J. Appl. Cryst.の発刊に際して

https://las493energy.files.wordpress.com/2014/11/2005_vetter_jpowsourc.pdf

Ageing mechanisms in lithium-ion batteries

Extraordinary electron systems can be generated at well-defined interfaces between complex oxides. In recent years, progress has been achieved in exploring and making use of the fundamental properties of such interfaces, and it has become clear that these electron systems offer the potential for possible future devices. We trace the state of the art of this emerging field of electronics and discuss some of the challenges and pitfalls that may lie ahead.

http://science.sciencemag.org/content/sci/327/5973/1607.full.pdf

Oxide Interfaces—An Opportunity for Electronics

Laser ablation in liquids : Applications in the synthesis of nanocrystals

Time-Frequency Analysis.

We report the first successful preparation of thin films of Y‐Ba‐Cu‐O superconductors using pulsed excimer laser evaporation of a single bulk material target in vacuum. Rutherford backscattering spectrometry showed the composition of these films to be close to that of the bulk material. Growth rates were typically 0.1 nm per laser shot. After an annealing treatment in oxygen the films exhibited superconductivity with an onset at 95 K and zero resistance at 85 and 75 K on SrTiO3 and Al2O3 substrates, respectively. This new deposition method is relatively simple, very versatile, and does not require the use of ultrahigh vacuum techniques.

Preparation of Y‐Ba‐Cu oxide superconductor thin films using pulsed laser evaporation from high Tc bulk material

Phase transition and lattice expansion during hydrogen loading of nanometer sized palladium clusters

The authors describe synchrotron based X-ray diffraction techniques and issues related to in situ studies of intercalation processes in battery electrodes. They then demonstrate the utility of this technique, through a study of two batches of Li{sub x}Mn{sub 2}O{sub 4} cathode materials. The structural evolution of these spinel materials was monitored in situ during the initial charge of these electrodes in actual battery cells. Significant differences were observed in the two batches, particularly in the intercalation range of x = 0.45 to 0.20. The first-order structural transitions in this region indicated coexistence of two cubic phases in the batch 2 material, whereas the batch 1 material showed suppressed two-phase coexistence. Batch 2 cells also indicated structural evolution in the low-potential region below 3.0 V in contrast to the batch 1 material. Differences in structural evolution between batches of Li{sub x}Mn{sub 2}O{sub 4} could have important ramifications in their cycle life and stability characteristics.

Structural evolution of Li{sub x}Mn{sub 2}O{sub 4} in lithium-ion battery cells measured in situ using synchrotron X-ray diffraction techniques

Isotherms of Pd–H clusters with different sizes differ from bulk isotherms: they show a largely enhanced solubility in the low-concentration regime. The isotherms resemble those of bulk above the critical point, they show no flat plateau region, but a slope. However, the existence of a hysteresis gives evidence for a phase transition even in small Pd–H clusters. Structural studies of 6.0 nm clusters show a transition between two cubic phases. 3.8 nm Pd–H clusters always show an icosahedral structure in the low and high concentration regime. For an intermediate size of 5.0 nm Pd–H clusters, the lattice structure changes during H-absorption, from cubic to, most probably, icosahedral. The slope in the cluster isotherm’s two-phase region is here attributed to stress emerging between the surfactant shell and the cluster during hydrogen-loading.

https://staff-old.najah.edu/sites/default/files/Hydrogen%20and%20Pd-clusters.pdf

Hydrogen and Pd-clusters

https://www.physics.rutgers.edu/~croft/papers/147-IJFatigue-1408-2005.pdf

Najeh Jisrawi

Papers

Preparation of Y‐Ba‐Cu oxide superconductor thin films using pulsed laser evaporation from high Tc bulk material

Phase transition and lattice expansion during hydrogen loading of nanometer sized palladium clusters

Structural evolution of Li{sub x}Mn{sub 2}O{sub 4} in lithium-ion battery cells measured in situ using synchrotron X-ray diffraction techniques

Hydrogen and Pd-clusters

Strain profiling of fatigue crack overload effects using energy dispersive X-ray diffraction