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lithium
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An improved synthesis of cyanohydrins in the presence of solid LiClO4 under solvent-free conditions
, Article Journal of Organometallic Chemistry ; Volume 688, Issue 1-2 , 2003 , Pages 283-285 ; 0022328X (ISSN) ; Saidi, M. R ; Sharif University of Technology
Elsevier
2003
Abstract
Several cyanohydrins were synthesized by the reaction of trimethylsilyl cyanide with carbonyl compounds in the presence of solid lithium perchlorate in high yields under solvent-free conditions. © 2003 Published by Elsevier B.V
Lithium iron silicate sol–gel synthesis and electrochemical investigation
, Article Journal of Alloys and Compounds ; Volume 672 , 2016 , Pages 93-97 ; 09258388 (ISSN) ; Baniasadi, F ; Asgari, S ; Sharif University of Technology
Elsevier Ltd
Abstract
Li2FeSiO4 was synthesized through Sol–Gel method and the effect of calcination temperature, time and chelating agent concentration were investigated. Appropriate calcination temperature above 550 °C was determined by TG/DTA analysis. Afterward, the dried gel powder was calcined at each temperature of 650 °C, 700 °C and 750 °C for 1, 2 and 3 h. XRD studies illustrated the most appropriate calcination temperature of 700 °C for 1 h. To compare the effect of chelating agent concentration, citric acid with molar ratio of 1/3, 2/3 and 1 were used which 1/3 was determined as the best concentration. FE-SEM observation showed that mean grain is size lower than 100 nm. By using this material, a three...
Reductive amination of aldehydes with sodium borohydride and lithium aluminum hydride in the presence of lithium perchlorate
, Article Journal of the Iranian Chemical Society ; Volume 4, Issue 2 , 2007 , Pages 194-198 ; 1735207X (ISSN) ; Brown, R. S ; Ziyaei Halimjani, A ; Sharif University of Technology
Iranian Chemical Society
2007
Abstract
A one-pot high yielding reductive amination of aldehydes with primary and secondary amines using LiClO4/NaBH4 and LiClO 4/LiAlH4 as reducing agents in diethyl ether is described
A simple, economical, and highly efficient synthesis of β-hydroxynitriles from epoxide under solvent free conditions
, Article Journal of Molecular Catalysis A: Chemical ; Volume 247, Issue 1-2 , 2006 , Pages 159-161 ; 13811169 (ISSN) ; Azizi, N ; Saidi, M. R ; Sharif University of Technology
2006
Abstract
A simple, rapid, and highly regioselective green protocols for the synthesis of β-hydroxylnitriles by the direct reaction of epoxides with trimethylsilyl cyanide in the presence of catalytic amount of lithium perchlorate under solvent free conditions in high to quantitative yield is reported. © 2005 Elsevier B.V. All rights reserved
Understanding non-ideal voltage behaviour of cathodes for lithium-ion batteries
, Article Journal of Materials Chemistry A ; Vol. 2, issue. 45 , Sep , 2014 , p. 19451-19460 ; Oghbaei, M ; Asgari, S ; Ferrari, S ; Capsoni, D ; Mustarelli, P ; Sharif University of Technology
Abstract
One of the most relevant negative characteristics of high-capacity cathodes for lithium batteries is indeed non-flat voltage-time (V-t) or voltage-capacity (V-C) behaviour during charge-discharge. A clear rationale for this behaviour has not yet been addressed in the literature. Here, by means of density functional theory (DFT) calculations corroborated by basic experimental electrochemical characterization, we investigated both the thermodynamic and the kinetic aspects relevant to voltage variations during charge-discharge of Li2FeSiO4 intended as a model case. A simple physical model allowed us to take into account all the experimental evidence. We suggested that voltage deviations from...
