Relevant bibliographies by topics / Olivine – Electric properties

Academic literature on the topic 'Olivine – Electric properties'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Olivine – Electric properties"

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Anh Nguyen, Hoang, Pham Phuong Nam Le, Le Thanh Nguyen Huynh, Tran Van Man, and My Loan Phung Le. "Investigation of Na-immigration into olivine LiFePO4." Science and Technology Development Journal - Natural Sciences 3, no. 1 (April 26, 2019): 46–54. http://dx.doi.org/10.32508/stdjns.v3i1.724.

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In 21th century, rechargeable batteries are main key of modern technology in many applications from portable devices (smartphone, laptop) to large-scale (hydride electric vehicle-HEV, smart grid system). Among the rechargeable batteries, Li-ion battery (LIB) is outstanding member due to the highest gravimetric as well as volumetric capacity; and Sodium-ion batteries (SIBs) can have contribution to alternating LIBs in large-scale application. Li-ion and Na-ion batteries have the same configuration with an insertion/extraction reversible of Li+ ions and Na+ ions into electrode positive and negative during charge-discharge process. This work aimed to investigate Na-immigration into olivine LiFePO4. The olivine phase LiFePO4 was prepared by hydrothermal process. The synthesized LiFePO4 was characterized the structure, morphology and electrochemical properties. The XRD pattern showed the high crystalline and, the Rietveld refinement with X2 = 2.32% confirmed the highly pure olivine phase without impurity. The SEM images exhibited the uniform and good distribution of synthesized olivine in submicrometric scale. The delithiated phase FePO4 was prepared by electrochemical oxidation at low rate C/20. The charge-discharge curves demonstrated the reversible Na-immigration into olivine host with a highest capacity of 80 mAh/g, the cyclability was found out in 73 mAh/g upon 30 cycles. The ex-situ XRD (electrode after electrochemical oxidation, electrode after Na-insertion) revealed the stability of FePO4 framework during Na-immigration.
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Nizhegorodov, A. I. "Modeling of the optical properties of the vermiculite-sungulitovyh conglomerates with their thermal activation in electric furnaces." NOVYE OGNEUPORY (NEW REFRACTORIES), no. 1 (April 26, 2019): 12–25. http://dx.doi.org/10.17073/1683-4518-2019-1-12-25.

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The fundamentals of technology and theory of the process of thermal activation of a vermiculite-sungulite conglomerate contained in the waste of the Kovdorsky phlogopitevermiculite deposit are considered. An analytical-physical model of a single-layer flow of vermiculite-sugulite conglomerate, vibro-transported in a thermal field using a vibration hearth platform of an electric furnace, has been built. The absorption and reflectivity of a dense singlelayer array of the processed conglomerate located on a plane under thermal radiation conditions are determined. For example, Sungulite, Pyroxene, Olivine, and a number of other minerals, the correlation of their absorption capacities with the relative thermal diffusivity and thermal conductivity of these minerals is shown. Ill. 2. Ref. 14.
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Gu, Yi Jie, Cui Song Zeng, Yu Bo Chen, Hui Kang Wu, Hong Quan Liu, Lin Chen, Meng Wang, et al. "High Discharge Rate Lithium Ion Batteries with the Composite Cathode of LiFePO4/Mesocarbon Nanobead." Advanced Materials Research 177 (December 2010): 208–10. http://dx.doi.org/10.4028/www.scientific.net/amr.177.208.

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Olivine compounds LiFePO4 were prepared by the solid state reaction, and the electrochemical properties were studied with the composite cathode of LiFePO4/mesocarbon nanobead. High discharge rate performance can be achieved with the designed composite cathode of LiFePO4/mesocarbon nanobead. According to the experiment results, batteries with the composite cathode deliver discharge capacity of 1087mAh for 18650 type cell at 20C discharge rate at room temperature. The analysis shows that the uniformity of mesocarbon nanobead around LiFePO4 can supply enough change for electron transporting, which can enhance the rate capability for LiFePO4 cathode lithium ion batteries. It is confirmed that lithium ion batteries with LiFePO4 as cathode are suitable to electric vehicle application.
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Zeng, Zhi Feng, Hai Yan Zhang, and Xi Duo Hu. "A Study on the Electrochemical Properties of LiFePO4 Doping with Different Diameter MWCNTs." Advanced Materials Research 311-313 (August 2011): 1393–97. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.1393.

