Browsing Advanced Materials for Micro- and Nano-Systems (AMMNS) by Author "Ceder, Gerbrand"
Now showing items 1-14 of 14
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Amorphous Al-transition Metal Alloys as Anode Material for Lithium Ion Battery
(2006-01)Al based alloy powders (Al₈₅Ni₅Y₆Co₂Fe₂) are produced by spray atomization method. High energy ball milling is done to modify the surface topology and particle size for better electrochemical performance. X ray diffraction ... -
Amorphous Metallic Glass as New High Power and Energy Density Anodes For Lithium Ion Rechargeable Batteries
(2002-01)We have investigated the use of aluminum based amorphous metallic glass as the anode in lithium ion rechargeable batteries. Amorphous metallic glasses have no long-range ordered microstructure; the atoms are less closely ... -
Characterization of LiNi₀.₅Mn₁.₅O₄ Thin Film Cathode Prepared by Pulsed Laser Deposition
(2006-01)LiNi₀.₅Mn₁.₅O₄ thin films have been grown by pulsed laser deposition (PLD) on stainless steel (SS) substrates. The crystallinity and structure of thin films were investigated by X-ray diffraction (XRD). Microstructure and ... -
Electrochemical Behavior and Li Diffusion Study of LiCoO₂ Thin Film Electrodes Prepared by PLD
(2007-01)Preferred c-axis oriented LiCoO₂ thin films were prepared on the SiO₂/Si (SOS) substrates by pulsed laser deposition (PLD). Thin film electrodes without carbon and binder are ideal samples to study the electrochemical ... -
First Principles Modeling for Research and Design of New Materials
(2003-01)First principles computation can be used to investigate an design materials in ways that can not be achieved with experimental means. We show how computations can be used to rapidly capture the essential physics that ... -
First-Principles Study of Point Defects in LaAlO₃
(2007-01)In this study, the native point defects including oxygen vacancy and interstitial, metal (La, Al) vacancy and interstitial, and metal antisite in perovskite LAO are studied. Defect formation energies are studied as a ... -
Growth and Characterization of LiCoO₂ Thin Films for Microbatteries
(2005-01)LiCoO₂thin films have been grown by pulsed laser deposition on stainless steel and SiO₂/Si substrates. The film deposited at 600°C in an oxygen partial pressure of 100mTorr shows an excellent crystallinity, stoichiometry ... -
Investigation on Aluminum-Based Amorphous Metallic Glass as New Anode Material in Lithium Ion Batteries
(2003-01)Aluminum based amorphous metallic glass powders were produced and tested as the anode materials for the lithium ion rechargeable batteries. Ground Al₈₀Ni₁₀La₁₀ was found to have a ... -
Investigation on Thin Film Lithium Microbatteries
(2004-01)Thin film lithium microbatteries were investigated in this project in which LiCoO₂ cathodes about 200 to 500 nm were fabricated by pulsed-laser deposition (PLD) at different processing parameters such as laser energy ... -
Metastable Intermediate in LixMnO₂ Layered to Spinel Phase Transition
(2002-01)Ab Initio calculations suggest that partially lithiated layered LixMnO₂ transforms to spinel in a two-stage process. In the first stage, a significant fraction of the Mn and Li ions rapidly occupy tetrahedral sites, forming ... -
Native Point Defects in yttria as a High-Dielectric-Constant Gate Oxide Material: A First-Principles Study
(2006-01)Yttria (Y₂O₃) has become a promising gate oxide material to replace silicon dioxide in metal-oxide-semiconductor (MOS) devices. The characterization of native point defect in Y₂O₃ is essential to understand the behavior ... -
Solid State Thin Film Lithium Microbatteries
(2003-01)Solid state thin film lithium microbatteries fabricated by pulsed-laser deposition (PLD) are suggested. During deposition the following process parameters must be considered, which are laser energy and fluence, laser pulse ... -
Synthesis, electrochemistry and First Principles Calculation studies of layered Li-Ni-Ti-O compounds
(2004-01)New layered cathode materials, Li₀.₉Ni₀.₄₅Ti₀.₅₅O₂, were synthesized by means of ion-exchange from Na₀.₉Ni₀.₄₅Ti₀.₅₅O₂. The degree of cation disordering in the material depends critically on the synthesis conditions. Longer ... -
Vibrational thermodynamics: coupling of chemical order and size effects
(2002-01)We study the effects of vibrations in the Pd₃ system using first-principles pseudopotential calculations. We find that upon disordering from the DO₂₂ phase, the decreases by 0.07kB. We explain our results in terms of atomic ...
