Iron and Manganese Containing Multi‐Walled Carbon
Inside the tubes Fe 3 C particles are formed Fe and Mn oxides are incorporated in the carbon matrix and metal spinel nanoparticles cover the outer surface The best catalyst prepared at 800 °C achieves a low overpotential of 389 mV at 10 mA/cm 2 and high stability 22 6 h
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Facile Synthesis of Carbon Coated Spinel Li4Ti5O12/Rutile
The spinel Li4Ti5O12/rutile TiO2 carbon LTO RTO C composites were fabricated via a hydrothermal method combined with calcination treatment employing glucose as carbon source The carbon coating layer and the in situ formed rutile TiO2 can effectively enhance the electric conductivity and provide quick Li diffusion pathways for Li4Ti5O12
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CAA1Carbon coated lithium titanium spinel
The present invention relates to a carbon containing lithium titanium oxide containing spherical particle aggregates with a diameter of 1 80 µm consisting of lithium titanium oxide primary particles coated with carbon The present invention further relates to a method for the production of such a carbon containing lithium titanium oxide as well as an electrode containing such a carbon
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UNIVERSITY OF CALCUTTA
7 Spinel Coated Graphite for Carbon Containing Refractory Castables Journal of the American Ceramic Society 92 8 2009 8 Improved sol gel spinel MgAl 2 O 4 coatings on graphite for application in carbon containing high alumina
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A Review of Cathode and Anode Materials for Lithium Ion
are those based on carbon graphite and lithium alloyed metals One of the commercialized lithium alloyed metal is the oxide spinel Li4Ti5O12 the structure of which is shown in Fig 4 To avoid issues in the cycling and safety which are associated with dendrite formation on lithium anodes it is
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Characteristics of Refractory Castables Containing Mullite
The performance of high alumina castables containing mullite and spinel coated graphites was investigated to explore their commercial application in carbon containing refractory composites It was compared in terms of thermal shock resistance refractoriness under load static slag resistance test pore size distribution and physical properties e g apparent porosity and cold crushing strength
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Carbon transfer from magnesia graphite ladle refractories
Carbon in the form of graphite is often added to refractories to increase the slag corrosion resistance and thermal shock resistance of the refractory 1 4 5 6 7 8 Carbon containing refractories will often be the most economical and long lasting option due to these important properties Therefore ultra low carbon steel heats are often
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Improvement of Rheological Characteristics of Carbon
S Mukhopadhyay Improved sol gel spinel MgAl 2 O 4 coatings on graphite for application in carbon containing high alumina castables J Sol Gel Sci Technol 56 6674 2010 https //doi/10 1007/s CAS Article Google Scholar
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Characteristics of graphite based composite electrodes
Abstract Graphite GP based composite electrodes containing multi walled carbon nanotube MWCNT were prepared for vanadium redox flow batteries VRFB using polytetrafluoroethylene PTFE as binding agent Electrochemical performance of the GP MWCNT composite electrodes was characterized by chronoamperometry cyclic voltammetry and electrochemical impedance spectroscopy
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Carrier and Transition Metals M = Nb Cr and Fe Doping
Spinel Li4Ti5O12 LTO is one of the most promising candidate anode material for Li ion battery LIB known as zero strain material it has poor intrinsic electronic properties In order to enhance it we have investigated effect of doping on electronic conductivity of spinel LTO phase structure We consider the carrier and transition metal doping effect on structure and electronic structure
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TRU Group Graphite Graphene Consutants Graphite Plant
Graphite containing carbon carbon anode TRU Group Inc was working in high tech use of graphite in the early 2000 s when it assisted a start up to search for financing for a revolutionary lithium ion battery with a graphite containing carbon carbon anode
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Development of MgAl2O4 spinel coating on
Fig 6depicts the thermogravimetric curves for coated and uncoated samples The as received graphite starts to oxidize below 7008C with an oxidation rate of 0 066g/8C The oxidation of coated graphite samples with 1and 2wt of spinel begins respectively at