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The LiFePO4/MWCNTs composite used as cathode was synthesized by ball milling. XRD and SEM experiments demonstrated that MWCNTs didn’t change the olivine structure of LiFePO4and that MWCNTs decentralized into the grains of LiFePO4and working as electric bridge improving the electrochemical properties of LiFePO4. The electrochemical performance of the composite electrodes with different MWNTs in diameter were studied by button cell. The result indicated that the composite with largest diameter MWNTs exhibited best electrochemical performance. The first charge-discharge specific capacity of the composite with MWNTs of 60-100nm in diameter were 136mAh/g-1 and 129 mAh/g-1 respectively at 0.1C rate under room temperature. The difference between charge-discharge platforms of the composite electrode was the least compared to the others. This phenomenon showed that the material had the largest chemical diffusion coefficient of lithium. At the same time, the capacity of the composite only lost 4.0％ after 10 cycles and kept constant after 20 cycles.
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Pietrzak, Tomasz K., Marek Wasiucionek, and Jerzy E. Garbarczyk. "Towards Higher Electric Conductivity and Wider Phase Stability Range via Nanostructured Glass-Ceramics Processing." Nanomaterials 11, no. 5 (May 17, 2021): 1321. http://dx.doi.org/10.3390/nano11051321.

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This review article presents recent studies on nanostructured glass-ceramic materials with substantially improved electrical (ionic or electronic) conductivity or with an extended temperature stability range of highly conducting high-temperature crystalline phases. Such materials were synthesized by the thermal nanocrystallization of selected electrically conducting oxide glasses. Various nanostructured systems have been described, including glass-ceramics based on ion conductive glasses (silver iodate and bismuth oxide ones) and electronic conductive glasses (vanadate-phosphate and olivine-like ones). Most systems under consideration have been studied with the practical aim of using them as electrode or solid electrolyte materials for rechargeable Li-ion, Na-ion, all-solid batteries, or solid oxide fuel cells. It has been shown that the conductivity enhancement of glass-ceramics is closely correlated with their dual microstructure, consisting of nanocrystallites (5–100 nm) confined in the glassy matrix. The disordered interfacial regions in those materials form “easy conduction” paths. It has also been shown that the glassy matrices may be a suitable environment for phases, which in bulk form are stable at high temperatures, and may exist when confined in nanograins embedded in the glassy matrix even at room temperature. Many complementary experimental techniques probing the electrical conductivity, long- and short-range structure, microstructure at the nanometer scale, or thermal transitions have been used to characterize the glass-ceramic systems under consideration. Their results have helped to explain the correlations between the microstructure and the properties of these systems.
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Zaghib, Karim, Michel L. Trudeau, M. V. Reddy, Alain Mauger, Christian Julien, and Michel Armand. "(Invited) John B. Goodenough's Centenarian : Success Story of LiFePO4 (LFP) As Cathode Material for Rechargeable Lithium Batteries." ECS Meeting Abstracts MA2022-01, no. 2 (July 7, 2022): 356. http://dx.doi.org/10.1149/ma2022-012356mtgabs.

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Lithium-ion and solid-state battery (SSB) are now playing a central role in consumer electronic, energy storage and electric vehicles thanks to their excellent cycle life and high energy density. One of the key components that have paved the way for this success story in the past 27 years is LiFePO4 (LFP) which has served as a lithium-ion host structure for the cathode electrode. Today only LFP is used in both commercial Li-ion and SSB batteries, due their safety, low cost (cobalt free), fast charge and discharge, and over 20 years of calendar life. In this presentation, we will show the progress of the physical chemistry of the olivine compounds since the pioneering work of Prof. John B. Goodenough. This major improvement has positioned LiFePO4 as the active cathode element of a new generation of Li-ion batteries from cell to pack, hence making a breakthrough in the technology of energy storage and electric transportation. This achievement is the fruit of about 27 years of intensive research in the electrochemical community during which chemists, electrochemists, physicists, and engineers added their efforts to understand the properties of the material, to overcome the obstacles that were met on the way, and finally to reach the state of the art enabling its ubiquitous use in technology today and in the future.
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Torabi, Morteza, Alireza Tavakkoli Neyshabouri, Bahram Soltan Mohammad, S. H. Razavi, and Mansoor Kianpour Rad. "Effect of Milling on the Electrochemical Properties of Nanostructured Li(Fe0.8Mn0.2)PO4 as Cathodes for Li-ion Batteries." Journal of New Materials for Electrochemical Systems 20, no. 1 (April 22, 2017): 039–42. http://dx.doi.org/10.14447/jnmes.v20i1.293.

