The Experts below are selected from a list of 31659 Experts worldwide ranked by ideXlab platform
Bingqing Wei - One of the best experts on this subject based on the ideXlab platform.
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facile synthesis of v2o5 hollow spheres as advanced cathodes for high performance lithium ion batteries
2017Co-Authors: Xingyuan Zhang, Jiangan Wang, Huanyan Liu, Hongzhen Liu, Bingqing WeiAbstract:Three-dimensional V2O5 hollow structures have been prepared through a simple synthesis strategy combining solvothermal treatment and a subsequent thermal annealing. The V2O5 materials are composed of microspheres 2–3 μm in diameter and with a distinct hollow interior. The as-synthesized V2O5 hollow microspheres, when evaluated as a cathode material for lithium-ion batteries, can deliver a specific capacity as high as 273 mAh·g−1 at 0.2 C. Benefiting from the hollow structures that afford fast Electrolyte Transport and volume accommodation, the V2O5 cathode also exhibits a superior rate capability and excellent cycling stability. The good Li-ion storage performance demonstrates the great potential of this unique V2O5 hollow material as a high-performance cathode for lithium-ion batteries.
Michael J Welsh - One of the best experts on this subject based on the ideXlab platform.
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basolateral chloride current in human airway epithelia
2007Co-Authors: Omar A Itani, Fred S Lamb, James E Melvin, Michael J WelshAbstract:Electrolyte Transport by airway epithelia regulates the quantity and composition of liquid covering the airways. Previous data indicate that airway epithelia can absorb NaCl. At the apical membrane...
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correction of camp stimulated fluid secretion in cystic fibrosis airway epithelia efficiency of adenovirus mediated gene transfer in vitro
1994Co-Authors: Joseph Zabner, Larry A Couture, Alan E Smith, Michael J WelshAbstract:ABSTRACT Adenovirus vectors are a promising vehicle to deliver cystic fibrosis transmembrane conductance regulator (CFTR) cDNA to airway epithelia. However, the value of adenovirus vectors will depend on the efficiency with which the vector can correct the defective fluid Transport that is thought to underlie the pathogenesis of the disease. To address the efficiency of gene transfer, we applied adenovirus vectors expressing CFTR (Ad2/ CFTR-1) or β-galactosidase to the mucosal surface of primary cultures of airway epithelial cells grown as polarized epithelial monolayers on permeable filter supports. These conditions provide a model that reproduces the physiology of the airways in vivo. We found that after adding 1 moi Ad2/CFTR-1 to the mucosal surface, cAMP agonists stimulated fluid secretion that was within the range observed in epithelia from normal subjects. When we measured Electrolyte Transport, we found that as little as 0.1 moi partially restored cAMP-stimulated Cl– secretion, and at 10 moi Cl– se...
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chloride channels in the apical membrane of normal and cystic fibrosis airway and intestinal epithelia
1992Co-Authors: Matthew P Anderson, David N Sheppard, Herbert A Berger, Michael J WelshAbstract:Cl- channels located in the apical membrane of secretory epithelia play a key role in epithelial fluid and Electrolyte Transport. Dysfunction of one of these channels, cystic fibrosis transmembrane conductance regulator (CFTR), causes the genetic disease cystic fibrosis (CF). We review here the properties and regulation of the different types of Cl- channels that have been reported in airway and intestinal epithelia. We begin by describing the properties of the CFTR Cl- channel and then use those properties as a point of reference. We focused particularly on the evidence that localizes specific types of Cl- channel to the apical membrane. With that background, we assess the biological function of various Cl- channels in airway and intestinal epithelia.
Stefano Passerini - One of the best experts on this subject based on the ideXlab platform.
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insights into the structure and Transport of the lithium sodium magnesium and zinc bis trifluoromethansulfonyl imide salts in ionic liquids
2018Co-Authors: Oleg Borodin, Guinevere A. Giffin, Arianna Moretti, Justin B. Haskins, John W. Lawson, Wesley Henderson, Stefano PasseriniAbstract:Details of the lithium (Li+), sodium (Na+), magnesium (Mg2+), and zinc (Zn2+) cation coordination and Electrolyte Transport properties are examined using molecular dynamics (MD) simulations for the N-butyl-N-methylpyrrolidinium bis(trifluoromethansulfonyl)imide (pyr14TFSI) ionic liquid (IL) doped with LiTFSI, NaTFSI, Mg(TFSI)2, and Zn(TFSI)2 salts. MD simulations are performed as a function of temperature using a polarizable force field (APPLE&P) that yields the Li+, Na+, Mg2+, and Zn2+ cation binding energies to the TFSI– anions in excellent agreement with quantum chemistry results. At 333 K, 4.7–4.8 TFSI– oxygen atoms from approximately three TFSI– anions coordinate Li+ and Na+, while Zn2+ and Mg2+ cations are instead coordinated by approximately six TFSI– oxygen atoms. Significant Na+ coordination with the fluorine atoms of the TFSI– anions is observed, unlike for Li+, Mg2+ and Zn2+. The cation–TFSI– binding motifs and the propensity of the salts to form large aggregates are temperature dependent with ...