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Li4Ti5O12 spinel anodes Nature Energy
Li4Ti5O12 spinel was initially investigated as a cathode material for a rechargeable lithium battery It was later successfully exploited as an anode by the lithium ion battery industry to provide
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Crown Ether Functionalized Conductive Carbon for High
Crown Ether Functionalized Conductive Carbon for High Voltage Spinel LiMn1 5Ni0 5O4/Graphite Cell Hamidreza Saneifar † Karim Zaghib ‡ and Daniel Bélanger † †Département de Chimie Universite ́du Québec a ̀Montreal Case Postale 8888 succursale Centre Ville Montréal Que bec Canadá H3C 3P8 ‡Institut de Recherche d Hydro Québec IREQ 1800
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Development of MgAl2O4 spinel coating on graphite surface
The water wettability characteristic and the oxidation behavior of coated graphite particles showed their potential for application in carbon containing refractory castables Acknowledgments The authors gratefully acknowledge the financial support received
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Improved sol gel spinel MgAl 2 O 4 coatings on graphite
X ray photoelectron spectroscopy was performed to substantiate the elemental composition of spinel film over graphite Oxidation resistance and water wettability of coated graphite were examined respectively by thermogravimetry analysis and moisture requirement during installation of a carbon containing refractory castable composition
Get PriceCarbon Coated Li4Ti5O12 as a High Rate Electrode Material
In the case of carbon coated graphite it is typically discharged to several mV vs can intercalate into the coated carbon and the coated carbon also contributes the capacity together with the bulk graphite 13 In the current instance the cycle voltage window was controlled from 3 0 to vs the almost cannot intercalate into the carbon and
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DEVELOPMENT OF FUELED GRAPHITE CONTAINING PYROLYTIC CARBON
From American Nuclear Society Meeting New York Nov 1963 Progress is reported in several areas of development of fueled graphite containing coated particles for nonpurged gas cooled reactor systems The sol gel process has been modified for making spherical particles of
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Haldenwanger MgO Spinel Kiln Furniture Morgan Technical
Our MgO spinel can be used for products up to a temperature range of 1700oC and exhibits superior corrosion resistance particularly against alkalis and earth alkalis The properties of this material make it particularly good for products used within metal melting non iron and has shown to perform well in the melting of light metals containing
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Spinel Coated Graphite for Carbon Containing
Spinel Coated Graphite for Carbon Containing Refractory Castables Abstract Oxidation resistance and water wettability of graphite flakes have been improved by a thin sol–gel film of magnesium aluminate spinel MgAl2O4 over its surface
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Polypropylene Nanocomposite Filled with Spinel Ferrite
applications Hong M S et al 12 reported the carbon fibers in polypropylene matrix composites and their electromagnetic interference shielding characteristics Further a number of studies on EMI shielding properties of spinel ferrite with graphene have been reported by researchers 13–15
Get PriceDevelopment of mullite and spinel coatings on graphite for
The oxidation resistance of spinel coated graphite at 600 900 and 1200 °C was improved respectively to 5 0 7 5 and 22 0 and that of mullite coated graphite to 7 3 10 6 and 29 7 both of which are better than as received graphite 12 0 30 0 and 38 0 The moisture retention test inferred that water wettability in spinel and mullite coated graphite have been increased respectively
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Multi‐chambered carbon‐coated Ni0 4Fe2 6O4 nanoparticle
Herein hierarchically multichambered carbon coated Ni 0 4 Fe 2 6 O 4 NP superlattice microspheres M NFO C NSMs were prepared through the droplet based template method using Ni 0 4 Fe 2 6 O 4 NPs as the basic units the native organic ligands tethered to the NP surface were carbonized in situ to obtain uniform carbon coatings by calcination
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Alumina Carbon Refractory Castables Containing Calcium
Bull 48 2013 2583–2588 9 Mukhopadhyay S Improved sol gel spinel MgAl2O4 coatings on graphite for application in carbon containing high alumina castables J Sol Gel Sci Technol 56 2010 66–74 10 Dutta S et al Significant improvement of refractoriness of Al2O3–C castables containing calcium aluminate nano coatings on graphite
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Optimization of antioxidant additives in carbon containing
