Javier Bareño
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View article: Enable High-Energy LiNi0.5Co0.2Mn0.3O2 by Ultra-Thin Coating through Wet Impregnation
Enable High-Energy LiNi0.5Co0.2Mn0.3O2 by Ultra-Thin Coating through Wet Impregnation Open
A high cut-off voltage is required for nickel-rich layered oxide LiNixCoyMnzO2 (NCM) to meet the high energy density requirement of lithium-ion batteries in electric vehicles. However, such a high voltage application leads to an unstable i…
View article: Strain-driven surface reconstruction and cation segregation in layered Li(Ni<sub>1−x−y</sub>Mn<sub>x</sub>Co<sub>y</sub>)O<sub>2</sub> (NMC) cathode materials
Strain-driven surface reconstruction and cation segregation in layered Li(Ni<sub>1−x−y</sub>Mn<sub>x</sub>Co<sub>y</sub>)O<sub>2</sub> (NMC) cathode materials Open
Novel mechanism for surface-reconstruction stabilization on layered cathode oxides.
View article: Meso to Atomic Scale Microstructural Changes During Ageing of NCM Li-ion Battery Materials
Meso to Atomic Scale Microstructural Changes During Ageing of NCM Li-ion Battery Materials Open
Journal Article Meso to Atomic Scale Microstructural Changes During Ageing of NCM Li-ion Battery Materials Get access Jacob R Jokisaari, Jacob R Jokisaari University of Illinois at Chicago, Department of Physics, Chicago, IL, USA Correspon…
View article: On Disrupting the Na<sup>+</sup>-Ion/Vacancy Ordering in P2-Type Sodium–Manganese–Nickel Oxide Cathodes for Na<sup>+</sup>-Ion Batteries
On Disrupting the Na<sup>+</sup>-Ion/Vacancy Ordering in P2-Type Sodium–Manganese–Nickel Oxide Cathodes for Na<sup>+</sup>-Ion Batteries Open
An investigation of the electrochemical and structural properties of layered P2-Na0.62Mn0.75Ni0.25O2 is presented. The effect of changing the Mn:Ni ratio (3:1) from what is found in Na0.67Mn0.67Ni0.33O2 (2:1) and consequently the introduct…
View article: Investigations of Si Thin Films as Anode of Lithium-Ion Batteries
Investigations of Si Thin Films as Anode of Lithium-Ion Batteries Open
Amorphous silicon thin films having various thicknesses were investigated as a negative electrode material for lithium-ion batteries. Electrochemical characterization of the 20 nm thick thin silicon film revealed a very low first cycle Cou…
View article: Methodology for understanding interactions between electrolyte additives and cathodes: a case of the tris(2,2,2-trifluoroethyl)phosphite additive
Methodology for understanding interactions between electrolyte additives and cathodes: a case of the tris(2,2,2-trifluoroethyl)phosphite additive Open
Both experiments and theory show that TTFP does not passivate NMC532 cathode surface towards electrolyte oxidation.
View article: Auger Electrons as Probes for Composite Micro- and Nanostructured Materials: Application to Solid Electrolyte Interphases in Graphite and Silicon-Graphite Electrodes
Auger Electrons as Probes for Composite Micro- and Nanostructured Materials: Application to Solid Electrolyte Interphases in Graphite and Silicon-Graphite Electrodes Open
In this study, Auger electron spectroscopy (AES) combined with ion sputtering profilometry, Xray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) have been used in a complementary fashion to examine chemical and mic…
View article: Capacity Fade and Its Mitigation in Li-Ion Cells with Silicon-Graphite Electrodes
Capacity Fade and Its Mitigation in Li-Ion Cells with Silicon-Graphite Electrodes Open
Silicon-graphite (Si-Gr) electrodes typically contain lithiated carboxylates as polymer binders that are introduced through aqueous processing. Li-ion cells with such electrodes show significantly faster capacity fade than cells with graph…
View article: Surface Structure, Morphology, and Stability of Li(Ni<sub>1/3</sub>Mn<sub>1/3</sub>Co<sub>1/3</sub>)O<sub>2</sub> Cathode Material
Surface Structure, Morphology, and Stability of Li(Ni<sub>1/3</sub>Mn<sub>1/3</sub>Co<sub>1/3</sub>)O<sub>2</sub> Cathode Material Open
Layered Li(Ni1-x-yMnxCoy)O2 (NMC) oxides are promising cathode materials capable of addressing some of the challenges associated with next-generation energy storage devices. In particular, improved energy densities, longer cycle-life, and …
