Effects of intercalation-induced stress on lithium transport through porous LiCoO2 electrode

Choi, Young Cheol; Pyun, Su‐Il

doi:10.1016/s0167-2738(97)00253-1

Cited by 121 publications

(84 citation statements)

References 19 publications

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“…[14][15][16][17] The decrease in diffusion coefficient with decreasing crystallite size has also been found for various other insertion compounds. [18][19][20] The origin of the slower Li-ion transport toAbstract: Sustainable energy storage in the form of Li-ion batteries requires new and advanced materials in particular with a higher power density. Nanostructuring appears to be a promising strategy, in which the higher power density in nanosized materials is related to the dramatically shortened Li-ion diffusion paths.…”

mentioning

confidence: 99%

The Influence of Size on Phase Morphology and Li‐Ion Mobility in Nanosized Lithiated Anatase TiO₂

Wagemaker

Borghols

Eck

et al. 2007

Chemistry A European J

101

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Sustainable energy storage in the form of Li-ion batteries requires new and advanced materials in particular with a higher power density. Nanostructuring appears to be a promising strategy, in which the higher power density in nanosized materials is related to the dramatically shortened Li-ion diffusion paths. However, nanosizing materials also changes intrinsic material properties, which influence both ionic and electronic conductivity. In this work neutron diffraction is used to show that in addition to these two aspects, nanostructuring changes the phase behavior and morphology. Lithiated 40-nm TiO(2) anatase crystallites become single phase, either having the Li-poor original anatase phase, or the Li-rich Li-titanate phase, in contrast to microsized crystallites where these two phases coexist in equilibrium within one crystal particle. In addition, Li(x)TiO(2) compositions occur with stoichiometries that are not stable in micron-sized crystallites, indicating enhanced solid solution behavior. Reduced conduction electron densities at the sites of the Li ions are observed by NMR spectroscopy. This is accompanied by reduced spontaneous Li-ion mobility, suggesting a correlation between the electron density at the Li-ion site and the Li-ion mobility. The present results show that in the case of lithiated anatase TiO(2), significant effects on phase composition, morphology, and electronic configurations are induced, as well as slower intracrystallite Li diffusion.

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mentioning

confidence: 99%

The Influence of Size on Phase Morphology and Li‐Ion Mobility in Nanosized Lithiated Anatase TiO₂

Wagemaker

Borghols

Eck

et al. 2007

Chemistry A European J

101

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“…Choi and Pyun found that increased intercalation-induced stress gradients within Multilayer 570-750 10 2 relative to bulk YSZ [191] particles of LiCoO 2−δ correlated with decreased lithium diffusivity [197]. The nanoscale mapping of regions of enhanced lithium diffusivity performed by Balke et al identified grains and grain boundaries of enhanced diffusivity with ESM [52].…”

Section: Strain Chemistry and Conductivitymentioning

confidence: 99%

Chemomechanics of ionically conductive ceramics for electrical energy conversion and storage

et al. 2014

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Functional materials for energy conversion and storage exhibit strong coupling between electrochemistry and mechanics. For example, ceramics developed as electrodes for both solid oxide fuel cells and batteries exhibit cyclic volumetric expansion upon reversible ion transport. Such chemomechanical coupling is typically far from thermodynamic equilibrium, and thus is challenging to quantify experimentally and computationally. In situ measurements and atomistic simulations are under rapid development to explore how this coupling can be used to potentially improve both device performance and durability. Here, we review the commonalities of coupling between electrochemical and mechanical states in fuel cell and battery materials, illustrating with specific cases the progress in materials processing, in situ characterization, and computational modeling and simulation. We also highlight outstanding questions and opportunities in these applications -both to better understand the limiting mechanisms within the materials and to significantly advance the durability and predictability of device performance required for renewable energy conversion and storage.

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“…On the other hand the amorphous or porous matrices are essentially heterogeneous and their properties are known only statistically. In this case it is difficult to "invent" a simple experimental test (like (20)), giving an exhaustive description. We assume that the insertion of guest species into a heterogeneous matrix results in a strain distribution for various matrix domains.…”

Section: B Heterogeneous Matrixmentioning

confidence: 99%

Role of structural fluctuations in the insertion into complex host matrices

Vakarin

Badiali

2005

Electrochimica Acta

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A coupling of structural and thermodynamic fluctuations in the course of various-type insertion processes is investigated within a combination of Gibbsian statistics and the information theory approach. It is shown that the coupling makes it possible to restore (at least partially) the information, inaccessible from experimental tests. This enables one to make physically reasonable predictions under limited information on the system.

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Effects of intercalation-induced stress on lithium transport through porous LiCoO2 electrode

Cited by 121 publications

References 19 publications

The Influence of Size on Phase Morphology and Li‐Ion Mobility in Nanosized Lithiated Anatase TiO₂

The Influence of Size on Phase Morphology and Li‐Ion Mobility in Nanosized Lithiated Anatase TiO₂

Chemomechanics of ionically conductive ceramics for electrical energy conversion and storage

Role of structural fluctuations in the insertion into complex host matrices

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Effects of intercalation-induced stress on lithium transport through porous LiCoO2 electrode

Cited by 121 publications

References 19 publications

The Influence of Size on Phase Morphology and Li‐Ion Mobility in Nanosized Lithiated Anatase TiO2

The Influence of Size on Phase Morphology and Li‐Ion Mobility in Nanosized Lithiated Anatase TiO2

Chemomechanics of ionically conductive ceramics for electrical energy conversion and storage

Role of structural fluctuations in the insertion into complex host matrices

Contact Info

Product

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The Influence of Size on Phase Morphology and Li‐Ion Mobility in Nanosized Lithiated Anatase TiO₂

The Influence of Size on Phase Morphology and Li‐Ion Mobility in Nanosized Lithiated Anatase TiO₂