Partial cation-order and early-stage, phase separation in phase W, Li
 
 x
 
 Co
 
 1−
 x
 
 O: 0.075≤
 x
 ≤0.24−0.31

Wu, Ying; Pasero, Denis; McCabe, Emma E.; Matsushima, Yuta; West, Anthony R.

doi:10.1098/rspa.2008.0489

Cited by 7 publications

(4 citation statements)

References 9 publications

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“…2a); hence, the molecular crystal structure of PANI-Zn is similar to that of a layered rock-salt structure. 49 We measured the electrical conductivity of the PANI-Zn films with thicknesses of ~100 nm using the 4-point probe method to understand the effect of the crystalline structure on the electron transferability. PANI-Zn films were not further chemically or electrically doped.…”

Section: Pani-ebmentioning

confidence: 99%

In situ formation of molecular-scale ordered polyaniline films by zinc coordination

et al. 2017

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Considerable research approaches have focused on improving the crystallinity of conducting polymers to enhance the electrical conductivity. However, it is difficult to control the arrangement of polymer chains without the use of expensive and complex methods because of the intrinsic morphology of polymers. Herein, we report a one-step in situ process to produce controlled molecular-scale ordered polyaniline (PANI) films by coordination crosslinking with Zn ions using solvent-vapor thermal annealing (SVTA). The resulting PANI film crosslinked by Zn coordination has a face-centered cubic structure at the molecular scale, which was confirmed by high-voltage electron microscopy. The in situ coordination crosslinking produced a new class of molecular ordering in the PANI films and drastically enhanced their conductivity, showing their potential for use in various electronic and energy devices.

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Section: Pani-ebmentioning

confidence: 99%

In situ formation of molecular-scale ordered polyaniline films by zinc coordination

et al. 2017

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“…The cross-scale analysis indicates that the effect of surface/interface stresses are significant for nanoelectrode particles, but can be neglected for the micro ones. 3. For nanoelectrode particles, before phase transformation happens, the electrode particle is under compression, which helps to reduce the danger of crack propagation.…”

Section: Resultsmentioning

confidence: 99%

“…Lithium ion batteries are the choices of diverse applications, such as electronics and electric cars because of their high capacity, high voltage and long lifetime, and therefore attracted wide research interests [1][2][3][4][5][6]. During the process of discharge/charge, lithium ions insert into/extract from electrodes, which will cause cyclic deformation.…”

Section: Introductionmentioning

confidence: 99%

Stress fields in hollow core–shell spherical electrodes of lithium ion batteries

Liu

et al. 2014

Proc. R. Soc. A.

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This paper presents a comprehensive model coupling the effects of hydrostatic stress, surface/interface stress, phase transformation and the structure of electrodes. First, the governing equation of moving phase interface with hydrostatic stress is established. Under the effect of hydrostatic stress, phase transformation process is much faster, which means phase transformation time is overestimated in previous publications. Then, a cross-scale analysis is presented to investigate the size effect owing to hydrostatic stress, surface stress and interface stress separately, which concludes that the effect of hydrostatic stress is significant for the stress field in microelectrode particles, whereas that of surface/interface stress is highlighted in nano-ones. Finally, an electrochemical variable 'efficiency' (ratio of effective capacity over total capacity) is defined. The advantages of hollow structure electrodes on stress and efficiency are analysed. The present model is helpful for the material and structure design of electrodes of lithium ion batteries.

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“…Lithium-ion batteries are the choices of diverse applications, such as electronics and electric cars because of their high capacity, high voltage, and long lifetime, and attract wide research interest in the community of chemistry, electro-chemistry, and mechanics [1][2][3][4][5][6]. During the process of charging/discharging, lithium ions insert into/extract from electrodes and induce high stresses [7].…”

Section: Introductionmentioning

confidence: 99%

Stress Analysis of Electrode Particles in Lithium-Ion Batteries

Liu¹,

Duan²

2016

Alkali-Ion Batteries

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This chapter reviews several theoretical models that are used to compute the stress fields inside the electrode particles of lithium-ion batteries during discharging/charging process and provides a guideline for researchers to choose the appropriate models. Due to the limitation of the existing models, a general electrochemo-mechanical framework is presented to model the concentration and stress fields of the electrode during the phase transformation. The interaction between stresses fields and phase transformation is addressed, which is a novel discovery in the research of lithium-ion batteries. The electrodes with different sizes and geometries are compared. The structural and electrochemical advantages of hollow core-shell structure particles are highlighted. The present work could help to accurate predict stress profile in electrode particles with different sizes, geometries, and charging operations and contributes to finding the optimal electrode. Therefore, this chapter is helpful for the material and structure design of electrodes of lithium-ion batteries.

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Partial cation-order and early-stage, phase separation in phase W, Li _x Co _{1−
x} O: 0.075≤ x ≤0.24−0.31

Cited by 7 publications

References 9 publications

In situ formation of molecular-scale ordered polyaniline films by zinc coordination

In situ formation of molecular-scale ordered polyaniline films by zinc coordination

Stress fields in hollow core–shell spherical electrodes of lithium ion batteries

Stress Analysis of Electrode Particles in Lithium-Ion Batteries

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Partial cation-order and early-stage, phase separation in phase W, Li x Co 1− x O: 0.075≤ x ≤0.24−0.31

Cited by 7 publications

References 9 publications

In situ formation of molecular-scale ordered polyaniline films by zinc coordination

In situ formation of molecular-scale ordered polyaniline films by zinc coordination

Stress fields in hollow core–shell spherical electrodes of lithium ion batteries

Stress Analysis of Electrode Particles in Lithium-Ion Batteries

Contact Info

Product

Resources

About

Partial cation-order and early-stage, phase separation in phase W, Li _x Co _{1−
x} O: 0.075≤ x ≤0.24−0.31