A5016696217- Advancements in Battery Materials
- Additive Manufacturing and 3D Printing Technologies
- Additive Manufacturing Materials and Processes
- Nanoporous metals and alloys
- Supercapacitor Materials and Fabrication
- Advanced Battery Materials and Technologies
- Recycling and Waste Management Techniques
- Electrocatalysts for Energy Conversion
- Catalytic Processes in Materials Science
- High Entropy Alloys Studies
- Graphene research and applications
- Welding Techniques and Residual Stresses
- Conducting polymers and applications
- Modular Robots and Swarm Intelligence
- Laser Material Processing Techniques
- Extraction and Separation Processes
- Advanced Battery Technologies Research
- Metallic Glasses and Amorphous Alloys
- Cellular and Composite Structures
- Semiconductor materials and devices
- Fuel Cells and Related Materials
- Advanced Materials and Mechanics
- Nonlinear Optical Materials Studies
- Catalysis and Oxidation Reactions
- Titanium Alloys Microstructure and Properties
Lawrence Livermore National Laboratory
2015-2024
Lawrence Livermore National Security
2015-2020
Sun Yat-sen University
2020
Hong Kong Polytechnic University
2009-2011
In situ optical absorptivity measurements are carried out to clarify the physics of laser‐material interactions involved and validate both finite element analytical models describing laser powder bed fusion processing. Absorption energy is evaluated directly using precise calorimetry compared melt pool depths for common structural metal alloys (Ti‐6Al‐4V, Inconel 625, stainless steel 316L) as a function incident power, scan velocity beam diameter. Changes in all materials found vary strongly...
Monolithic nanoporous metals, derived from dealloying, have a unique bicontinuous solid/void structure that provides both large surface area and high electrical conductivity, making them ideal candidates for various energy applications. However, many of these applications would greatly benefit the integration an engineered hierarchical macroporous network increases directs mass transport. We report on 3D (three-dimensional)-printed gold (3DP-hnp-Au) with nonrandom macroarchitectures by...
Much progress has recently been made in the development of active materials, electrode morphologies and electrolytes for lithium ion batteries. Well-defined studies on size effects three-dimensional (3D) architecture, however, remain to be rare due lack suitable material platforms where critical length scales (such as pore thickness material) can freely deterministically adjusted over a wide range without affecting overall 3D morphology electrode. Here, we report systematic study scale...
Two photon polymerization (TPP) is a precise, reliable, and increasingly popular technique for rapid prototyping of micro-scale parts with sub-micron resolution. The materials choice underlying this process are predominately acrylic resins cross-linked via free-radical polymerization. Due to the nature printing process, derived only partially cured corresponding mechanical properties, i.e. modulus ultimate strength, lower than if material were maximum extent. Herein, post-print curing...
Abstract Disruptive custom electronics require a transformation in energy storage systems from traditional thin‐film units to shape conformable 3D components. However, current thick electrodes suffer uncontrollable geometries and architectures, which lead ion diffusion limitations, poor mechanical properties. Here, designed, superelastic polypyrrole (PPy)‐coated graphene aerogel (GA) are fabricated via printing polymer self‐assembly methods. This resilient GA template (up 90% compression)...
Abstract Monolithic porous bulk materials have many promising applications ranging from energy storage and catalysis to high density physics. High resolution additive manufacturing techniques, such as direct laser writing via two photon polymerization (DLW‐TPP), now enable the fabrication of highly microlattices with deterministic morphology control. In this work, DLW‐TPP is used print millimeter‐sized foam reservoirs (down 0.06 g cm −3 ) tailored density‐gradient profiles, where varied by...
We demonstrate the synthesis of high-surface-area, low-density refractory aerogels. The monolithic hafnium boride (HfB2) and zirconium (ZrB2) aerogels are prepared via borothermal reduction precursor hafnia zirconia aerogels, respectively, consisting a fine mixture boron nanoparticles metal oxide. This boron–metal oxide (B–MO2) composite aerogel was synthesized by modifying pure ethanol solvent typically used in epoxide-initiated sol–gel with an ethanolic nanoparticle suspension. After...
The processing of garnet-type solid-state electrolytes remains challenging as densification conventionally requires high sintering temperatures and long times, which can result in severe Li loss, the formation secondary phases, thus porosity low ionic conductivity. Here, we report an ultrafast method based on CO2 laser scanning with assistance a heating stage. We demonstrate rapid low-packing-density Li6.4La3Zr1.4Ta0.6O12 (LLZTO) films, are difficult to densify by conventional furnace...
The synthesis of ultralow-density (>5 mg/cm(3) ) bulk materials with interconnected nanotubular morphology and deterministic, fully tunable feature size, composition, density is presented. A thin-walled design realized by employing templating based on atomic layer deposition makes the material about 10 times stronger stiffer than aerogels same density.
Two-photon lithography (TPL) is a high-resolution additive manufacturing (AM) technique capable of producing arbitrarily complex three-dimensional (3D) microstructures with features 2–3 orders magnitude finer than human hair. This process finds numerous applications as direct route toward the fabrication novel optical and mechanical metamaterials, miniaturized optics, microfluidics, biological scaffolds, various other intricate 3D parts. As TPL matures, metrology inspection become crucial...
Safe, reliable materials with fast charging kinetics are required to increase the power density of batteries in electric vehicles. One potential avenue for improving involves disturbing electrode crystalline structure alter diffusion properties. However, it remains controversial whether amorphization universally benefits intercalation kinetics, and specific enhancement mechanisms respect counterpart often unclear. In this work, we systematically explore effects on Li+ using...