A novel procedure for conversion of epoxides to α -hydroxyphosphonates with a trialkylphosphite mediated by LiClO4
, Article Tetrahedron Letters ; Volume 44, Issue 43 , 2003 , Pages 7933-7935 ; 00404039 (ISSN) ; Saidi, M. R ; Sharif University of Technology
Elsevier Ltd
2003
Abstract
A new method has been developed for the direct conversion of epoxides to α-hydroxyphosphonates by the reaction of a trialkylphosphite with the epoxide in 5 M lithium perchlorate in diethyl ether (LPDE). The reaction is highly regioselective and efficient with excellent yields under mild and neutral conditions. © 2003 Published by Elsevier Ltd
A simple one-pot three-component reaction for preparation of secondary amines and amino esters mediated by lithium perchlorate
, Article Tetrahedron ; Volume 57, Issue 31 , 2001 , Pages 6829-6832 ; 00404020 (ISSN) ; Azizi, N ; Zali Boinee, H ; Sharif University of Technology
2001
Abstract
The one-pot synthesis of several secondary amines and secondary amino esters are reported. Treatment of aldehydes (aliphatic or aromatic) with (trimethylsilyl)alkylamines, in the presence of 5 M lithium perchlorate in diethyl ether gives intermediate imines. Reaction of these intermediate imines with different nucleophiles and functionalized organozinc reagents, BrZnCH2COOR, produce a variety of secondary amines and N-alkyl- or N-arylamino esters in good yields. © 2001 Elsevier Science Ltd. All rights reserved
Lithium Recovery from Brine Sources of Iran by Precipitation Method
, M.Sc. Thesis Sharif University of Technology ; Askari, Masoud (Supervisor)
Abstract
Lithium is one of the most commonly used metals in industry with a wide variety of applications including batteries, lubricating grease and pharmaceutical products. Demand for lithium is expected to rise with the increasing adoption of electric vehicles. Market reports have predicted that world lithium demand will increase by 2.5 times from 2010 to 2020. Therefore, there is a pressing need to develop new sources of lithium to support this anticipated increase in demand. Lithium can be extracted from salt brine and lithium containing minerals as lithium compounds.
Salt brines are the most abundant lithium sources available in the world, comprising about 60% of all known lithium deposits....
Salt brines are the most abundant lithium sources available in the world, comprising about 60% of all known lithium deposits....
A simple, economical, and highly efficient synthesis of β-hydroxynitriles from epoxide under solvent free conditions [electronic resource]
, Article Journal of Molecular Catalysis A: Chemical ; 2006, Volume 247, Issues 1–2, Pages 159–161 ; Azizi, N ; Saidi, M. R ; Sharif Univercity of Technology
Abstract
A simple, rapid, and highly regioselective green protocols for the synthesis of β-hydroxylnitriles by the direct reaction of epoxides with trimethylsilyl cyanide in the presence of catalytic amount of lithium perchlorate under solvent free conditions in high to quantitative yield is reported
Aminoalkylation with aldehydes mediated by solid lithium perchlorate
, Article Monatshefte fur Chemie ; Volume 135, Issue 3 , 2004 , Pages 309-312 ; 00269247 (ISSN) ; Nazari, M ; Sharif University of Technology
2004
Abstract
The solid LiClO4-mediated one-pot reaction of aldehydes with secondary amines and C nucleophiles afforded the corresponding aminoalkylation products in high yields. Unlike the previous reported procedure, the aminoalkylation of aldehyde was achieved in the presence of only 0.5 equivalents of solid lithium perchlorate in dichloromethane as the solvent with good to high yields at room temperature. © Springer-Verlag 2003
LiClO4 accelerated Michael addition of amines to α,β-unsaturated olefins under solvent-free conditions
, Article Tetrahedron ; Volume 60, Issue 2 , 2004 , Pages 383-387 ; 00404020 (ISSN) ; Saidi, M. R ; Sharif University of Technology
Elsevier Ltd
2004
Abstract
Several primary and secondary amines were added to α,β- unsaturated esters, nitriles, amides, and ketones to give the corresponding saturated amines mediated by solid lithium perchlorate under solvent-free and environmentally friendly conditions at room temperature. © 2003 Elsevier Ltd. All rights reserved
Synthesis of tertiary α-amino phosphonate by one-pot three-component coupling mediated by LPDE
, Article Tetrahedron ; Volume 59, Issue 28 , 2003 , Pages 5329-5332 ; 00404020 (ISSN) ; Saidi, M. R ; Sharif University of Technology
Elsevier Ltd
2003
Abstract
A very mild, efficient and simple method for the synthesis of tertiary α-amino phosphonates is reported by reaction of an aldehyde, a secondary amine and trialkylphosphite in ethereal solution of lithium perchlorate, LPDE, at ambient temperature with high yields. © 2003 Elsevier Science Ltd. All rights reserved
Lithium perchlorate diethyl ether solution: A highly efficient media for the abramov reaction
, Article Phosphorus, Sulfur and Silicon and the Related Elements ; Volume 178, Issue 6 , 2003 , Pages 1255-1259 ; 10426507 (ISSN) ; Saidi, M. R ; Sharif University of Technology
2003
Abstract
The α-hydroxy phosphonates are readily prepared by treating aromatic or aliphatic aldehydes and ketones with trialkylphosphite in the presence of trimethylsilylchloride in a very short time and in almost quantitative yields
Lithium perchlorate mediated three-component preparation of primaryaminoesters
