Lithium vanadium oxide (Li1.1V3O8) thick porous electrodes with high rate capacity: utilization and evolution upon extended cycling elucidated via operando energy dispersive X-ray diffraction and continuum simulation

2021 ◽  
Vol 23 (1) ◽  
pp. 139-150
Author(s):  
Alison H. McCarthy ◽  
Karthik Mayilvahanan ◽  
Mikaela R. Dunkin ◽  
Steven T. King ◽  
Calvin D. Quilty ◽  
...  
Keyword(s):  
Continuum Model ◽  
Capacity Utilization ◽  
Porous Electrodes ◽  
High Rate ◽  
Electrode Design ◽  
X Ray Diffraction ◽  
X Ray ◽  
Lithium Vanadium Oxide ◽  
Rate Capacity ◽  
Thick Electrode

Thick electrode design and charge transport across electrode were probed via operando EDXRD and an expanded continuum model.

Full Utilization of Lithium Trivandate (Li1.1V3O8) in Thick Porous Electrodes with High Rate Capacity upon Extended Cycling Elucidated Via Operando Energy Dispersive X-Ray Diffraction

2021 ◽  
Vol MA2021-01 (8) ◽  
pp. 2096-2096
Author(s):  
Alison H. McCarthy ◽  
Karthik Mayilvahanan ◽  
Mikaela R. Dunkin ◽  
Steven T. King ◽  
Calvin Quilty ◽  
...  
Keyword(s):  
Porous Electrodes ◽  
Energy Dispersive ◽  
High Rate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Rate Capacity ◽  
Full Utilization

Irreversible phase transition between LiFePO4 and FePO4 during high-rate charge-discharge reaction by operando X-ray diffraction

2016 ◽  
Vol 309 ◽  
pp. 122-126 ◽  
Author(s):  
Ikuma Takahashi ◽  
Takuya Mori ◽  
Takahiro Yoshinari ◽  
Yuki Orikasa ◽  
Yukinori Koyama ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Rate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Charge Discharge ◽  
Discharge Reaction

scholarly journals X-Ray Diffraction Study of Amorphous CeFe2H3 and GdFe2H3 Alloys Produced by Hydrogenation

1987 ◽  
Vol 42 (6) ◽  
pp. 582-586 ◽  
Author(s):  
E. Matsubara ◽  
Y. Ohzora ◽  
Y. Waseda ◽  
K. Aoki ◽  
K. Fukamichi ◽  
...  
Keyword(s):  
Diffraction Study ◽  
Structural Features ◽  
High Rate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dc Sputtering

The structure of amorphous CeFe2H3 and GdFe2H3 alloys produced by hydrogenation is investigated and compared with that of amorphous CeFe2 and GdFe2 produced by high-rate DC sputtering. Distinct different structural features, characterized by an almost resolved first peak of the RDF of the former were found.

Optical Characterization of High Quality GaN Produced by High Rate Magnetron Sputter Epitaxy

2002 ◽  
Vol 743 ◽  
Author(s):  
Minseo Park ◽  
E. Carlson ◽  
Y. C Chang ◽  
J. F. Muth ◽  
J. Bumgarner ◽  
...  
Keyword(s):  
Raman Spectra ◽  
Thick Films ◽  
High Rate ◽  
Near Band Edge ◽  
Bulk Single Crystal ◽  
X Ray Diffraction ◽  
X Ray ◽  
Magnetron Sputter ◽  
Polarized Raman

ABSTRACTThe thick films of GaN were investigated using X-ray diffraction, micro-Raman spectroscopy and photoluminescence spectroscopy. The thick films of GaN were prepared on (0001) sapphire using high rate magnetron sputter epitaxy with growth rates as high as 10–60 m/min. The width of the X-ray rocking curve ((0002) reflection) for the sample produced by this method is ∼300 arc-sec. Only the allowed modes were observed in the polarized Raman spectra. The background electron concentration is lower than 3×1016 cm−3, which was determined from the Raman spectra. The phonon lifetime determined from Raman E2(2) mode was 1.6 ps, which is comparable to that of bulk single crystal GaN grown by sublimation (1.4 ps). The full-width-at-half-maximum of the near band-edge photoluminescence peak obtained at 77K is ∼100 meV.

Microstructures and Electrochemical Properties of La0.7Ce0.3Ni3.7Co0.7-xAl0.2Mn0.4(Fe0.43B0.57)x (x = 0-0.4) Hydrogen Storage Alloys

2012 ◽  
Vol 608-609 ◽  
pp. 917-920
Author(s):  
Yu Zhou ◽  
Yan Ping Fan ◽  
Xian Yun Peng ◽  
Bao Zhong Liu
Keyword(s):  
Hydrogen Storage ◽  
Electrochemical Properties ◽  
Discharge Capacity ◽  
Secondary Phase ◽  
Cycling Stability ◽  
High Rate ◽  
X Ray Diffraction ◽  
Hydrogen Storage Alloys ◽  
X Ray ◽  
The Matrix

X-ray diffraction results indicate that pristine alloy has a single LaNi5 phase and the alloys containing Fe0.43B0.57 consist of the matrix LaNi5 phase and the La3Ni13B2 secondary phase. The abundance of La3Ni13B2 phase increases with increasing x value. Maximum discharge capacity of the alloy electrodes monotonically decreases from 336.1 mAh/g (x = 0) to 281.2 mAh/g (x = 0.4). High-rate dischargeability of the alloy electrodes first increases with increasing x from 0 to 0.20, and then decreases when x increases to 0.4. Cycling stability decreases with increasing x from 0 to 0.4.

