Showing papers by "Xingcheng Xiao published in 2019"

Mechanical behavior of electroplated mossy lithium at room temperature studied by flat punch indentation

Abstract: We report the Young's modulus and deformation behavior of electroplated mossy lithium at room temperature investigated by flat punch indentation inside an argon-filled glovebox. The Young's modulus of the mossy lithium with a porosity of about 62.3% is measured to be about 2 GPa, which is smaller than that (∼7.8 GPa) of bulk lithium. Both the mossy and bulk lithium show clearly an indentation creep behavior. Despite its highly porous microstructure, the impression creep velocity of the mossy lithium is less than one-thirtieth of that of bulk lithium under the same stress. We proposed possible mechanisms for the significantly higher deformation and creep resistance of the mossy lithium over bulk lithium. These findings are key to developing mechanical suppression approaches to improve the cycling stability of lithium metal electrodes.

Reinforced Composite Film on Lithium Metal Electrodes through Aryl Chlorosilane Treatment

Abstract: Lithium metal has great potential to become the anode for the next generation of high-energy-density batteries because of high capacity (3860 mAh g–1), lowest negative electrochemical potential, and low density. Low cycle efficiency and dendrite growth are two critical barriers for rechargeable batteries using Li metal as the anode, mainly due to the coupled mechanical/chemical degradation of the solid electrolyte interphase (SEI) layer formed on the Li metal surface. In this work, we found that a composite film of lithium aryl silanolate with uniformly distributed submicron LiCl-dominant particles can in situ form on the Li metal surface by treating Li with a single phenyl substituted chlorosilane. The synergistic effect of the high modulus of the composite film resulted from both well-dispersed LiCl particles and phenyl ring structures, and the extra reinforcement by the π–π interaction of aryl silanolate molecules that coated on LiCl particles and Li electrode surface endows the artificial surface coat...

Tuning Solid Electrolyte Interphase Layer Properties through the Integration of Conversion Reaction.

Abstract: The solid electrolyte interphase (SEI) layer plays an important role in altering the ion transport and modifying the structural evolution of the Li metal anode during repeated cycling. While the fu...

Separators for lithium-containing electrochemical cells and methods of making the same

Abstract: A porous separator for a lithium-containing electrochemical cell is provided herein. The porous separator includes a porous substrate and an active layer comprising lithium ion-exchanged zeolite particles. Methods of manufacturing the porous separator and lithium-containing electrochemical cells including the porous separator are also provided herein.

Separatoren für lithiumhaltige elektrochemische Zellen und Verfahren zur Herstellung derselben

Abstract: Ein poroser Separator fur eine lithiumhaltige elektrochemische Zelle ist hierin vorgesehen. Der porose Separator beinhaltet ein poroses Substrat und eine aktive Schicht, die Lithiumionen-ausgetauschte Zeolithpartikel umfasst. Verfahren zur Herstellung des porosen Separators und lithiumhaltige elektrochemische Zellen einschlieslich des porosen Separators sind ebenfalls hierin vorgesehen.

Electrically conductive copper components and joining processes therefor

Abstract: Methods of manufacturing electrically conductive copper components for electric devices and method of joining electrically conductive copper components are provided. Each of the electrically conductive copper components are manufactured to include a preexisting coating of joining material located on or adjacent to a joining surface thereof.

Verfahren zur anwendung selbstformender künstlicher festelektrolytschnittstellenschicht (sei-schicht) zur stabilisierung der zyklusstabilität von elektroden in lithiumbatterien

Abstract: Ein Verfahren zur Herstellung einer negativen Elektrode fur eine elektrochemische Zelle beinhaltet das Aufbringen eines Fluorpolymers uber ein Abscheidungsverfahren auf einen oder mehrere Oberflachenbereiche eines elektroaktiven Materials. Das elektroaktive Material kann ausgewahlt werden aus der Gruppe bestehend aus: Lithiummetall, Siliziummetall, siliziumhaltigen Legierungen und Kombinationen davon. Das Fluorpolymer reagiert mit Lithium zur Bildung einer Verbundoberflachenschicht auf dem einen oder den mehreren Oberflachenbereichen, die ein organisches Matrixmaterial mit darin verteilten Lithiumfluoridpartikeln umfassen. Elektrochemische Zellen, die eine solche negative Elektrode enthalten, werden ebenfalls bereitgestellt.

Rechargeable lithium-ion battery chemistry with fast charge capability and high energy density

Abstract: A rechargeable lithium-ion battery disclosed herein comprises a positive electrode with a positive electroactive material that in a charged state comprises lithium iron (II) orthosilicate (Li 2 FeSiO 4 ) and in a discharged state comprises FeSiO 4 or LiFeSiO 4 . A negative electrode comprises phosphorene. A separator is disposed between the positive electrode and the negative electrode. An electrolyte has an organic solvent especially containing ether-based organic solvents and a lithium salt that provides a conductive medium for lithium ions to transfer between the positive electrode and the negative electrode. Such a rechargeable lithium-ion battery provides advantageous power delivery, long driving ranges, and fast charge to enhance widespread use of batteries, especially in vehicles. Furthermore, lithium plating can be minimized or avoided, even at low temperature charging. Methods of recharging a rechargeable lithium-ion battery at low temperatures are also disclosed.

Bi-metallic oxidation catalyst materials and appurtenant devices and systems

Abstract: Bimetallic oxidation catalyst devices include a support body, one or more metal A bulk deposits disposed on the support body, and a plurality of metal B atomic clusters disposed on the surface of each of the metal A bulk deposits. Metal A and metal B are different metals each selected from the group consisting of platinum group metals (PGM), Ag, Au, Ni, Co, and Cu, and substantially no metal B is deposited on the support body. At least 85% by weight of the metal B atomic clusters comprise up to 10 atoms and the maximum metal B atomic cluster size is 200 metal B atoms. The combined loading of metal A and metal B can be less than 1.5% by weight relative to the weight of the support body. Metal A can include Pd, Rh, Rh, or Pd, and metal B can include Pt, Pt, Ag, or Ag.

Induction heating-assisted catalysts

Abstract: A component of an exhaust system is provided. The component includes a housing extending from an inlet at a first end to an outlet at an opposing second end, an electrically conductive material disposed within the housing, and an induction coil configured to emit a magnetic field. The magnetic field is operable to heat the electrically conductive material from a first temperature of greater than or equal to about −20° C. to less than or equal to about 50° C. to a second temperature of greater than or equal to about 200° C. to less than or equal to about 700° C. in a time period of less than or equal to about 20 seconds.

Laser-induced micro-anchor structural and passivation layer for metal-polymeric composite joining and methods for manufacturing thereof

Abstract: The present disclosure provides a metal-polymeric composite joint including a first component and a second component. The first component includes a metal. The first component has a first surface including a plurality of micro-anchors. The second component includes a composite material including a polymer and a reinforcing fiber. The second component has a second surface that at least partially engages the first surface of the first component. A portion of the polymer of the second component occupies at least a portion of the micro-anchors of the first component to fix the second component to the first component. In one aspect, the metal-polymeric composite joint further includes a passivation layer disposed between the first surface of the first component and the second surface of the second component.