, Article Molecules ; Volume 7, Issue 1 , 2002 , Pages 72-74 ; 14203049 (ISSN) ; Azizi, N ; Sharif University of Technology
Molecular Diversity Preservation International
2002
Abstract
A three-component reaction between an aldehyde, metallated hexamethyldisilazane and a functionalized organozinc compound proceeded smoothly in the presence of LiClO4 in diethyl ether to afford primary amino esters in good yields
A new protocol for a one-pot synthesis of α-amino phosphonates by reaction of imines prepared in situ with trialkylphosphites
, Article Synlett ; Issue 8 , 2002 , Pages 1347-1349 ; 09365214 (ISSN) ; Azizi, N ; Sharif University of Technology
Georg Thieme Verlag
2002
Abstract
Imines prepared in situ by reaction of aldehydes and ketones with primary amines in ethereal solution of LiClO4 react readily at ambient temperature with trialkylphosphite to give high yields of α-amino phosphonates
Preparation of aminovinyl phosphonates by four-component aminoalkylation of aldehydes mediated by lithium perchlorate
, Article Synthetic Communications ; Volume 30, Issue 21 , 2000 , Pages 3849-3854 ; 00397911 (ISSN) ; Najjar, R ; Sharif University of Technology
Marcel Dekker Inc
2000
Abstract
Several aminovinyl phosphonates were prepared in good yield by four-component aminoalkylation of aldehydes with diethyl(trimethylsilyl)amine, triethylphosphite and dimethyl acetylenedicarboxylate mediated by a 5 molar solution of lithium perchlorate in diethyl ether
Lithium perchlorate promoted highly regioselective ring opening of epoxides under solvent-free conditions
, Article Catalysis Communications ; Volume 8, Issue 12 , December , 2007 , Pages 2198-2203 ; 15667367 (ISSN) ; Mirmashhori, B ; Saidi, M. R ; Sharif University of Technology
2007
Abstract
A simple and efficient synthesis of diol diesters, protected chlorohydrins, chlorohydrins and β-hydroxy azides with acetyl or benzoyl, TMSN3 and TMSCl groups has been achieved by ring opening of epoxides with acetic anhydride, acetyl chloride or benzoyl chloride and TMSN3 using catalytic amount of lithium perchlorate under solvent-free conditions. All reactions proceeded in short times and afforded the corresponding products in good to excellent yields under mild reaction conditions. LiClO4 shows enhanced reactivity for the ring opening of epoxides under solvent-free conditions, therefore, reducing the reaction times dramatically and improved the yields and amount of catalyst. © 2007...
Corrosion of Aluminum Foil (99% Purity) in Lithium Ion Batteries with Lithium Hexafluorophosphate Electrolyte ()
, M.Sc. Thesis Sharif University of Technology ; Ghorbani, Mohammad (Supervisor) ; Riyahifar, Reza (Co-Supervisor) ; Raeesi, Babak (Co-Supervisor)
Abstract
One of the problems that affects the lifetime and cycle life of lithium ion batteries is the localized corrosion of aluminum current collector (during the storage and charging cycle). Since applying corrosion-resistant coating has always been one of the ways to reduce corrosion of materials in different environments, in the present project, this method has been used to prevent corrosion of aluminum in lithium-ion batteries. For this purpose, the graphene oxide coating, which has desirable anti-corrosion properties, was coated on aluminum by Electrophoretic deposition and doctor blade methods. linear polarization, cyclic voltammetry and electrochemical impedance spectroscopy were performed to...
A theoretical approach to evaluate the rate capability of Li-ion battery cathode materials
, Article Journal of Materials Chemistry A ; Vol. 2, issue. 1 , 2014 , pp. 107-115 ; ISSN: 20507488 ; Asgari, S ; Mustarelli, P ; Sharif University of Technology
Abstract
Charge-discharge rate capability is one of the most important properties of cathode materials for lithium batteries, in particular when envisaging high power density applications such as automotive applications. Efforts to modify rate have been carried out by carbon coating and decreasing particle size in order to modify electronic and ionic conductivity. However, this approach cannot justify all experimental data reported in the literature. Here, we investigated the rate capability of cathode materials by considering their density of states (DOS) calculated by several density functional theory (DFT) methods, in both the lithiated and the delithiated case. We suggested that these structures...
Synthesis of anodized TIO2 nanotube arrays as ion sieve for lithium extraction
, Article ChemistrySelect ; Volume 5, Issue 33 , 2020 , Pages 10339-10345 ; Taghvaei, E ; Askari, M ; Sharif University of Technology
Wiley-Blackwell
2020
Abstract
Titanium type lithium ion-sieve nanotubes synthesized by the hydrothermal method were extensively explored over recent years due to its promising properties. However, on account of nanotubes′ tangled structure impeding the lithium adsorption in the interior nanotube walls, unalterable dimensions of the synthesized nanotubes, and a long period of annealing, the anodizing technique was proposed. It is shown that lithium uptake and adsorption capacity is improved because of easier mass transfer during the ion exchange process. This work focuses on a novel anodizing method for nanotube ion-sieve synthesis. The optimum anodizing condition was discovered by altering anodizing voltage, time, and...