A5006211396- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- Advanced Battery Materials and Technologies
- Graphene research and applications
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Advanced Battery Technologies Research
- Luminescence Properties of Advanced Materials
- Thermal Expansion and Ionic Conductivity
- Gas Sensing Nanomaterials and Sensors
- ZnO doping and properties
- Conducting polymers and applications
- Extraction and Separation Processes
- Ga2O3 and related materials
- Semiconductor materials and devices
- Advanced ceramic materials synthesis
- Thermal properties of materials
- Advanced Photocatalysis Techniques
- Transition Metal Oxide Nanomaterials
- Gold and Silver Nanoparticles Synthesis and Applications
- MXene and MAX Phase Materials
- Recycling and Waste Management Techniques
- Additive Manufacturing and 3D Printing Technologies
- Dielectric materials and actuators
- Glass properties and applications
Pennsylvania State University
2019-2025
China Animal Health and Epidemiology Center
2025
Marcus (United States)
2023-2025
Jiangsu University
2024-2025
Shenyang Jianzhu University
2025
Materials Research Institute (United States)
2025
Chinese People's Armed Police Force
2023-2024
First Hospital of Lanzhou University
2023-2024
Tianjin Medical University
2023-2024
Tianjin University
2023-2024
As with donuts, the holes matter Improving density of stored charge and increasing speed at which it can move through a material are usually opposing objectives. Sun et al. developed Nb 2 O 5 /holey graphene framework composite tailored porosity. The three-dimensional, hierarchically porous holey acted as conductive scaffold to support . A high mass loading improved power capability were reached by tailoring porosity in backbone higher transport architecture. interconnected network provided...
A superior mix of big and small Graphene is often described as an unrolled carbon nanotube. However, although nanotubes are known for their exceptional mechanical conductivity properties, the same not true graphene-based fibers. Xin et al. intercalated fragments graphene into gaps formed by larger sheets that had been coiled Once annealed, large provided pathways conduction, while smaller helped reinforce The result? Superior thermal electrical strength. Science , this issue p. 1083
Ceramic aerogels are attractive for thermal insulation but plagued by poor mechanical stability and degradation under shock. In this study, we designed synthesized hyperbolic architectured ceramic with nanolayered double-pane walls a negative Poisson's ratio (-0.25) linear expansion coefficient (-1.8 × 10-6 per °C). Our display robust feature ultralow densities down to ~0.1 milligram cubic centimeter, superelasticity up 95%, near-zero strength loss after sharp shocks (275°C second) or...
Large-area freestanding graphene papers (GPs) are fabricated by electrospray deposition integrated with a continuous roll-to-roll process. Upon mechanical compaction and thermal annealing, GPs can achieve conductivity of as high 1238.3–1434 W m−1 K−1. The super-thermally conductive display an outstanding heat-spread ability more efficient in removing hot spots than Cu Al foils. As service to our authors readers, this journal provides supporting information supplied the authors. Such...
Abstract Flexible graphene paper (GP) pillared by carbon black (CB) nanoparticles using a simple vacuum filtration method is developed as high‐performance electrode material for supercapacitors. Through the introduction of CB spacers, self‐restacking sheets during process mitigated to great extent. The GP‐based supercapacitors exhibit excellent electrochemical performances and cyclic stabilities compared with GP without addition nanoparticles. At scan rate 10 mV s −1 , specific capacitance...
A nano-scaled coating of titanium oxide (TiO2) on graphene (G) has been achieved via a novel atomic layer deposition (ALD) method. As potential supercapacitor material, the TiO2-G composites exhibited capacity 75 F/g and 84 at scan rate 10 mV/s for grown using 50 100 ALD cycles, respectively. The nearly identical Nyquist plots compared with those pure demonstrated that possess excellent conductivity charge transfer open structures ion diffusion. In addition, even 3-4 times additional mass...
