A5091686026- Advancements in Solid Oxide Fuel Cells
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Quantum Dots Synthesis And Properties
- Electronic and Structural Properties of Oxides
- Advanced Battery Technologies Research
- Chemical Looping and Thermochemical Processes
- Magnetic and transport properties of perovskites and related materials
- ZnO doping and properties
- Advanced Photocatalysis Techniques
- Copper-based nanomaterials and applications
- Chalcogenide Semiconductor Thin Films
- Thermal Expansion and Ionic Conductivity
- Advanced battery technologies research
- Catalytic Processes in Materials Science
- Advanced Fiber Optic Sensors
- Catalysis and Oxidation Reactions
- Polyoxometalates: Synthesis and Applications
- Gas Sensing Nanomaterials and Sensors
- Electrochemical Analysis and Applications
- Solid-state spectroscopy and crystallography
- Conducting polymers and applications
- Phosphorus and nutrient management
Lawrence Berkeley National Laboratory
2019-2025
Lanzhou University
2024
Vanderbilt University
2018-2020
Virginia Tech
2014-2018
Xi'an Jiaotong University
2010-2013
University of Virginia
2004
Li7La3Zr2O12 (LLZO) is a garnet-type material that demonstrates promising characteristics for all-solid-state battery applications due to its high Li-ion conductivity and compatibility with Li metal. The primary limitation of LLZO the propensity short-circuiting at low current densities. Microstructure features such as grain boundaries, pore character, density all contribute this shorting phenomenon. Toward goal understanding processing-structure relationships practical design solid...
The mass adoption of electric vehicles is hindered by the inadequate extreme fast charging (XFC) performance (i.e., less than 15 min time to reach 80% state charge) commercial high-specific-energy >200 Wh/kg) lithium-ion batteries (LIBs). Here, enable XFC LIBs, we propose regulation battery's self-generated heat via active thermal switching. We demonstrate that retaining during with switch OFF boosts cell's kinetics while dissipating after ON reduces detrimental reactions in battery. Without...
Catalyst layer inks are examples of biphasic material systems composed a solid material, polymer, and solvent. Nanoscale interactions between the individual constituents can alter macroscopic properties that relevant for coating manufacturing processes (i.e. viscosity, surface tension, aggregation, rheology). Control over these macroscale important controlled electrode formation during scalable roll-to-roll manufacturing. The underlying include polymer|particle, particle|solvent,...
Intrinsic material microstructure features, such as pores or void spaces, grains, and defects can affect local lithium-ion concentration profiles transport properties in solid ion conductors. The formation of lithium-deficient -excess regions accelerate degradation phenomena, dendrite formation, lithium plating, electrode/electrolyte delamination. This paper evaluates the effects spaces have on tortuosity a garnet-type Li7La3Zr2O12 electrolyte. Synchrotron X-ray tomography is used to obtain...
The imperative shift towards decarbonization necessitates the production of clean hydrogen through water electrolysis, powered by renewable energy sources. Among electrolyzer technologies, proton-exchange-membrane (PEM) systems emerge as a promising option for large-scale generation due to their modular design and rapid response, aligning well with intermittency energy. In this study, we employ tape casting method fabricate microporous layers (MPLs), both single layer bilayer over commercial...
In this paper, p-type CuInS2 quantum dots are synthesized by a solvothermal route and incorporated with n-type TiO2 nanoparticles thermal treatment process. Transmission electron microscopy (TEM) results indicate that the distribute uniformly size is ∼3.4 nm. Photocatalytic activities of sensitized evaluated degradation methyl orange aqueous solution under ultraviolet (UV) visible (vis) light irradiation show an enhanced performance, compared pure dots. Microstructural, morphological,...