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Phospho-olivine Li(Fe0.8Mn0.2)PO4 was synthesized using high-temperature solid state procedure. Ball milling was used to decrease the particle size of the active material. X-ray diffraction (XRD) confirmed formation of the phospho-olivines. The crystallite size of the ball-milled particles was calculated about 64.9 nm. Scanning electron microscopy (SEM) also showed polygonal particles of the ball-milled Li(Fe0.8Mn0.2)PO4 and homogeneous distribution of the iron and manganese. Electrochemical evaluation of the ball-milled Li(Fe0.8Mn0.2)PO4 demonstrated faster kinetic reaction with respect to the as-synthesized Li(Fe0.8Mn0.2)PO4. The ball milling process led to highest capacity between the samples (150 mAh g-1 at 0.1 mA cm-2); however, annealing the ball-milled samples showed the best cyclic performance (3% fading after 50 cycles). Ball milling process caused nanostructured Li(Fe0.8Mn0.2)PO4 with lower diffusion length, higher electrical conductivity and higher capacity.
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Pawlicki, L. T., R. M. Siegoczyński, S. Ptasznik, and K. Marszałek. "Electric properties of olive oil under pressure." European Food Research and Technology 247, no. 8 (May 7, 2021): 1933–37. http://dx.doi.org/10.1007/s00217-021-03761-7.

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AbstractThe main purpose of the experiment was a thermodynamic research with use of the electric methods chosen. The substance examined was olive oil. The paper presents the resistance, capacitive reactance, relative permittivity and resistivity of olive. Compression was applied with two mean velocities up to 450 MPa. The results were shown as functions of pressure and time and depicted on the impedance phase diagram. The three first order phase transitions have been detected. All the changes in material parameters were observed during phase transitions. The material parameters measured turned out to be the much more sensitive long-time phase transition factors than temperature. The values of material parameters and their dependence on pressure and time were compared with the molecular structure, arrangement of molecules and interactions between them. Knowledge about olive oil parameters change with pressure and its phase transitions is very important for olive oil production and conservation.
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KIMURA, MUNEHIRO, KONRAD ŚWIERCZEK, JACEK MARZEC, and JANINA MOLENDA. "INFLUENCE OF ALUMINUM ON PHYSICO-CHEMICAL PROPERTIES OF LITHIUM IRON PHOSPHATE." Functional Materials Letters 04, no. 02 (June 2011): 123–27. http://dx.doi.org/10.1142/s1793604711001877.

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In this work we present results of measurements of structural (XRD), microstructural (SEM, EDX, TEM) and transport (electrical conductivity, Seebeck coefficient) properties as well as results of Mössbauer and FTIR spectroscopy studies of phospho-olivine materials with assumed chemical composition Li 1-3x Al x FePO 4 (x = 0, 0.001, 0.005, 0.01, 0.02, 0.05 and 0.1). Based on the performed research, possibility of lithium sublattice doping by Al is discussed. Additionally, initial results of electrochemical tests of lithium batteries with obtained, phospho-olivine based cathode materials are provided.
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MOLENDA, JANINA, and JACEK MARZEC. "FUNCTIONAL CATHODE MATERIALS FOR Li-ION BATTERIES — PART II: LiFePO4 AND ITS COMPOSITE." Functional Materials Letters 01, no. 02 (September 2008): 97–104. http://dx.doi.org/10.1142/s1793604708000186.