View article: Chemical Weathering of Layered Ni-Rich Oxide Electrode Materials: Evidence for Cation Exchange
Chemical Weathering of Layered Ni-Rich Oxide Electrode Materials: Evidence for Cation Exchange Open
Lithiated ternary oxides containing nickel, cobalt, and manganese are intercalation compounds that are used as positive electrodes in high-energy lithium-ion batteries. These materials undergo compositional changes that adversely affect th…
View article: Tris(trimethylsilyl) Phosphite (TMSPi) and Triethyl Phosphite (TEPi) as Electrolyte Additives for Lithium Ion Batteries: Mechanistic Insights into Differences during LiNi<sub>0.5</sub>Mn<sub>0.3</sub>Co<sub>0.2</sub>O<sub>2</sub>-Graphite Full Cell Cycling
Tris(trimethylsilyl) Phosphite (TMSPi) and Triethyl Phosphite (TEPi) as Electrolyte Additives for Lithium Ion Batteries: Mechanistic Insights into Differences during LiNi<sub>0.5</sub>Mn<sub>0.3</sub>Co<sub>0.2</sub>O<sub>2</sub>-Graphite Full Cell Cycling Open
Here, tris(trimethylsilyl) phosphite (TMSPi) has emerged as an useful electrolyte additive for lithium ion cells. This work examines the use of TMSPi and a structurally analogous compound, triethyl phosphite (TEPi), in LiNi0.5Mn0.3Co0.2O2-…
View article: Cycling Behavior of NCM523/Graphite Lithium-Ion Cells in the 3–4.4 V Range: Diagnostic Studies of Full Cells and Harvested Electrodes
Cycling Behavior of NCM523/Graphite Lithium-Ion Cells in the 3–4.4 V Range: Diagnostic Studies of Full Cells and Harvested Electrodes Open
Energy density of full cells containing layered-oxide positive electrodes can be increased by raising the upper cutoff voltage above the current 4.2 V limit. In this article we examine aging behavior of cells, containing LiNi0.5Co0.2Mn0.3O…
View article: Microstructural Evolution in Transition-metal-oxide Cathode Materials for Lithium-Ion Batteries
Microstructural Evolution in Transition-metal-oxide Cathode Materials for Lithium-Ion Batteries Open
Journal Article Microstructural Evolution in Transition-metal-oxide Cathode Materials for Lithium-Ion Batteries Get access Dean J Miller, Dean J Miller Electron Microscopy Center - Center for Nanoscale Materials, Argonne National Laborator…
View article: The Effect of Pre-Analysis Washing on the Surface Film of Graphite Electrodes
The Effect of Pre-Analysis Washing on the Surface Film of Graphite Electrodes Open
Electrodes are routinely washed to remove electrolyte deposits, salt, and high boiling point solvents prior to analysis with surface-sensitive techniques. The effect of washing on the surface films of graphite electrodes from LiCoO2/graphi…
View article: Experimental and theoretical investigations of functionalized boron nitride as electrode materials for Li-ion batteries
Experimental and theoretical investigations of functionalized boron nitride as electrode materials for Li-ion batteries Open
The feasibility of synthesizing functionalized h-BN (FBN)viathe reaction between molten LiOH and solid h-BN is studied for the first time and its first ever application as an electrode material in Li-ion batteries is evaluated.
View article: Enabling High-Energy, High-Voltage Lithium-Ion Cells: Standardization of Coin-Cell Assembly, Electrochemical Testing, and Evaluation of Full Cells
Enabling High-Energy, High-Voltage Lithium-Ion Cells: Standardization of Coin-Cell Assembly, Electrochemical Testing, and Evaluation of Full Cells Open
Coin-cells are often the test format of choice for laboratories engaged in battery research and development as they provide a convenient platform for rapid testing of new materials on a small scale. However, reliable, reproducible data via…
View article: On the Localized Nature of the Structural Transformations of Li<sub>2</sub>MnO<sub>3</sub> Following Electrochemical Cycling
On the Localized Nature of the Structural Transformations of Li<sub>2</sub>MnO<sub>3</sub> Following Electrochemical Cycling Open
Although the Li‐excess layered‐oxide Li 2 MnO 3 has a high theoretical capacity, structural transformations within the oxide during electrochemical cycling lead to relatively low experimental capacities, hindering its use in practical appl…