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Insights into the Structure and Transport of the Lithium, Sodium, Magnesium, and Zinc Bis(trifluoromethansulfonyl)imide Salts in Ionic Liquids
2018Co-Authors: Oleg Borodin, Guinevere A. Giffin, Arianna Moretti, Justin B. Haskins, John W. Lawson, Wesley A. Henderson, Stefano PasseriniAbstract:Details of the lithium (Li+), sodium (Na+), magnesium (Mg2+), and zinc (Zn2+) cation coordination and Electrolyte Transport properties are examined using molecular dynamics (MD) simulations for the N-butyl-N-methylpyrrolidinium bis(trifluoromethansulfonyl)imide (pyr14TFSI) ionic liquid (IL) doped with LiTFSI, NaTFSI, Mg(TFSI)2, and Zn(TFSI)2 salts. MD simulations are performed as a function of temperature using a polarizable force field (APPLE&P) that yields the Li+, Na+, Mg2+, and Zn2+ cation binding energies to the TFSI– anions in excellent agreement with quantum chemistry results. At 333 K, 4.7–4.8 TFSI– oxygen atoms from approximately three TFSI– anions coordinate Li+ and Na+, while Zn2+ and Mg2+ cations are instead coordinated by approximately six TFSI– oxygen atoms. Significant Na+ coordination with the fluorine atoms of the TFSI– anions is observed, unlike for Li+, Mg2+ and Zn2+. The cation–TFSI– binding motifs and the propensity of the salts to form large aggregates are temperature dependent with opposite trends noted for the Electrolytes containing the Li and Na salts vs Mg salts. The MD simulations accurately predicted Electrolyte Transport properties including ionic conductivity, viscosity, and self-diffusion coefficients. A connection between the metal cation coordination, Transport properties, and Transport mechanisms is established for the different cations. The much longer cation–anion residence times for the divalent Zn2+- and Mg2+-containing Electrolytes, as compared to those with monovalent Na+ and Li+, indicate the significantly slower desolvation kinetics of the divalent salts and the dominance of the vehicular cation Transport mechanism relative to the anion exchange mechanism
Oleg Borodin - One of the best experts on this subject based on the ideXlab platform.
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insights into the structure and Transport of the lithium sodium magnesium and zinc bis trifluoromethansulfonyl imide salts in ionic liquids
2018Co-Authors: Oleg Borodin, Guinevere A. Giffin, Arianna Moretti, Justin B. Haskins, John W. Lawson, Wesley Henderson, Stefano PasseriniAbstract:Details of the lithium (Li+), sodium (Na+), magnesium (Mg2+), and zinc (Zn2+) cation coordination and Electrolyte Transport properties are examined using molecular dynamics (MD) simulations for the N-butyl-N-methylpyrrolidinium bis(trifluoromethansulfonyl)imide (pyr14TFSI) ionic liquid (IL) doped with LiTFSI, NaTFSI, Mg(TFSI)2, and Zn(TFSI)2 salts. MD simulations are performed as a function of temperature using a polarizable force field (APPLE&P) that yields the Li+, Na+, Mg2+, and Zn2+ cation binding energies to the TFSI– anions in excellent agreement with quantum chemistry results. At 333 K, 4.7–4.8 TFSI– oxygen atoms from approximately three TFSI– anions coordinate Li+ and Na+, while Zn2+ and Mg2+ cations are instead coordinated by approximately six TFSI– oxygen atoms. Significant Na+ coordination with the fluorine atoms of the TFSI– anions is observed, unlike for Li+, Mg2+ and Zn2+. The cation–TFSI– binding motifs and the propensity of the salts to form large aggregates are temperature dependent with ...