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The paper presents a review of the structural, electrical and electrochemical properties of LiFePO 4 pospho-olivine dopped with W , Ti , Al and manganese substituted LiFe 1-y Mn y PO 4, synthesized at high temperatures as well as preparation method of LiFePO 4– Fe 2 P composite phases. The nature of the metallic type conductivity of doped phospho-olivine is discussed and some fundamental arguments against the bulk nature of the observed high electronic conductivity are presented.
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Dissertations / Theses on the topic "Olivine – Electric properties"

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QUINA, ANTONIO de J. A. de. "Estudos das Propriedades de Termoluminescência (TL), Ressonância Paramagnética (EPR) e Absorção Ótica (AO) para caracterização do mineral Monticelita." reponame:Repositório Institucional do IPEN, 2016. http://repositorio.ipen.br:8080/xmlui/handle/123456789/26943.

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Submitted by Marco Antonio Oliveira da Silva (maosilva@ipen.br) on 2016-12-22T12:40:27Z No. of bitstreams: 0
Made available in DSpace on 2016-12-22T12:40:27Z (GMT). No. of bitstreams: 0
Foram estudados as propriedades de absorção ótica, de termoluminescência e de ressonância paramagnética eletrônica do mineral natural de silicato de nome MONTICELITA do grupo Olivina, para caracterização desse mineral, cuja formula química é CaMgSiO4. A absorção ótica mostrou que há três bandas de absorção em 450 nm, 660 nm e 1050 nm. As duas primeiras bandas, a primeira no azul e a segunda no amarelo-vermelho são responsáveis pela cor verde da Monticelita. Essas duas bandas são consequência do elemento cromo contido no mineral absorver fótons do feixe universal no visível de frequências centradas em 450 nm e 660 nm. A banda em 1050 nm é devido ao Fe2+. As curvas de emissão de uma amostra de Monticelita irradiada com raios gama de doses entre 10 e 1000 Gy apresenta três picos em 150 °C , 270 °C e 370 °C . Pelo método da deconvolução e de várias taxas de aquecimento foram obtidos energia E1=1,35 eV e fator de frequência s1=4,98x1011 s-1 para o pico 270 °C e E2=1,70 eV e s2=1,88x1011 s-1 para pico 370 °C . A irradiação com raios gama de doses entre 5 kGy e 50 kGy produziram pico TL de 380 °C com intensidade TL em função da dose linear e crescente. Este resultado e importante para dosimetria da radiação de altas doses. O espectro EPR de uma amostra natural, mostrou um resultado não esperado e interessante. Além dos sinais típicos de interação hiperfina do Mn2+, um sinal avantajado de g =6,34 indica que o ferro formou moléculas de hematita, Fe2O3. Esse sinal desaparece com aquecimento acima de 800 °C de recozimento, dando origem dipolos magnéticos de Fe3+, que dá origem a um sinal típico em g =2. Esta descrição mostra bem a caracterização do mineral Monticelita.
Dissertação (Mestrado em Tecnologia Nuclear)
IPEN/D
Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP
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Book chapters on the topic "Olivine – Electric properties"

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Tossell, John A., and David J. Vaughan. "Applications to Silicate, Carbonate, and Borate Minerals and Related Species." In Theoretical Geochemistry. Oxford University Press, 1992. http://dx.doi.org/10.1093/oso/9780195044034.003.0007.

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The most abundant materials making up the crust of the earth (i.e., the “rock-forming minerals”) can be regarded as dominated by oxyanion units; notably, the units that can be formally represented by SiO44- and AlO45- clusters of the silicate minerals, and the CO32- unit of the carbonates. less common, but geochemically interesting, oxyanion units include, for example, BO33-, BeO46- , and PO43-. in this chapter, applications of quantum-mechanical calculations and experimental techniques to such materials are considered. first, the silicates are discussed, commencing with the large amount of work undertaken on the olivines, before considering such work as has so far been done on the other silicate minerals and related materials. second, the most important of the nonsilicate rock-forming mineral groups, the carbonates, are discussed. finally, although of less petrological importance but interesting geochemically and in terms of contrast with the othergroups, the borates and related species are considered. in each case, geometric aspects of structure and the problems of calculating structural properties are considered before going on to consider electronic structures and the factors controlling stabilities and a wider range of physical properties. in all of these materials, there is considerable interest in the, bonding in the oxyanion unit and how this is affected by, and controls, the interaction with counterions or the polymeric units. the building up of the minerals by such interactions exerts the dominant control over their crystal chemistries and properties and thus forms a central theme of this chapter. the silicate minerals are, of course, characterized by the presence of the tetrahedral siO4 cluster unit and the crystal chemistry and classification of silicates dominated by the structures built up by the linking together (polymerization) of these units. in the “simplest” of the silicates, the island silicates such as the olivine minerals (dominated by the forsterite (Mg2 SiO4)-fayalite (Fe2SiO4) solid solution series), the sio4 units are isolated by counterions such as Mg2+, Fe2+, Ca2+.
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Newnham, Robert E. "Diffusion and ionic conductivity." In Properties of Materials. Oxford University Press, 2004. http://dx.doi.org/10.1093/oso/9780198520757.003.0021.

