A5064472955- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Graphene research and applications
- Layered Double Hydroxides Synthesis and Applications
- Thermal Expansion and Ionic Conductivity
- Photonic and Optical Devices
- MXene and MAX Phase Materials
- Plasmonic and Surface Plasmon Research
- 2D Materials and Applications
- Advanced battery technologies research
- Advanced Battery Technologies Research
- ZnO doping and properties
- Photonic Crystals and Applications
- Ferroelectric and Negative Capacitance Devices
- Advanced ceramic materials synthesis
- Perovskite Materials and Applications
- Semiconductor materials and interfaces
- Anodic Oxide Films and Nanostructures
- Iron oxide chemistry and applications
- Ga2O3 and related materials
- Thermal properties of materials
- Gas Sensing Nanomaterials and Sensors
- Gold and Silver Nanoparticles Synthesis and Applications
- Semiconductor materials and devices
King Abdullah University of Science and Technology
2017-2023
Research in the field of aluminum batteries has focused heavily on electrodes made carbonaceous materials. Still, capacities reported for these multivalent systems remain stubbornly low. It is believed that a high structural quality graphitic carbons and/or specific surface areas >1000 m2 g-1 are key factors to obtain optimal performance and cycling stability. Here an chloride battery presented which reduced graphene oxide (RGO) powder, dried under supercritical conditions, used as active...
The electrochemical performance of aluminum-sulfur batteries is beset by poor stability and sluggish charge-storage properties. To address these issues, carbon allotropes have been used as electrode fillers, but successful outcomes remain inexplicably elusive. Here, a composite sulfur small-diameter single-walled nanotubes was studied cathode for AlCl3:[EMIM]-based aluminum batteries. presence nanotubes, while enabling high capacity (1024 mAh g–1) with slower decay reducing the...
In a one-pot hydrothermal synthesis of MRI-active CoFe<sub>2</sub>O<sub>4</sub> nanoparticles grafted onto graphene flakes, careful selection the parent oxide enables major increments in grafting yield and proton relaxivity rates.
Structural breakdown and capacity loss of a red phosphorus-based anode material for lithium-ion batteries have been considerably attenuated with the addition single-walled carbon nanotubes.
The nickel-rich NMC955 (LiNi0.90Mn0.05Co0.05O2) cathode, with minimal cobalt, is the zenith of NMC technology but faces structural and thermal stability challenges, losing an average 15 % its capacity in first discharge. Here, by selecting appropriate materials synthesis methods all-solid-state battery cell, this challenge effectively mitigated. A sustainable fabrication LiNMC955 positive electrode, excluding PVDF using styrene-butadiene rubber SBR, demonstrates high retention cells, without...
Abstract Carbon cathodes have shown excellent electrochemical behavior in aluminum batteries based on non‐aqueous electrolytes. By contrast, their use Al systems operating a salt‐water medium is plagued by poor and unstable performance. Herein, it sustained that successful C cathode for rechargeable aqueous requires surface customization to enable hydrophilicity grafting of charged molecules. Employing freeze‐dried reduced graphene oxide (rGO) as the active electrode material, an Al‐C...
Superconductivty has recently been induced in MXenes through surface modification. However, the previous reports have mostly based on powders or cold-pressed pellets, with no known intrinsic superconsucting properties of at nanoale. Here, it is developed a high-temperature atomic exchange process NH
Abstract Ultraviolet (UV) photodetectors often suffer from the lack of spectral selectivity due to strong interference visible light. In this study, exceptional electrical properties graphene and unique optical carbon nitride thin films (CNTFs) are used design visible‐blind UV photodetectors. First, polycrystalline CNTFs with different thicknesses (12–94 nm) produced by thermal vapor condensation. Compared bulk powder, these have a considerable sp 2 nitrogen deficiency, which is thickness...
The melt phase encapsulation of gadolinium iodide (GdI3) in small internal diameter carbon nanotubes (CNTs) was explored to understand how the tubular structure host could chemically stabilize a hygroscopic metal halide. However, given distribution diameters as-received CNTs, final sample consisted mixed products. These varied from monoelemental iodine chain atomic layer deposition binary Supported by density functional theory calculations, these observations led proposition morphological...
Abstract In energy storage systems, every component that makes up an electrode can greatly affect the electrochemical performance. One example includes so-called “binders” used in secondary batteries. Herein, we compare influence of using polyvinylidene fluoride (PVDF) or sodium carboxymethyl cellulose (CMC) on performance aluminium chloride battery (ACB) system. The active material cathode was a reduced graphene oxide dried under supercritical conditions (RGOCPD). Interestingly, while PVDF...
The ability to control lattice orientation is often an essential requirement in the growth of both 2D van der Waals (vdW) layered and nonlayered thin films. Here, a unique universal phenomenon termed "lattice heredity" (LOH) reported. LOH enables product films (including 2D-layered materials) inherit from reactant chemical conversion process, excluding on substrate order. process universality demonstrated by investigating transformations carbonization, nitridation, sulfurization epitaxial...