We report a simple, efficient and versatile method for assembling metal oxide nanomaterial-graphene core-shell structures. An ultraviolet photodetector fabricated from the ZnO nanoparticle-graphene structures showed high responsivity fast transient response, which are attributed to improved carrier transport efficiency arising graphene encapsulation.
Chemical doping of nitrogen into graphene can significantly enhance the reversible capacity and cyclic stability graphene-based lithium ion battery (LIB) anodes, first principles calculations based on density functional theory suggested that pyridinic-N shows stronger binding with Li reduced energy barrier for diffusion thus is more effective storage than pyrrolic graphitic-N. Here, we report a novel rapid (∼30 seconds) process to fabricate nitrogen-doped (NGr) by simultaneous thermal...
Organic phase change materials (PCMs) have been utilized as latent heat energy storage and release media for effective thermal management. A major challenge exists organic PCMs in which their low conductivity leads to a slow transient temperature response reduced transfer efficiency. In this work, 2D thermally annealed defect-free graphene sheets (GSs) can be obtained upon high annealing removing defects oxygen functional groups. As result of greatly phonon scattering centers transport, the...
The performance of graphene field-effect transistors is limited by the drastically reduced carrier mobility on silicon dioxide (SiO2) substrates. Here we demonstrate an ultrasensitive ultraviolet (UV) phototransistor featuring organic self-assembled monolayer (SAM) sandwiched between inorganic ZnO quantum dots decorated channel and a conventional SiO2/Si substrate. Remarkably, room-temperature chemical-vapor-deposition grown SAM order-of-magnitude higher than SiO2, thereby reducing electron...
Uniform ZnO QDs with controllable sizes from 2 to 7 nm on graphene were synthesized. The QD/graphene nanocomposites show enhanced electrochemical properties as lithium ion battery anodes.
Transition metal oxides, used as LIB anodes, typically experience significant capacity fading at high rates and long cycles due to chemical mechanical degradations upon cycling. In this work, an effective strategy is implemented mitigate of Co3O4 by use hollow mesoporous spheres graphene sheets in a core–shell geometry. The structure exhibits reversible 1076 mAh g–1 current density 0.1 A g–1, excellent rate performance from 5.0 g–1. graphene/Co3O4 nanosphere composite electrode also displays...
Amorphous TiO2 thin films were conformally coated onto the surface of both graphene (G) and multiwalled carbon nanotube (CNT) samples using atomic layer deposition (ALD). An ultrathin Al2O3 adhesion was employed to obtain conformal ALD films. Using 1 M KOH as electrolyte, electrochemical characteristics grown 25 50 cycles then determined cyclic voltammetry, galvanostatic charge/discharge curves, impedance spectroscopy. Because ultrathin, poor electrical conductivity low ionic diffusivity did...
A uniform carbon dot-decorated TiO<sub>2</sub> nanotube array composite heterojunction with full spectrum wavelength light activation was fabricated <italic>via</italic> a facile electrochemical strategy for efficient dye degradation and overall water splitting.
Ultrathin gold island films on transparent substrates display a characteristic surface plasmon (SP) absorption band in which the peak position and full width at half-maximum (fwhm) are highly sensitive to film morphology. In present study, we investigated temperature dependence of morphological evolution corresponding unique resonance (SPR) properties variation ultrathin (5 nm nominal thickness) upon rapid thermal annealing for 180 s different temperatures ranging from 100 700 °C. The...
Atomic layer deposition (ALD) was used to deposit TiO2 anode material on high surface area graphene (reduced oxide) sheets for Li-ion batteries. An Al2O3 ALD ultrathin as an adhesion conformal of the films at 120 ° C onto conducting sheets. The were nearly amorphous and These nanoscale coatings minimized effect low diffusion coefficient lithium ions in bulk TiO2. exhibited stable capacities ∼120 mAh g−1 ∼100 cycling rates 1 A 2 g−1, respectively. also displayed excellent stability with ∼95%...