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The phenomenon of atomic and ionic migration in crystals is called solidstate diffusion, and its study has shed light on many problems of technological and scientific importance. Diffusion is intimately connected to the strength of metals at high temperature, to metallurgical processes used to control alloy properties, and to many of the effects of radiation on nuclear reactor materials. Diffusion studies are important in understanding the ionic conductivity of the materials used in fuel cells, the fabrication of semiconductor integrated circuits, the corrosion of metals, and the sintering of ceramics. When two miscible materials are in contact across an interface, the quantity of diffusing material which passes through the interface is proportional to the concentration gradient. The atomic flux J is given by where J is measured per unit time and per unit area, c is the concentration of the diffusing material per unit volume, and Z is the gradient direction. The proportionality factor D, the diffusion coefficient, is measured in units of m2/s. This equation is sometimes referred to as Fick’s First Law. It describes atomic transport in a form that is analogous to electrical resistivity (Ohm’s Law) or thermal conductivity. There are several objections to Fick’s Law, as discussed in Section 19.5. Strictly speaking, it is valid only for self-diffusion coefficients measured in small concentration gradients. Since J and Z are both vectors, the diffusion coefficient D is a second rank tensor. As with other symmetric second rank tensors, between one and six measurements are required to specify Dij , depending on symmetry. The relationship between structure and anisotropy is more apparent in PbI2. Lead iodide is isostructural with CdI2 in trigonal point group.m. The self-diffusion of Pb is much easier parallel to the layers where the Pb atoms are in close proximity to one another. Diffusion is more difficult along Z3 = [001] because Pb atoms have a very long jump distance in this direction. The mineral olivine, (Mg, Fe)2SiO4, is an important constituent of the deeper parts of the earth’s crust.
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Pierpauli, K., C. Rinaldi, M. L., and A. Lamag. "Innovative Technique Combining Laser Irradiation Effect and Electronic Nose for Determination of Olive Oil Organoleptic Characteristics." In Olive Oil - Constituents, Quality, Health Properties and Bioconversions. InTech, 2012. http://dx.doi.org/10.5772/30615.

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Conference papers on the topic "Olivine – Electric properties"

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Ctibor, P., J. Sedláček, K. Neufuss, J. Dubský, and P. Chráska. "Study of Dielectric Properties of Plasma Sprayed Silicates at Low Voltage." In ITSC2002, edited by C. C. Berndt and E. Lugscheider. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 2002. http://dx.doi.org/10.31399/asm.cp.itsc2002p0617.

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Abstract This paper examines the dielectric properties of silicate coatings including mullite (3Al2O3-2SiO2), steatite (MgSiO3), spodumene (Li2O-Al2O3-4SiO2), and olivine with near-forsterite (Mg2SiO4) composition. The materials were sprayed using a water-stabilized plasma gun and the deposits were removed from the substrate, polished, and sputtered with aluminum on both sides. Electrical tests consisting of voltage, resistance, and capacitance measurements showed that the relative conductivity of plasma-sprayed silicates is stable between 200 Hz and 1 MHz, which is suitable for many insulation applications. Paper includes a German-language abstract.
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Sánchez Lucas, Rosa, Cristina López-Hidalgo, María Benlloch-González, and Jesús V. Jorrín-Novo. "Can the increment of temperature associated to climate change alter the olive oil chemical composition and its nutritional and nutraceutical properties?" In 3rd International Electronic Conference on Metabolomics. Basel, Switzerland: MDPI, 2018. http://dx.doi.org/10.3390/iecm-3-05851.

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