Being environmentally friendly, safe and easy to handle, aqueous electrolytes are of particular interest for next-generation electrochemical energy storage devices. When coupled with an abundant, recyclable low-cost electrode material such as aluminum, the promise a green economically sustainable battery system has extraordinary appeal. In this work, we study interaction electrolyte aluminum plate anode various graphitic cathodes. Upon establishing boundary conditions optimal performance,...
Abstract As a promising electrochemical energy storage system, rechargeable aluminum batteries face critical challenges in their quest for commercial viability. While the design of suitable cathodes has attracted much attention, chemical composition and purity been less concern. This is especially true carbon cathodes, where presence metallic impurities often overlooked. Herein, we demonstrate influence that transition metals exert on electrochemistry nanotube non‐aqueous batteries. In...
Graphene nanowalls (GNWs) can be described as extended nanosheets of graphitic carbon where the basal planes are perpendicular to a substrate. Generally, existing techniques grow films GNWsare based on plasma-enhanced chemical vapor deposition (PECVD) and use diverse substrate materials (Cu, Ni, C, etc) shaped foils or filaments. Usually, patterned rely substrates priorly modified by costly cleanroom procedures. Hence, we report here characterization, transfer application wafer-scale...
Redox species such as transition metals may, unknowingly, integrate carbon materials that are produced (or supplied) for the assembling of electrodes in batteries, supercapacitors, and fuel cells. The extent to which these alter electrochemical profile carbons affect performance and/or degradation energy storage systems is still not fully appreciated. Alkaline oxidation fusion) a promising approach disintegrate nanocarbons subsequent study their chemical composition by routine analytical...
Abstract In the last decade, catalytic chemical vapor deposition (CVD) has been intensively explored for growth of single‐layer graphene (SLG). Despite scattering guidelines and procedures, variables such as surface texture/chemistry catalyst metal foils, carbon feedstock, process parameters have well‐scrutinized. Still, questions remain on how best to standardize procedure. The possible correlation procedures between different CVD setups is an example. Here, two thermal reactors were grow...
An equivalent circuit model for plasmonic slot waveguide-based devices is presented. Taking advantage of the high mode confinement provided by this waveguide geometry, we express geometries using transmission line parameters and T-junctions lumped elements. By combining these fundamental building blocks, subsequently introduce models stub filters branch-line couplers. We show that circuits, if designed with sharp discontinuities, feature low losses are comparable to from RF circuits even...
Plasmonic hybrids are introduced to replace photonic optical for coherent reception. These plasmonic circuits offer a compact footprint and fabrication compatible with many electronic platforms as one only relies on metallic layer stacks. To mitigate the losses, we propose new designs shortest propagation paths. Simulations predict footprints of less than 1 µm 2 excess losses below dB. In experiment fabricated , 3.3 dB, excellent broadband performance signals over more 100 nm. results need...
Tailoring the pore size distribution of carbon-based cathodes is a decisive factor for electrochemical performance aluminum batteries. In article number 1803584, Pedro M. F. J. Costa and co-workers show how mesopores in reduced graphene oxide powder facilitate movement large chloroaluminate ions, effectively minimizing inactive mass content electrode compensating an ordinary micropore volume.
Aqueous aluminum (Al) batteries are promising as a low cost, high energy density, and safe storage solution. However, significant challenges persist in using Al anodes with water-based electrolytes acidic regimes. Several approaches have been put forward to resolve these obstacles, but there is an ongoing debate on their viability. In this Perspective, we outline the current understanding of best-performing systems suggest future research directions.
The electrochemical performance of aluminum-sulfur batteries is beset by poor stability and sluggish charge-storage properties. To address these issues, carbon allotropes have been used as electrode fillers, but successful outcomes remain inexplicably elusive. Here, a composite sulfur small diameter single-walled nanotubes synthesized cathode for reversible batteries. assembled delivers high capacity 1024 mAh/g effectively reduces the cell polarization 37%. Moreover, use small-diameter SWCNT...
Concerns over lithium-ion battery safety and environmental impact have led to increased exploration of alternative energy storage systems. Of these, aluminum is particular interest, being environmentally friendly, safe easy handle. In this work, we explore graphitic cathodes with an aqueous electrolyte (aluminum trifluoromethanesulfonate) study their electrochemical performance. Finally, a reduced graphene cathode tailored porosity results in eco-friendly inherently rechargeable promising performance
Concerns over lithium-ion battery safety and environmental impact have led to increased exploration of alternative energy storage systems. Of these, aluminum is particular interest, being environmentally friendly, safe easy handle. In this work, we explore graphitic cathodes with an aqueous electrolyte (aluminum trifluoromethanesulfonate) study their electrochemical performance. Finally, a reduced graphene cathode tailored porosity results in eco-friendly inherently rechargeable promising performance