scholarly journals Effects of carbon surface topography on the electrode/electrolyte interface structure and relevance to Li–air batteries

2016 ◽  
Vol 18 (44) ◽  
pp. 30830-30836 ◽  
Author(s):  
S. V. Pavlov ◽  
S. A. Kislenko
Keyword(s):  
Surface Topography ◽  
Concentration Distribution ◽  
Interface Structure ◽  
Carbon Surface ◽  
Absorption Kinetics ◽  
Solvent Structure ◽  
Electrolyte Interface ◽  
Interface Concentration

Carbon surface topography influences the solvent structure at the interface, concentration distribution of reactants (Li+, O2), and their absorption kinetics.

Formation of a stable carbon framework in a MnO yolk–shell sphere to achieve exceptional performance for a Li-ion battery anode

2015 ◽  
Vol 3 (30) ◽  
pp. 15591-15597 ◽  
Author(s):  
Shengbin Wang ◽  
Changlei Xiao ◽  
Yalan Xing ◽  
Huaizhe Xu ◽  
Shichao Zhang
Keyword(s):  
Reaction Kinetics ◽  
Shell Structure ◽  
Carbon Surface ◽  
Li Ion Battery ◽  
Stable Carbon ◽  
Electrolyte Interface ◽  
Carbon Framework ◽  
Li Ion ◽  
Battery Anode

A 3D carbon framework has been introduced into a MnO yolk–shell structure, which improves the reaction kinetics, prevents MnO from fracturing and agglomerating, and limits most SEI formation to the carbon surface instead of on the MnO–electrolyte interface.

scholarly journals Coupling Molecular Dynamics and Micromechanics for the Assessment of Friction and Damage Accumulation in Diamond-Like Carbon Thin Films Under Lubricated Sliding Contacts

Lubricants ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 30
Author(s):  
Timo J. Hakala ◽  
Kenneth Holmberg ◽  
Anssi Laukkanen
Keyword(s):  
Thin Films ◽  
Surface Topography ◽  
Multiscale Modeling ◽  
Atomic Scale ◽  
Carbon Surface ◽  
Diamond Like Carbon ◽  
Lubricated Contacts ◽  
Dlc Coating ◽  
Scale Modeling ◽  
Wear Response

Diamond-like carbon (DLC) coatings have proven to be an excellent thin film solution for reducing friction of tribological systems as well as providing resistance to wear. These characteristics yield greater efficiency and longer lifetimes of tribological contacts with respect to surface solutions targeting for example automotive applications. However, the route from discovery to deployment of DLC films has taken its time and still the design of these solutions is largely done on a trial-and-error basis. This results in challenges both in designing and optimizing DLC films for specific applications and limits the understanding, and subsequently exploitation, of many of the underlying physical mechanisms responsible for its favorable frictional response and high resistance to various types of wear. In current work multiscale modeling is utilized to study the friction and wear response of DLC thin films in dry and lubricated contacts. Atomic scale mechanisms responsible for friction due to interactions between the sliding surfaces and shearing of the amorphous carbon surface are utilized to establish frictional response for microstructure scale modeling of DLC to DLC surface contacts under dry and graphene lubricated conditions. Then at the coarser microstructural scale both structure of the multilayer, substrate and surface topography of the DLC coating are incorporated in studying of the behavior of the tribosystem. A fracture model is included to evaluate the nucleation and growth of wear damage leading either to loss of adhesion or failure of one of the film constituents. The results demonstrate the dependency of atomistic scale friction on film characteristics, particularly hybridization of bonding and tribochemistry. The microstructure scale modeling signifies the behavior of the film as a tribosystem, the various material properties and the surface topography interact to produce the explicitly modeled failure response. Ultimately, the work contributes towards establishing multiscale modeling capabilities to better understand and design novel DLC material solutions for various tribological applications.

Process Dependent Morphology of the Si/SiO2 Interface Measured with Scanning Tunneling Microscopy

1987 ◽  
Vol 105 ◽  
Author(s):  
Michael H. Hecht ◽  
L. D. Bell ◽  
F. J. Grunthaner ◽  
W. J. Kaiser
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Surface Topography ◽  
Experimental Technique ◽  
Interface Structure ◽  
Scanning Tunneling ◽  
Electrical Characteristics ◽  
Interface Morphology ◽  
Tunneling Microscopy ◽  
Different Temperatures

AbstractA new experimental technique to determine Si/SiO2 interface morphology is described. Thermal oxides of silicon are chemically removed, and the resulting surface topography is measured with scanning tunneling microscopy. Interfaces prepared by oxidation of Si (100) and (111) surfaces, followed by post oxidation anneal (POA) at different temperatures, have been characterized. Correlations between interface structure, chemistry, and electrical characteristics are described.

Effect of the electrode/electrolyte interface structure on the potassium-ion diffusional and charge transfer rates: towards a high voltage potassium-ion battery

2017 ◽  
Vol 258 ◽  
pp. 814-824 ◽  
Author(s):  
Victoria A. Nikitina ◽  
Sergei M. Kuzovchikov ◽  
Stanislav S. Fedotov ◽  
Nellie R. Khasanova ◽  
Artem M. Abakumov ◽  
...  
Keyword(s):  
Charge Transfer ◽  
High Voltage ◽  
Interface Structure ◽  
Potassium Ion ◽  
Transfer Rates ◽  
Electrolyte Interface

Bromomethylation of high-surface area carbons as a versatile synthon: adjusting the electrode–electrolyte interface in lithium–sulfur batteries

2019 ◽  
Vol 7 (34) ◽  
pp. 20013-20025 ◽  
Author(s):  
Samuel J. Fretz ◽  
Christopher T. Lyons ◽  
Ella Levin ◽  
Christopher E. D. Chidsey ◽  
Anders E. C. Palmqvist ◽  
...  
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Carbon Surface ◽  
Synthetic Method ◽  
Surface Groups ◽  
Novel Materials ◽  
Electrolyte Interface ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

Bromomethylation is a mild and convenient synthetic method to modify a carbon surface that can be subsequently derivatized to form a variety of surface groups. Diamine modification yields novel materials that improve the performance of Li–S cathodes.

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