A5009468635- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Ferroelectric and Piezoelectric Materials
- Electrocatalysts for Energy Conversion
- Microwave Dielectric Ceramics Synthesis
- Electronic and Structural Properties of Oxides
- Extraction and Separation Processes
- Advanced Battery Technologies Research
- Multiferroics and related materials
- Fuel Cells and Related Materials
- Fiber-reinforced polymer composites
- Graphene research and applications
- Acoustic Wave Resonator Technologies
- Supercapacitor Materials and Fabrication
- Advanced battery technologies research
- Carbon Nanotubes in Composites
- Electrospun Nanofibers in Biomedical Applications
- Diamond and Carbon-based Materials Research
- Advancements in Solid Oxide Fuel Cells
- Magnetic and transport properties of perovskites and related materials
- Ion-surface interactions and analysis
- Catalytic Processes in Materials Science
- Thermal Expansion and Ionic Conductivity
- X-ray Diffraction in Crystallography
- Advanced ceramic materials synthesis
Forschungszentrum Jülich
2015-2024
Stadtwerke Jülich (Germany)
2017-2019
Ernst Ruska Centre
2016
RWTH Aachen University
2016
Instituto de Ciencia de Materiales de Sevilla
2013-2015
Universidad de Sevilla
2013-2015
Consejo Superior de Investigaciones Científicas
2014-2015
Technical University of Darmstadt
2005-2012
Institute of Crystallography
2010
Hiroshima University
2008
Abstract Water electrolysis is the key to a decarbonized energy system, as it enables conversion and storage of renewably generated intermittent electricity in form hydrogen. However, reliability challenges arising from titanium‐based porous transport layers (PTLs) have hitherto restricted deployment next‐generation water‐splitting devices. Here, shown for first time how PTLs can be adapted so that their interface remains well protected resistant corrosion across ≈4000 h under real...
The outstanding piezoelectric properties of lead zirconate titanate (PZT) ceramics with compositions close to the morphotropic phase boundary quasibinary diagram and are still under debate. A combination ex situ in transmission electron microscopy high resolution x-ray diffraction revealed that extrinsic effect PZT is closely connected existence nanodomains. investigations applied electric field show mainly nanodomains respond while microdomain structure does not change noticeably our experiments.
The FEI Titan G2 80-200 CREWLEY is a fourth generation transmission electron microscope which has been specifically designed for the investigation of wide range solid state phenomena taking place on atomic scale both structure and chemical composition. For these purposes, equipped with Schottky type high-brightness gun (FEI X-FEG), Cs probe corrector (CEOS DCOR), an in-column Super-X energy dispersive X-ray spectros-copy (EDX) unit (ChemiSTEM technology), post-column filter system (Gatan...
Abstract Dendrite formation and growth remains a major obstacle toward high‐performance all solid‐state batteries using Li metal anodes. The ceramic (1+ x ) Al ( Ti (2− (PO 4 3 (LATP) electrolyte shows higher than expected stability against electrochemical decomposition despite bulk electronic conductivity that exceeds recently postulated threshold for dendrite‐free operation. Here, transmission electron microscopy, atom probe tomography, first‐principles based simulations are combined to...
High interfacial resistance between solid electrolyte and electrode of ceramic all-solid-state batteries is a major reason for the reduced performance these batteries. A solid-state battery using monolithic all-phosphate concept based on screen printed thick LiTi2(PO4)3 anode Li3V2(PO4)3 cathode composite layers densely sintered Li1.3Al0.3Ti1.7(PO4)3 has been realized with competitive cycling performance. The choice materials was primarily (electro-)chemical mechanical matching components...
A ceramic solid-state electrolyte of lithium aluminum titanium phosphate with the composition Li[Formula: see text]Al[Formula: text]Ti[Formula: text](PO[Formula: text] (LATP) was synthesized by a sol–gel method using pre-dissolved Ti-source. The annealed LATP powders were subsequently processed in binder-free dry forming and sintered under air for pellet preparation. Phase purity, density, microstructure as well ionic conductivity specimen characterized. highest density (2.77[Formula:...
Differential phase contrast (DPC) imaging in the scanning transmission electron microscope is applied to study of a charged antiphase domain boundary doped bismuth ferrite. A clear differential signal seen, which matches expected direction electric field at boundary. However, further by scanned diffraction reveals that there no measurable deflection primary disc and hence significant free E-field material. Instead, DPC arises from modulation intensity profile within vicinity Simulations are...
Cathode structures derived from carbonized electrospun polyacrylonitrile (PAN) nanofibers are a current line of development for improvement gas diffusion electrodes metal-air batteries and fuel cells. Diameter, surface morphology, carbon structure chemical composition the based fibers play crucial role functionality resulting cathodes, especially with respect to oxygen adsorption properties, electrolyte wetting electronic conductivity. These functionalities strongly influenced by...
