A5086168101- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Advanced battery technologies research
- Thermal Expansion and Ionic Conductivity
- Extraction and Separation Processes
- Quantum and electron transport phenomena
- Supercapacitor Materials and Fabrication
- Molecular Junctions and Nanostructures
- Semiconductor materials and devices
- Advancements in Semiconductor Devices and Circuit Design
- Transition Metal Oxide Nanomaterials
- Graphene research and applications
- Electrical Contact Performance and Analysis
- Metal Extraction and Bioleaching
- Physics of Superconductivity and Magnetism
- Chemical Synthesis and Characterization
- Chalcogenide Semiconductor Thin Films
- Advanced Mathematical Theories and Applications
Hydro-Québec
2014-2023
Varian Medical Systems (Switzerland)
2017
McGill University
2008-2014
Abstract Recently, intensive efforts are dedicated to convert and store the solar energy in a single device. Herein, dye-synthesized cell technology is combined with lithium-ion materials investigate light-assisted battery charging. In particular we report direct photo-oxidation of lithium iron phosphate nanocrystals presence dye as hybrid photo-cathode two-electrode system, metal anode hexafluorophosphate carbonate-based electrolyte; configuration corresponding ion Dye-sensitization...
Abstract Energy storage with high energy density and low cost has been the subject of a decades-long pursuit. Sodium-ion batteries are well expected because they utilize abundant resources. However, lack competent cathodes both large capacities long cycle lives prevents commercialization sodium-ion batteries. Conventional hexagonal-P2-type structures suffer from structural degradations when sodium content falls below 33%, or integral anions participate in gas evolution reactions. Here, we...
In liithium–sulfur battery the lithium metal surface was analyzed by <italic>in situ</italic> Raman spectroscopy.
P2-type sodium-manganese-based layered cathodes, owing to their high capacity from both cationic and anionic redox, are a potential candidate for Na-ion batteries (NIBs) replace Li-ion technology in certain applications. Still, the structure instability originating irreversible oxygen redox at voltage remains challenge. Here, sustainability cobalt-free P2-Na0.72 Mn0.75 Li0.24 X0.01 O2 (X = Ti/Si) cathode is developed. The outstanding retention after 150 cycles obtained half-cells. finding...
Garnet-type lithium lanthanum zirconate (Li7La3Zr2O12, LLZO)-based ceramic electrolyte has potential for further development of all-solid-state energy storage technologies including Li metal batteries as well Li–S and Li–O2 chemistries. The essential prerequisites such LLZO's compactness, stability, ionic conductivity this are nearly achievable via the solid-state reaction route (SSR) at high temperatures, but it involves a trade-off between caveats because loss volatilization. For example,...
Based on neutron powder diffraction (NPD) and high angle annular dark field scanning transmission electron microscopy (HAADF-STEM), we show that calcium ions help eliminate the Fe-antisite defects by controlling nucleation evolution of LiFePO4 particles during their hydrothermal synthesis. This Ca-regulated formation has an overwhelming impact removal iron antisite subsequent carbon-coating step since (i) almost all aggregate at surface crystal when crystals are small enough (ii) concomitant...
Recently, the formation of ceramic–ionic liquid composite has attracted huge interest in scientific community. In this work, we investigated chemical reactions occurring between NASICON LAGP ceramic electrolyte and ionic pyr13TFSI. This study allowed us to identify cation exchange reaction pyr13-Li on surface, forming a LiTFSI salt that was detected by nuclear magnetic resonance analysis. addition, using 6Li foils, succeeded demonstrating both LiTFSI:pyr13TFSI participate diffusion Li ions...
Sodium-ion batteries (SIBs) are in the spotlight because of their potential use large-scale energy storage devices due to abundance and low cost sodium-based materials. There many SIB cathode materials under investigation but only a few candidate such as carbon, oxides alloys were proposed anodes. Among these anode materials, hard carbon shows promising performances with operating relatively high specific capacity. Unfortunately, its initial coulombic efficiency limit commercial...
Aqueous lithium-ion batteries are emerging as strong candidates for a great variety of energy storage applications because their low cost, high-rate capability, and high safety. Exciting progress has been made in the search anode materials with capacity, toxicity, conductivity; yet, most materials, equilibrium voltages, facilitate hydrogen evolution. Here, we show application olivine FePO4 amorphous FePO4·2H2O aqueous batteries. Their capacities reached 163 82 mA h/g at current rate 0.2 C,...
One of the main challenges in improving fast charging lithium-ion batteries is development suitable active materials for cathodes and anodes. Many suffer from unacceptable structural changes under high currents and/or low intrinsic conductivities. Experimental measurements are required to optimize these properties, but few techniques able spatially resolve ionic transport properties at small length scales. Here we demonstrate an atomic force microscope (AFM)-based technique measure local on...
We report on \textit{ab initio} electronic structure simulations of Li$_2$O$_2$, where 1.6% lithium atoms are substituted by silicon. It is demonstrated that this leads to the formation conducting impurity states in band gap Li$_2$O$_2$. show these originate from antibonding orbitals oxygen pairs and remarkably stable against possible polaron (upon electron injection). Through preemption mechanism, proposed compound expected significantly higher mobility than stoichiometric which could have...
We report a theoretical analysis of current-current correlations in an arbitrary noninteracting mesoscopic phase-coherent device connected to external leads, response the sharp turning off bias voltage. Based on Keldysh nonequilibrium Green's function formalism, we provide exact analytical solution time-dependent far from equilibrium, nonlinear regime. An important feature our theory is that it does not rely commonly used wideband approximation so full electronic structure leads taken into...
In the battery industry, performance of lithium-ion batteries operating at a high voltage is enhanced by utilizing functional additives in electrolytes to achieve higher energy densities and longer lifetimes. These chemically stabilize electrolyte aid formation stable cathode interphase (CEI). this paper, investigation oxidative potentials more than 100 additives, using density theory calculations determine best candidates for CEI formation, reported. The method was validated comparing...
The atomic and electronic structures of the LiFePO4 (LFP) surface, both bare reconstructed upon possible oxygenation, are theoretically studied by ab initio methods. On basis total energy calculations, structure oxygenated surface is proposed, effect reconstruction on properties clarified. While LFP(010) insulating, adsorption oxygen leads to emergence semimetallic behavior inducing conducting states in band gap system. physical origin these investigated. We further demonstrate that...
Abstract Densification of ceramic electrolytes is a key enabler in producing electrolyte pellets for solid‐state batteries. This requires understanding the correlation between starting grain size electrolytes, chemical phase evolution and degree compaction which determine ion conductivity stability solid electrolytes. In our work we were able to optimize densification process LATP at 700 °C with high total ionic 3.45×10 −4 S cm −1 after hot pressing, balancing pristine crystallite AlPO 4...
Additional electrons injected into lithium peroxide become self-trapped to form polarons. While the final stage of this self-trapping phenomenon has been examined extensively, electron-phonon interactions that drive process remain largely unaddressed in first-principles literature. In order understand dynamical polaron formation peroxide, we examine initial embryonic through calculations interaction between lattice and an extra electron crystal. It is shown perceivably strong with such...