near ∼175K as often found in powder samples of x∼0.46-0.78 cannot be isolated through this single crystal potentiostatic method, which supports the previously proposed explanation to be surface stabilized phase of significant thermal hysteresis and aging character.

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confidence: 53%

Electronic phase diagram of LixCoO2revisited with potentiostatically deintercalated single crystals

et al. 2012

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“…The elegant work of Shao Horn group has demonstrated direct measurement of step height on LiCoO 2 surface as a function of Li concentration. 15 This approach, however, is slow and is applicable only to a limited number of materials.…”

Section: Introductionmentioning

confidence: 99%

Local probing of ionic diffusion by electrochemical strain microscopy: Spatial resolution and signal formation mechanisms

Morozovska

Eliseev

Balke

et al. 2010

Journal of Applied Physics

147

180

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“…Many investigations have been carried out to understand the charge and discharge mechanism and improve the electrochemical performance of LIBs. [3][4][5][6][7][8][9][10][11][12][13][14] The LIB electrode is a "composite electrode," composed of active materials, conductive agents, and binders. Therefore, although the electrochemical characteristics of these composite electrodes must be evaluated from the viewpoint of battery engineering, it is not easy to distinguish the intrinsic properties of the active materials from those of the other materials in the composite electrode.…”

Section: Introductionmentioning

confidence: 99%

Intrinsic Electrochemical Characteristics in the Individual Needle-like LiCoO<sub>2</sub> Crystals Synthesized by Flux Growth

et al. 2017

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The intrinsic electrochemical characteristics of needle-like LiCoO 2 crystals with a hexagonal cylindrical shape were studied by the single particle measurement technique. The needle-like LiCoO 2 crystals were synthesized by the flux growth method. Single-particle Raman spectroscopy and galvanostatic charge-discharge tests at different electrical contact points in one needle-like LiCoO 2 crystal revealed that the crystal has homogeneous intercalation/ deintercalation characteristics throughout the long axis. This suggests that the electron conductivity is high on a 100 µm scale along that axis and that lithium ions are efficiently transferred from the electrolyte to the layer structure of the crystal. The charge rate characteristics of the needle-like LiCoO 2 crystals were also evaluated and compared to those of powdered LiCoO 2 . The polarization curve analysis indicates that the needle-like LiCoO 2 particles had almost same exchange current density, i 0 , as powdered LiCoO 2 , which has a much smaller volume. These excellent electrochemical characteristics are considered to be due to the orientation of the {104} crystal face on the crystal sides, which is the preferential face for lithium ion transfer, and the larger effective surface area of the particles.

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Atomic force microscopy studies of surface and dimensional changes in LixCoO2 crystals during lithium de-intercalation

Cited by 49 publications

References 41 publications

Electronic phase diagram of LixCoO2revisited with potentiostatically deintercalated single crystals

Electronic phase diagram of LixCoO2revisited with potentiostatically deintercalated single crystals

Local probing of ionic diffusion by electrochemical strain microscopy: Spatial resolution and signal formation mechanisms

Intrinsic Electrochemical Characteristics in the Individual Needle-like LiCoO<sub>2</sub> Crystals Synthesized by Flux Growth

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