Asymmetry between charge and discharge during high rate cycling in LiFePO4 – In Situ X-ray diffraction study

2008 ◽  
Vol 10 (4) ◽  
pp. 536-540 ◽  
Author(s):  
Ho Chul Shin ◽  
Kyung Yoon Chung ◽  
Won Sik Min ◽  
Dong Jin Byun ◽  
Ho Jang ◽  
...  
Keyword(s):  
Diffraction Study ◽  
High Rate ◽  
X Ray Diffraction ◽  
X Ray

A Comparative Study of Potentiostatic and Potentiodynamic Method in the Synthesis of MnO2 Films for Electrochemical Capacitors

2011 ◽  
Vol 239-242 ◽  
pp. 501-505 ◽  
Author(s):  
Ling Bin Kong ◽  
Rui Juan Bai ◽  
Yong Chun Luo ◽  
Long Kang
Keyword(s):  
Specific Capacitance ◽  
Nickel Foam ◽  
Three Dimensional ◽  
High Rate ◽  
X Ray Diffraction ◽  
Ac Impedance Spectroscopy ◽  
X Ray ◽  
Rate Discharge ◽  
High Rate Discharge ◽  
Potentiodynamic Method

Nanostructured ε-manganese dioxide films are deposited directly on three-dimensional nickel foam (NF) from 0.25 M Mn(CH3COO)2 by means of the potentiostatic method (PSM) and potentiodynamic method (PDM). The prepared MnO2 films are characterized by X-ray diffraction and scanning electron microscopy. The electrochemical properties of MnO2 films are investigated by cyclic voltammetry (CV), charge-discharge tests, and alternating current (AC) impedance spectroscopy. The results show that the PSM-MnO2 films exhibit higher specific capacitance and better high-rate discharge ability, which are more promising for applications in supercapacitor than PDM-MnO2 films. The specific capacitance of PSM-MnO2 films is about 664 F g-1 at 5.5 A g-1, which is higher than many reported values.

Amorphous and Metastable Phase Formation in Systems with Positive Heats of Mixing using High-Rate Sputter Deposition

1988 ◽  
Vol 128 ◽  
Author(s):  
H. F. Rizzo ◽  
A. Echeverria ◽  
T. B. Massalski ◽  
H. Baxi
Keyword(s):  
Metastable Phase ◽  
Sputter Deposition ◽  
High Rate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Amorphous Phases ◽  
Heats Of Mixing ◽  
Metastable Phase Formation ◽  
Atomic Radii ◽  
Deposition Techniques

ABSTRACTThe triode sputtering technique and a “split-target” arrangement were used to produce metastable crystalline and amorphous phases in the Cu-W, Mo-Cu, Ag-Fe, Ag-Cu, Pu-Ta and Pu-V systems. These systems all exhibit liquid and solid immiscibility and have positive heats of mixing and atomic radii that differ by at least 10%. The sputtered coatings, whose thickness varied between 25 and 200 microns, were formed at deposition rates between 35 and 200 Å/s. They were characterized using x-ray diffraction, TEM, microprobe, microhardness, and DSC techniques. The observed amorphous and metastable solid solution phases are discussed in terms of predicated heats of formation for these phases using Miedema's thermodynamic approximations [1] that include chemical, elastic, and structural contributions. Differences in compositional ranges observed by high rate sputter deposition compared to other vapor deposition techniques (e.g., coevaporation) appeared to arise as a result of processes that occur during deposition or immediately following deposition.

A high-rate gaseous area detector for x-ray diffraction applications

2004 ◽  
Author(s):  
David M. Khazins ◽  
Bruce L. Becker ◽  
Bob B. He ◽  
Yacouba Diawara ◽  
Roger D. Durst ◽  
...  
Keyword(s):  
High Rate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Area Detector

scholarly journals Coal bottom ash characterization aiming the incorporation in cellular concrete

2021 ◽  
Vol 26 (3) ◽  
Author(s):  
Fernanda Pacheco ◽  
Michael Anderson Bica Moreira ◽  
Marlova Piva Kuwakowiski ◽  
Feliciane Andrade Breh ◽  
Bernardo Fonseca Tutikian
Keyword(s):  
Silica Fume ◽  
Bottom Ash ◽  
Spherical Shape ◽  
High Rate ◽  
Strength Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Coal Bottom Ash ◽  
The Impact ◽  
Cellular Concrete

ABSTRACT Ahead of the incorporation of residues in concrete composition, there is a decline in the environmental impact of buildings. One of the goals of today’s development is the employment of low-impact energy sources, such as thermoelectric. Thermoelectric industries display a high rate of residues, among which is pointed out coal bottom ash (CBA) (15% total residues), which have density superior to fly ash and accumulates in silos. Considering this scenario, this paper assessed the incorporation feasibility of CBA in the composition of cellular concrete, replacing silica fume. This study comprehended CBA characterization and application. For such, it was performed a scanning electron microscope (SEM) associated with Energy dispersive spectroscopy (EDS) analysis, laser granulometry, X-ray diffraction (XRD), X-ray efflorescence and density. Following the incorporation of the residues in cellular concrete in place of silica fume, it was performed compression strength analysis and SEM anew, evaluating the impact of CBA’s insertion in concrete’s microstructure. The XRD results are complementary to the other analyses. With SEM technique, it was observed the predominance of spherical-shape particles. The compressive strength of CBA concretes was superior to the reference concrete from 0,13 to 0,74MPa.

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