A. J. Louli
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View article: Different Positive Electrodes for Anode-Free Lithium Metal Cells
Different Positive Electrodes for Anode-Free Lithium Metal Cells Open
With a potential to deliver 60% greater energy density than conventional lithium-ion batteries, the simple design of anode-free lithium metal cells with liquid electrolytes has generated significant research interest. However, without exce…
View article: How do Depth of Discharge, C-rate and Calendar Age Affect Capacity Retention, Impedance Growth, the Electrodes, and the Electrolyte in Li-Ion Cells?
How do Depth of Discharge, C-rate and Calendar Age Affect Capacity Retention, Impedance Growth, the Electrodes, and the Electrolyte in Li-Ion Cells? Open
Lithium-ion cells testing under different state of charge ranges, C-rates and cycling temperature have different degrees of lithium inventory loss, impedance growth and active mass loss. Here, a large matrix of polycrystalline NMC622/natur…
View article: Impact of Graphite Materials on the Lifetime of NMC811/Graphite Pouch Cells: Part II. Long-Term Cycling, Stack Pressure Growth, Isothermal Microcalorimetry, and Lifetime Projection
Impact of Graphite Materials on the Lifetime of NMC811/Graphite Pouch Cells: Part II. Long-Term Cycling, Stack Pressure Growth, Isothermal Microcalorimetry, and Lifetime Projection Open
Part II of this 2-part series examines the impact of competitive graphite materials on NMC811 pouch cell performance using Ultra-High Precision Coulometry (UHPC), isothermal microcalorimetry, and in-situ stack growth. A simple lifetime pro…
View article: Cycling Performance of NMC811 Anode-Free Pouch Cells with 65 Different Electrolyte Formulations
Cycling Performance of NMC811 Anode-Free Pouch Cells with 65 Different Electrolyte Formulations Open
Liquid electrolytes for anode-free Li metal batteries (LMBs) provide a cost-effective path to high energy density. However, liquid electrolytes are challenging due to the reactivity of Li 0 with the electrolyte and the resulting Li loss, a…
View article: Investigating Parasitic Reactions in Anode-Free Li Metal Cells with Isothermal Microcalorimetry
Investigating Parasitic Reactions in Anode-Free Li Metal Cells with Isothermal Microcalorimetry Open
Anode-free Li metal cells are one of the most appealing energy storage technologies beyond Li-ion batteries due to their superior theoretical specific and volumetric energy densities. However, long cycle life in an anode-free cell remains …
View article: Optimizing Cycling Conditions for Anode-Free Lithium Metal Cells
Optimizing Cycling Conditions for Anode-Free Lithium Metal Cells Open
Optimizing the performance of the lithium metal anode is required to enable the next generation of high energy density batteries. Anode-free lithium metal cells are particularly attractive as they facilitate the highest energy density cell…
View article: Effects of Graphite Heat-Treatment Temperature on Single-Crystal Li[Ni<sub>5</sub>Mn<sub>3</sub>Co<sub>2</sub>]O<sub>2</sub>/Graphite Pouch Cells
Effects of Graphite Heat-Treatment Temperature on Single-Crystal Li[Ni<sub>5</sub>Mn<sub>3</sub>Co<sub>2</sub>]O<sub>2</sub>/Graphite Pouch Cells Open
In this work, the effect of the heat-treatment temperature of synthetic (artificial) graphite on the electrochemical performance of LiNi 0.5 Mn 0.3 Co 0.2 O 2 /graphite pouch cells was explored and compared with cells utilizing commercial-…
View article: Resistance Growth in Lithium-Ion Pouch Cells with LiNi<sub>0.80</sub>Co<sub>0.15</sub>Al<sub>0.05</sub>O<sub>2</sub> Positive Electrodes and Proposed Mechanism for Voltage Dependent Charge-Transfer Resistance
Resistance Growth in Lithium-Ion Pouch Cells with LiNi<sub>0.80</sub>Co<sub>0.15</sub>Al<sub>0.05</sub>O<sub>2</sub> Positive Electrodes and Proposed Mechanism for Voltage Dependent Charge-Transfer Resistance Open
High nickel content positive electrode materials, like LiNi0.80Co0.15Al0.05O2 (NCA), have been observed to lose capacity due to impedance growth when cycled above 4.1 V vs. Li/Li+. In this paper, we tested pouch cells with NCA positive ele…
View article: Surface Area of Lithium-Metal Electrodes Measured by Argon Adsorption
Surface Area of Lithium-Metal Electrodes Measured by Argon Adsorption Open
Rechargeable cells that rely on the stripping and plating of lithium during discharge and charge, respectively, must maintain smooth and flat lithium morphology to attain long cycle life. Higher surface area lithium metal, associated with …
View article: Hot Formation for Improved Low Temperature Cycling of Anode-Free Lithium Metal Batteries
Hot Formation for Improved Low Temperature Cycling of Anode-Free Lithium Metal Batteries Open
A new "hot formation" protocol is proposed to improve lower temperature cycling of lithium metal batteries. The cycling stability of anode-free pouch cells under low pressure (75 kPa) is shown to decline significantly as the cycling temper…
View article: Exploring the Impact of Mechanical Pressure on the Performance of Anode-Free Lithium Metal Cells
Exploring the Impact of Mechanical Pressure on the Performance of Anode-Free Lithium Metal Cells Open
In the pursuit of surpassing the energy density of conventional lithium ion cells, significant efforts have been made to develop lithium metal cells. However, many reports in the literature utilize Li-metal cells with significant excess li…
View article: Combinatorial Methods for Improving Lithium Metal Cycling Efficiency
Combinatorial Methods for Improving Lithium Metal Cycling Efficiency Open
An efficient combinatorial approach for the design and evaluation of surface coatings to improve lithium metal cycling efficiency is demonstrated. The reliability of a 64 electrode combinatorial cell was verified through lithium metal cycl…
View article: Volume, Pressure and Thickness Evolution of Li-Ion Pouch Cells with Silicon-Composite Negative Electrodes
Volume, Pressure and Thickness Evolution of Li-Ion Pouch Cells with Silicon-Composite Negative Electrodes Open
In-situ volume, pressure and thickness measurements were performed on Li-ion pouch cells with various silicon-composite negative electrodes to quantify electrode volume expansion. Li(Ni1-x-yCoxAly)O2/SiO-graphite, LiCoO2/Si Alloy-graphite …
View article: An Analysis of Artificial and Natural Graphite in Lithium Ion Pouch Cells Using Ultra-High Precision Coulometry, Isothermal Microcalorimetry, Gas Evolution, Long Term Cycling and Pressure Measurements
An Analysis of Artificial and Natural Graphite in Lithium Ion Pouch Cells Using Ultra-High Precision Coulometry, Isothermal Microcalorimetry, Gas Evolution, Long Term Cycling and Pressure Measurements Open
Natural graphite (NG) negative electrode materials can perform poorly compared to synthetic, or artificial, graphite (AG) negative electrodes in certain lithium ion cells. LiNi0.5Mn0.3Co0.2O2(NMC532)/(AG or NG) pouch cells were tested with…
View article: Effect of Substituting LiBF<sub>4</sub>for LiPF<sub>6</sub>in High Voltage Lithium-Ion Cells Containing Electrolyte Additives
Effect of Substituting LiBF<sub>4</sub>for LiPF<sub>6</sub>in High Voltage Lithium-Ion Cells Containing Electrolyte Additives Open
This work evaluates the performance of LiBF4-containing electrolytes in lithium-ion cells charged to high voltages (>4.4 V) and explores the compatibility of LiBF4 with additives known to improve the performance of LiPF6-based electrolytes…