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Insights into the Structure and Transport of the Lithium, Sodium, Magnesium, and Zinc Bis(trifluoromethansulfonyl)imide Salts in Ionic Liquids
2018Co-Authors: Oleg Borodin, Guinevere A. Giffin, Arianna Moretti, Justin B. Haskins, John W. Lawson, Wesley A. Henderson, Stefano PasseriniAbstract:Details of the lithium (Li+), sodium (Na+), magnesium (Mg2+), and zinc (Zn2+) cation coordination and Electrolyte Transport properties are examined using molecular dynamics (MD) simulations for the N-butyl-N-methylpyrrolidinium bis(trifluoromethansulfonyl)imide (pyr14TFSI) ionic liquid (IL) doped with LiTFSI, NaTFSI, Mg(TFSI)2, and Zn(TFSI)2 salts. MD simulations are performed as a function of temperature using a polarizable force field (APPLE&P) that yields the Li+, Na+, Mg2+, and Zn2+ cation binding energies to the TFSI– anions in excellent agreement with quantum chemistry results. At 333 K, 4.7–4.8 TFSI– oxygen atoms from approximately three TFSI– anions coordinate Li+ and Na+, while Zn2+ and Mg2+ cations are instead coordinated by approximately six TFSI– oxygen atoms. Significant Na+ coordination with the fluorine atoms of the TFSI– anions is observed, unlike for Li+, Mg2+ and Zn2+. The cation–TFSI– binding motifs and the propensity of the salts to form large aggregates are temperature dependent with opposite trends noted for the Electrolytes containing the Li and Na salts vs Mg salts. The MD simulations accurately predicted Electrolyte Transport properties including ionic conductivity, viscosity, and self-diffusion coefficients. A connection between the metal cation coordination, Transport properties, and Transport mechanisms is established for the different cations. The much longer cation–anion residence times for the divalent Zn2+- and Mg2+-containing Electrolytes, as compared to those with monovalent Na+ and Li+, indicate the significantly slower desolvation kinetics of the divalent salts and the dominance of the vehicular cation Transport mechanism relative to the anion exchange mechanism
Andrew M Colclasure - One of the best experts on this subject based on the ideXlab platform.
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electrode scale and Electrolyte Transport effects on extreme fast charging of lithium ion cells
2020Co-Authors: Andrew M Colclasure, Tanvir R Tanim, Andrew N Jansen, Stephen E Trask, Alison R Dunlop, Bryant J Polzin, Ira Bloom, Dave Robertson, Leroy Flores, Michael EvansAbstract:Abstract A combination of cell testing and electrochemical-thermal modeling is used to investigate extreme fast charging (XFC) performance for cells with a low loading of 1.5 mAh.cm-2 and moderate loading of 2.5 mAh.cm-2. Cells with a low loading of 1.5 mAh.cm-2 withstand XFC performance remarkably well even up to 9C constant current (CC) charging with high charge capacity, high coulombic efficiency and very little apparent lithium plating. For a moderate loading of 2.5 mAh.cm-2, the 6C CC charge capacity is poor with significant amounts of visually observed lithium plating. Simulated Electrolyte Transport properties are revealed to be insufficient and set majorly limitation for XFC performance in case of the moderate and the only simulated higher loadings (>2.5 mAh.cm-2). Charging at elevated temperature is shown to be an effective strategy for moderate loading cells enabling good 10-minute charge capacity, high coulombic efficiency, and mitigating lithium plating. Lastly, an electrochemical model is used to investigate strategies for enabling 4-6C CC charging for cells incorporating loading beyond 3 mAh.cm-2. As a result, the combination of an increased cell temperature, reduced electrode tortuosity, and enhanced ion-Transport in the Electrolyte are most likely required to facilitate XFC for state of the art and future high energy lithium-ion batteries.
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electrode scale and Electrolyte Transport effects on extreme fast charging of lithium ion cells
2020Co-Authors: Andrew M Colclasure, Tanvir R Tanim, Andrew N Jansen, Stephen E Trask, Alison R Dunlop, Bryant J Polzin, Ira Bloom, Dave Robertson, Leroy Flores, Michael C EvansAbstract:Abstract A combination of cell testing and electrochemical-thermal modeling is used to investigate extreme fast charging (XFC) performance for cells with a low loading of 1.5 mAh.cm−2 and moderate loading of 2.5 mAh.cm−2. Cells with a low loading of 1.5 mAh.cm−2 withstand XFC performance remarkably well even up to 9C constant current (CC) charging with high charge capacity, high coulombic efficiency and very little apparent lithium plating. For a moderate loading of 2.5 mAh.cm−2, the 6C CC charge capacity is poor with significant amounts of visually observed lithium plating. Simulated Electrolyte Transport properties are revealed to be insufficient and majorly set limitations for XFC performance in case of the moderate and the only simulated higher loadings (>2.5 mAh.cm-2). Charging at elevated temperature is shown to be an effective strategy for moderate loading cells enabling good 10-min charge capacity, high coulombic efficiency, and mitigating lithium plating. Lastly, an electrochemical model is used to investigate strategies for enabling 4–6C CC charging for cells incorporating loading beyond 3 mAh.cm−2. As a result, the combination of an increased cell temperature, reduced electrode tortuosity, and enhanced ion-Transport in the Electrolyte are most likely required to facilitate XFC for state of the art and future high energy lithium-ion batteries.