Preface

Chadwick, Henry; Chadwick, Nora K.

doi:10.1017/cbo9780511711015.001

Cited by 4 publications

(4 citation statements)

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“…The large volume fraction of interfacial regions and defects introduced is anticipated to govern macroscopic properties, particularly both short-range as well as long-range ion transport of the mobile cations [8][9][10][11][12]. In the present case, we focussed on the monoclinic modification, that is, the β-form of Li 2 TiO 3 (see Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Li Ion Dynamics in Nanocrystalline and Structurally Disordered Li₂TiO₃

Brandstätter¹,

Wohlmuth²,

Bottke³

et al. 2015

Zeitschrift Für Physikalische Chemie

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The monoclinic polymorph of Li 2 TiO 3 (β-form) is known to be a relatively poor Li ion conductor. Up to now, no information is available on how the ion transport properties change when going from well-ordered crystalline Li 2 TiO 3 to a structurally disordered form with the same chemical composition. Here, we used high-energy ball milling to prepare nanocrystalline, defect-rich Li 2 TiO 3 ; ion dynamics have been studied via impedance spectroscopy. It turned out that ball milling offers the possibility to enhance long-range ion transport in the oxide by approximately 3 orders of magnitude. Its effect on the oxide ceramic is two-fold: besides the introduction of a large number of defects, the originally μm-sized crystallites are decreased to crystallites with a mean diameter of less than 50 nm. This process is accompanied by a mechanically induced phase transformation towards the α-form of Li 2 TiO 3 ; besides that, a significant amount of amorphous materials is produced during milling. Structural disorder in nanocrystalline as well as amorphous Li 2 TiO 3 is anticipated to play the capital role in governing Li ion dynamics of the sample finally obtained.

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Section: Introductionmentioning

confidence: 99%

Li Ion Dynamics in Nanocrystalline and Structurally Disordered Li₂TiO₃

Brandstätter¹,

Wohlmuth²,

Bottke³

et al. 2015

Zeitschrift Für Physikalische Chemie

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“…It was necessary to have been in one of these horrifying situations to suffer symptoms but we could detect no difference between them as instigators of subsequent psychological distress. This distinction is important as the claim had been made by the defendant that only those inside the pens had the legal status of 'rescuers' rather than 'bystanders', and therefore only they could benefit from the established principle at law that a rescuer who suffers psychiatric injury as a consequence of their participation shall be compensated [20]. In practice, both those inside the pens and those outside were on duty and carrying out orders to the best of their ability; and both experienced the same degree of psychological injury.…”

Section: Discussionmentioning

confidence: 99%

The Phenomenology of Post-Traumatic Stress Disorder

Sims

Sims²

1998

Psychopathology

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This study analyses and categorises the subjective experiences and psychological symptoms of those involved in a major disaster but not themselves physically injured. It examines the concept of post-traumatic stress disorder (PTSD) and relates it to other psychiatric diagnoses and also to the particular nature of the disaster. 70 police officers are the subjects of this study, 59 men and 11 women, all of them involved in the Hillsborough Football Stadium Disaster. Assessment included detailed psychiatric history and examination with an account of the events experienced by the informants and their psychological reaction to this at the time and subsequently. Psychiatric diagnosis was made and quantified measurements were also recorded, including a rating scale for the criteria of PTSD, the General Health Questionnaire and rating scales for depression and anxiety. Severity of PTSD symptoms was associated with higher scores on rating scales for both depressive and anxiety symptomatology. Subjective depressive symptoms and depersonalisation were associated with severity of PTSD. Frustrated helplessness was a recurring theme in the psychopathology. Alcohol consumption of those who were already drinkers increased. Social functioning at work and in marriage deteriorated with increased severity of PTSD. Although PTSD has features that distinguish it from other conditions, the degree of distress and long-term disability is more related to depressive symptomatology than to the severity of PTSD itself.

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“…The precise measurement of diffusion parameters in solids is a vital topic in materials science [1][2][3][4]. In particular, the investigation of Li dynamics over a wide length scale turns out to be highly important to understand the underlying structure-property relationships governing ion transport in materials being relevant for battery applications [5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Studying Li Dynamics in a Gas-Phase Synthesized Amorphous Oxide by NMR and Impedance Spectroscopy

Epp¹,

Brünig

Binnewies

et al. 2012

Zeitschrift Für Physikalische Chemie

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Li Diffusion / Solid State NMR / Impedance Spectroscopy / Non-Stoichiometric CompoundsLi diffusion parameters of a structurally disordered Li-Al-Si-oxide prepared by gas-phase synthesis were complementarily investigated by both time-domain NMR techniques and impedance spectroscopy. The first include 7 Li NMR spin-lattice relaxation (SLR) measurements in the laboratory as well as in the rotating frame of reference. An analysis of variable-temperature NMR line widths point to an activation energy E a of approximately 0.6 eV. The value is confirmed by rotating-frame SLR NMR data recorded at approximately 11 kHz. Above room temperature the low-temperature flank of a diffusion-induced rate peak shows up which can be approximated by an Arrhenius law yielding E a = 0.56(1) eV. This is in very good agreement with the result obtained from 7 Li spin-alignment echo (SAE) NMR being sensitive to even slower Li dynamics. For comparison, dc-conductivity measurements, probing long-range motions, yield E a = 0.8 eV. Interestingly, lowtemperature SAE NMR decay rates point to localized Li motions being characterized with a very small activation energy of only 0.09 eV.

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Preface

Cited by 4 publications

References 0 publications

Li Ion Dynamics in Nanocrystalline and Structurally Disordered Li₂TiO₃

Li Ion Dynamics in Nanocrystalline and Structurally Disordered Li₂TiO₃

The Phenomenology of Post-Traumatic Stress Disorder

Studying Li Dynamics in a Gas-Phase Synthesized Amorphous Oxide by NMR and Impedance Spectroscopy

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Preface

Cited by 4 publications

References 0 publications

Li Ion Dynamics in Nanocrystalline and Structurally Disordered Li2TiO3

Li Ion Dynamics in Nanocrystalline and Structurally Disordered Li2TiO3

The Phenomenology of Post-Traumatic Stress Disorder

Studying Li Dynamics in a Gas-Phase Synthesized Amorphous Oxide by NMR and Impedance Spectroscopy

Contact Info

Product

Resources

About

Li Ion Dynamics in Nanocrystalline and Structurally Disordered Li₂TiO₃

Li Ion Dynamics in Nanocrystalline and Structurally Disordered Li₂TiO₃