5 It is possible to obtain MgO based graphite containing castables with high magnesia content up to 90 MgO cement free 6 of carbon 1 to 2 metallic antioxidants 6 To achieve such performances in MgO M2 S C system the deflocculants used are a combination of sodium hexametaphosphate S6P Galoryl G and sodium dihydrogencitrate SD 7
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Nanostructured spinel manganese cobalt ferrite for high
Nanostructured spinel manganese cobalt ferrite for carbon based materials such as activated carbon graphite and graphene Energy is stored physically within a DC via a carbon coated copper grid and allowed to be evaporated at room temperature Fourier transform infrared FT IR spec
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PDF Spinel Coated Graphite for Carbon Containing
Soc 92 8 1895–1900 2009 DOI 10 1111/j 2009 03133 x r 2009 The American Ceramic Society Journal Spinel Coated Graphite for Carbon Containing Refractory Castables Sunanda Mukhopadhyay w Sarbasree Dutta Sheikh A Ansar Sumita Das and Susmita Misra Department of Chemical Technology University of Calcutta Kolkata 700 009 India Oxidation resistance and water wettability of graphite
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Facile Synthesis of Carbon Coated Spinel Li4Ti5O12/Rutile
The spinel Li4Ti5O12/rutile TiO2 carbon LTO RTO C composites were fabricated via a hydrothermal method combined with calcination treatment employing glucose as carbon source The carbon coating layer and the in situ formed rutile TiO2 can effectively enhance the electric conductivity and provide quick Li diffusion pathways for Li4Ti5O12
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Development of mullite and spinel coatings on
Spinel graphite reduces the chances of oxidation especially at 1000 8C coated graphite and mullite coated graphite were named Apart from sol–gel other methods for mullite coating from respectively as G0C and MC
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Keywords low carbon MgO C composites carbon coated Al2O3 powder spinel reaction volume stability I Introduction Graphite which has high thermal conductivity low thermal expansion low elasticity modulusandlow wet tability by molten slag is one of the important main ingredients for making carbon containing refractories 1
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1 Negative Electrodes for Li Ion Batteries Beyond Carbon
Among lithium titanium oxides spinel Li 4Ti 5O 12 LTO is one of the most studied electrode materials as a potential carbon/graphite replacement in LIBs for power applications such as electric vehicles 8 9 Lithium free tita nium oxides TiO 2 are still considerably investigated as electrode materi
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The success story of graphite as a lithium ion anode
The same concept also applies for the overlithiated spinel structured lithium nickel manganese oxide as demonstrated by Axmann and co workers 305 where the extra lithium introduced during solid state synthesis can be used to compensate the irreversible loss of e g silicon containing carbon composites with a net gain of 25 in specific
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UNIVERSITY OF CALCUTTA
7 Spinel Coated Graphite for Carbon Containing Refractory Castables Journal of the American Ceramic Society 92 8 2009 8 Improved sol gel spinel MgAl 2 O 4 coatings on graphite for application in carbon containing high alumina
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Development of MgAl2O4 spinel coating on graphite surface
In order to elucidate the nature of the compound formed on graphite surface the synthesis of MgAl 2 O 4 spinel via citrate–nitrate route was carried out without introducing the graphite and keeping all parameters as before Fig 2 shows the XRD patterns of synthesized material in different heat treatment conditions along with the precursor When the material dried up at 180 °C precursor
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Spinel‐Coated Graphite for Carbon Containing Refractory
After an easy to use mixing procedure drying 110°C and subsequent calcination 550°C coated graphites were sieved to below 75 μm The coating over the powder contained 1 5 wt MgAl 2 O 4 which enormously increased the oxidation resistance performed at 600° 900° and 1200°C and water wettability as revealed by hydrophilic functional groups from infrared spectra
Get PriceMulti‐chambered carbon‐coated Ni0 4Fe2 6O4 nanoparticle
Herein hierarchically multichambered carbon coated Ni 0 4 Fe 2 6 O 4 NP superlattice microspheres M NFO C NSMs were prepared through the droplet based template method using Ni 0 4 Fe 2 6 O 4 NPs as the basic units the native organic ligands tethered to the NP surface were carbonized in situ to obtain uniform carbon coatings by calcination
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