Results 41 to 50 of about 13,692 (260)

Residual‐Lithium‐to‐LiF Conversion Enables a LiF–Fluorinated Carbon Interphase for Reconstruction‐Resistant Ni‐Rich Cathodes

Advanced Functional Materials, EarlyView.
A fluorine‐rich acrylate monomer (PFHEA) was solvent‐free applied to NCM90 and thermally decomposed under Ar to convert residual lithium into LiF and form a pre‐built LiF/fluorinated amorphous carbon (LiF/FC) interphase. The LiF/FC layer suppresses NiO rock‐salt reconstruction and microcrack propagation, lowers interfacial resistance, and improves Li ...
Pangyu Kim, Juyeon Han, Junhyeok Kim, Younghoon Kim, Eunha Seo, Dain Kim, Jeeyoung Yoo   +6 more
wiley   +1 more source

Analysis of Rietveld Method Application for Gyrolite Crystal Structure Refinement

Medžiagotyra, 2012
The several simulated X-ray diffraction patterns for calcium silicate hydrate – gyrolite were calculated with GSAS program using the structural model of natural mineral gyrolite and profile parameters values determined from refining crystal structure of ...
Arūnas BALTUŠNIKAS, Irena LUKOŠIŪTĖ, Rimantas LEVINSKAS, Albertas GRYBĖNAS, Kęstutis BALTAKYS, Anatolijus EISINAS   +5 more
doaj   +1 more source

Dual‐Salt Carbothermal Shock Strategy Enabling Ultrafast and Sustainable Regeneration of Spent LiFePO4 Cathode Materials

Advanced Functional Materials, EarlyView.
Lithium iron phosphate (LFP) accounts for over 50% of the global cathode market, underscoring the need for efficient recycling and regeneration. We propose a dual‐salt carbothermal shock (CTS) strategy using LiI and NaI to in situ repair Li vacancies.
Yanjuan Li, Zhongou Yang, Junhui Cai, Yiran Li, Zhenzhen Wu, Zhouyang Long, Xiao Yan, Shanqing Zhang   +7 more
wiley   +1 more source

Rietveld analysis and its application

Journal of the Mineralogical Society of Japan, 1983
A brief review has been presented on the Rietveld method and its recent development. It consists of (1) Introduction, (2) Recent development of the method, (3) Intensity measurements including pulsed neutron and synchroton radiation sources, (4) General principles and formula such as those for profile and preferred-orientation correction functions, (5)
openaire   +2 more sources

QUANTITATIVE ANALYSIS OF CEMENT HYDRATION BY XRD/RIETVELD ANALYSIS

Journal of Structural and Construction Engineering (Transactions of AIJ), 2008
In this study, Powder X-ray diffraction (XRD)/Rietveld analysis, which has been utilized in recent years as a technique for quantifying the crystal mineral phase of cement and cement paste, was applied to quantify the reaction rate of cement minerals and the proportions of hydration products. Its accuracy and availability was verified by comparing with
MATSUSHITA, Tetsuro, HIRAO, Hiroshi, MARUYAMA, Ippei, NOGUCHI, Takafumi   +3 more
openaire   +2 more sources

Interplay Between Phase Evolution, Fe Migration, and Oxygen Redox in O3‐Type NaxFeyMn1−yO2 Cathodes

Advanced Functional Materials, EarlyView.
Why do Na‐ion battery cathodes, that are compositionally closely related, follow different structural paths during battery operation? This work shows how Fe content controls when iron atoms migrate from their original sites. Early migration locks the layers and blocks key phase transitions, whereas delayed migration permits fuller structural ...
Morten Johansen, Maria Schou Hansen, Josephine Dunker, Rebekka Klemmt, Dorthe B. Ravnsbæk   +4 more
wiley   +1 more source

Rietveld texture analysis from diffraction images [PDF]

Zeitschrift für Kristallographie Supplements, 2007
The procedure to perform Rietveld texture analysis from diffraction images collected with CCDs or image plates is shown. In some cases only one transmission image may be sufficient to obtain an Orientation Distribution Function (ODF) if a sufficient number of peaks are included. The images are transformed in spectra and analyzed using the Maud Rietveld
Lutterotti, Luca, Bortolotti, Mauro, Ischia, Gloria, Lonardelli, Ivan, H. Wenk   +4 more
openaire   +1 more source

Application of Ibuprofen Sodium Dihydrate for Thermochemical Energy Storage

Advanced Functional Materials, EarlyView.
Ibuprofen sodium dihydrate is introduced as a durable organic salt hydrate for low‐temperature thermochemical energy storage, operating within 60°C–110°C with high energy density. At the material level, it delivers ∼99.9% cycling efficiency over 150 cycles without deliquescence, enabled by a dual energy‐storage mechanism coupling dehydration and phase ...
Kavin Chakravarthy Thangaraj, Hannah F. Chang, Shannon J. Lee, Mark E. Bowden, J. David Bazak, Vaithiyalingam Shutthanandan, Venkateshkumar Prabhakaran, Xiao Zhang, David M. Reed, Ajay S. Karakoti, Vijayakumar Murugesan   +10 more
wiley   +1 more source

Transformation of Goethite to Hematite Nanocrystallines by High Energy Ball Milling

Advances in Materials Science and Engineering, 2014
α-Fe2O3 nanocrystallines were prepared by direct transformation via high energy ball milling treatment for α-FeOOH powder. X-ray diffraction, Rietveld analysis, TEM, and vibrating sample magnetometer (VSM) are used to characterize the samples obtained ...
O. M. Lemine
doaj   +1 more source

Mixed‐Metal Promotion in a Manganese‐Molybdenum Oxynitride as Catalyst to Integrate C─C and C─N Coupling Reactions for the Direct Synthesis of Acetonitrile from Syngas and Ammonia

Advanced Materials, EarlyView.
Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje, Wilson Henao, Tania Rodenas, Patricia Concepción, Virginia Pérez Dieste, Alexander Missyul, Giovanni Agostini, Gonzalo Prieto   +7 more
wiley   +1 more source