Revealing the local structure of solid electrolytes (SEs) with electron microscopy is critical for fundamental understanding performance solid-state batteries (SSBs). However, intrinsic structural information in SSB can be misleading if sample's interactions beams are not fully understood. In this work, we systematically investigate effect on Al-doped lithium lanthanum zirconium oxide (LLZO) under different imaging conditions. Li metal observed to grow directly clean surface LLZO. The growth...
ZnO microspheres sensitized by CuInSe(2) and CuInS(2) nanoparticles, which were synthesized a solvothermal method have size about 20 3.5 nm, respectively, used to photodegradation of rhodamine B under an irradiation mercury lamp. Results show that the photocatalytic activities ZnO/CuInSe(2) ZnO/CuInS(2) are much higher than because formation heterojunction in two systems. It is also noted exhibits activity ZnO/CuInSe(2), probably related more suitable band gap sunlight for nanocrystals...
Micro‐/mesoporous Si OC bulk ceramics with high surface area and bimodal pore size distribution were prepared by pyrolysis of polysiloxane in argon atmosphere at 1100°C–1400°C followed etching hydrofluoric acid solution. Their thermal behaviors, phase compositions, microstructures different nano‐SiO 2 filler contents temperatures investigated XRD , SEM DSC BET . The SiO fillers ‐rich clusters the matrix act as pore‐forming sites can be etched away HF At same time, promotes separation during...
Tape casting is an attractive technology for the scalable manufacturing of thin lithium garnet electrolyte (LLZO) layers solid state battery applications. Processing LLZO complicated by many factors including volatilization, abnormal grain growth, and phase instability, which are exacerbated high surface area to volume ratios. In this work a sintering protocol commercially available Li6.25Al0.25La3Zr2O12 (Al-LLZO) powder was developed that requires no mother-powder covering or externally...
Advancement of solid state electrolytes (SSEs) for all batteries typically focuses on modification a parent structural framework improved conductivity, \textit{e.g.} cation substitution an immobile ion or varying the concentration mobile ion. Therefore, novel frameworks can be disruptive by enabling fast conduction aided different structure and diffusion mechanisms, unlocking optimal conductors with properties (\textit{e.g.} mechanical properties, sintering needs, electrochemical stability)...
<title>Abstract</title> The densification of solid electrolyte (SE) materials is crucial for improving the performance and stability solid-state batteries. In this study, role granular creep in SE investigated using numerical simulations experimental validation on Li6PS5Cl (LPSCl) seperators. Using discrete element method (DEM) simulations, we analyze influence strain rate cohesion force chain evolution, particle rearrangement, porosity reduction. Our results indicate that slow rates promote...
Green hydrogen is essential to achieving carbon neutrality, and solid oxide electrolysis cells can produce using renewable power waste heat. Insufficient long-term durability of has impeded their commercialization. Here, coatings in the porous stainless steel support metal-supported (MS-SOECs) are used dramatically improve performance durability. The degradation rate uncoated MS-SOECs highly dependent on current density, with fastest occurring at highest density tested, 0.5 A cm–2. At this...
Here we investigate the competitive electrosorption of mono- and divalent phosphate anions through electrochemical desalination- dilatometry-based experiments. Through in situ dilatometry, monitor strain at electrode surface as cations are electrosorbed. Strain measurements show that presence ions promotes a greater than anticipated expansion during cation (Na+) electrosorption. The observed with Na+ equaled HPO42–. Because ionic radius is smaller HPO42–, symmetric suggests do not completely...
Solid-state batteries employ composite electrodes which contain a solid ion conductor, active material, conductive additive, and binder. The electrode microstructure fundamentally differs from in conventional because the pore region is blocking. While there extensive research on how to integrate lithium metal with inorganic electrolytes, less knowledge an can be integrated electrolyte. Solution processing techniques are ideal for scalable manufacturing rely creating ink combines binder,...
This procedure describes the setup and testing protocol for metal-supported solid oxide electrolysis cell (MS-SOEC) button performance evaluation. It defines a standard protocol, materials selection, identifies common pitfalls MS-SOEC cells.