Abstract An exact understanding of the conductivity individual fibers and their networks is crucial to tailor overall macroscopic properties polyacrylonitrile (PAN)‐based carbon nanofibers (CNFs). Therefore, microelectrical CNF nanoelectrical CNFs, carbonized at temperatures from 600 1000 °C, are studied by means conductive atomic force microscopy (C‐AFM). At microscale, show good electrical interconnections enabling a homogeneously distributed current flow. The network's homogeneity...
The formation of the porous structure in dc magnetron sputtered amorphous silicon thin films at low temperatures is studied when using helium and/or argon as processing gas. In each case, a-Si were simultaneously grown two different locations reactor which led to assembly structures. set four fabricated samples has been analyzed microstructural level elucidate characteristics under deposition conditions. With help a growth model, we conclude that chemical nature sputter gas not only affects...
Abstract Lithium aluminum titanium phosphate (LATP) is one of the materials under consideration as an electrolyte in future all-solid-state lithium-ion batteries. In ceramic processing, presence secondary phases and porosity play important role. a more than phase pores, image analysis must tackle difficulties about distinguishing between these microstructural features. this study, we study evolution LATP ceramics sintered at temperatures 950 1100 °C by segmentation based on energy-dispersive...
Li 6.4 Ga 0.2 La 3 Zr 2 O 12 can be reduced by Li, which results in leaching out of the garnet structure to form Li–Ga alloy. The penetrated alloy short-circuit battery when Ga-substituted LLZO is used as a solid electrolyte.
Applications ranging from microphones to AFM transducers exploit the interplay between mechanical stress and electric field arising structural transitions in certain perovskite oxides. The classic material contains lead, however, efficient, environmentally friendly alternatives have long been sought. authors use a challenging technique visualize real-time microstructural evolution of lead-free ferroelectric system, multidomain states they find are expected inform search for additional...
A broad interest has been showed recently on the study of nanostructuring thin films and surfaces obtained by low-energy He plasma treatments incorporation via magnetron sputtering. In this paper spatially resolved electron energy-loss spectroscopy in a scanning transmission microscope is used to locate characterize state nanoporous amorphous silicon coatings deposited dedicated MATLAB program was developed quantify helium density inside individual pores based energy position shift or peak...
Abstract Li 7 La 3 Zr 2 O 12 (LLZO)‐based all‐solid‐state batteries (SSLBs) are very attractive next‐generation energy storage devices owing to their potential for achieving enhanced safety and improved density. However, the rigid nature of ceramics challenges SSLB fabrication afterward interfacial stability during electrochemical cycling. Here, a promising LLZO‐based with high areal capacity stable cycle performance over 100 cycles is demonstrated. In operando transmission electron...
The up-to-date lifespan of zero-excess lithium (Li) metal batteries is limited to a few dozen cycles due irreversible Li-ion loss caused by interfacial reactions during cycling. Herein, chemical prelithiated composite interlayer, made lithiophilic silver (Ag) and lithiophobic copper (Cu) in 3D porous carbon fiber matrix, applied on planar Cu current collector regulate Li plating stripping prevent undesired reactions. Li-rich surface coating oxide (Li2O), carboxylate (RCO2Li), carbonates...
A new approach is presented to produce amorphous porous silicon coatings (a-pSi) with closed porosity by magnetron sputtering of a target. It shown how the use He as process gas at moderated power (50–150 W RF) promotes formation nanometric pores during growth films. The oblique-angle deposition demonstrates possibility aligning and orientating in one direction. control allows pore size distribution. films have been characterized variety techniques, including scanning transmission electron...
Correlative microscopy has been used to investigate the relationship between Li-ion conductivity and microstructure of lithium aluminum titanium phosphate (Li1.3Al0.3Ti1.7(PO4)3, LATP) with high spatial resolution. A key improvement solid state electrolytes such as LATP is a better understanding interfacial ion transport properties on relevant length scales in nanometer micrometer range. Using common techniques, electrochemical impedance spectroscopy, only global information can be obtained....
Nitrogen-doped carbon fibres derived from electrospun poly-acrylonitrile display an optimum catalytic activity towards the oxygen reduction reaction in aqueous-alkaline metal–air batteries, when carbonised under argon at 850 °C.
Abstract Nanocrystalline LiTi 2 (PO 4 ) 3 /C has been synthesized by employing a solvothermal process in which oxalic acid was used as solubilizer for the titanium source, surfactant, and carbon source. Additionally, Pechini's sol–gel‐based method also synthesis comparison. prepared using route showed homogenous particle size with spindle‐like microstructures formed from self‐assembled nanosized‐platelets, whereas preparation sol–gel resulted agglomerated powders irregular morphology size....