A5007241502- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Advanced battery technologies research
- Electrochemical Analysis and Applications
- Graphene research and applications
- Advanced Battery Technologies Research
- Conducting polymers and applications
- Electrochemical sensors and biosensors
- Analytical Chemistry and Sensors
- Advanced Photocatalysis Techniques
- Molecular Junctions and Nanostructures
- Carbon Nanotubes in Composites
- Catalytic Processes in Materials Science
- TiO2 Photocatalysis and Solar Cells
- X-ray Diffraction in Crystallography
- Membrane-based Ion Separation Techniques
- Fiber-reinforced polymer composites
- Advanced Memory and Neural Computing
- Crystallization and Solubility Studies
- Electromagnetic wave absorption materials
- Advanced Nanomaterials in Catalysis
- Thermal properties of materials
University of Ljubljana
2016-2025
National Institute of Chemistry
2003-2022
Graz University of Technology
2022
University of Maribor
2022
Argonne National Laboratory
2011-2019
Active monomers: Grafting soluble organic molecules onto insoluble, high-surface-area substrates, e.g. calixquinones on nanoparticles (see pciture), allows the production of a wide range very stable materials for lithium-ion battery applications. Immobilization avoids problem dissolution, which has previously led to performance degradation.
Developing a new generation of battery chemistries is critical challenge to moving beyond current Li-ion technologies. In this work, we introduce surface-science-based approach for understanding the complex phenomena controlling reversibility Mg anodes Mg-ion batteries. We identify profound impact trace levels H2O (≤3 ppm) on kinetics deposition and determine that passive films MgO Mg(OH)2 are formed only after ceases, rather than continuously during reduction. also find Cl– inhibits...
Abstract Mg batteries are a promising battery technology that could lead to safer and significantly less expensive non‐aqueous with energy densities comparable or even better than state‐of‐the‐art Li‐ion batteries. Although the first prototype using stable Mo 6 S 8 as cathode was introduced over fifteen years ago, major challenges remain be solved. In particular, design of high materials development non‐corrosive electrolytes oxidative stability issues need tackled. Herein, we present new,...
A thermoplastic polyurethane (TPU) composite film containing hexadecyl-functionalized low-defect graphene nanoribbons (HD-GNRs) was produced by solution casting. The HD-GNRs were well distributed within the matrix, leading to phase separation of TPU. Nitrogen gas effective diffusivity TPU decreased 3 orders magnitude with only 0.5 wt % HD-GNRs. incorporation also improved mechanical properties films, as predicted and indicated tensile tests dynamic analyses. could lead potential applications...
A conductive composite of graphene nanoribbon (GNR) stacks and epoxy is fabricated. The filled with the GNR stacks, which serve as a additive. are on average 30 nm thick, 250 wide, μm long. GNR-filled exhibits conductivity >100 S/m at 5 wt % content. This permits application GNR-epoxy for deicing surfaces through Joule (voltage-induced) heating generated by voltage across composite. power density 0.5 W/cm(2) was delivered to remove ∼1 cm-thick (14 g) monolith ice from static helicopter rotor...
We report on the synthesis of fluorinated reduced graphene oxide (F-rGO) by a direct fluorination (rGO) with F2 or XeF2/BF3 in anhydrous HF. Characterization performed high-angle annular dark-field (HAADF)-scanning transmission electron microscopy (STEM) and NMR confirmed formation C–F bonds, which is also supported color change from graphite gray to light yellow. F-rGO has been used as an interlayer additive glass fiber separator lithium–sulfur (Li–S) batteries order block...
Graphene oxide nanoribbons (GONRs) and chemically reduced graphene (crGNRs) were dispersed at high concentrations in chlorosulfonic acid to form anisotropic liquid crystal phases. The solutions spun directly into hundreds of meters continuous macroscopic fibers. relationship fiber morphology coagulation bath conditions was studied. effects colloid concentration, annealing temperature, spinning air gap, pretension during on the fibers' performance also investigated. Heat treatment as-spun...
A cost-effective and potentially industrially scalable, in situ functionalization procedure for preparation of soluble graphene nanoribbon (GNRs) from commercially available carbon nanotubes is presented. The physical characteristics the functionalized product were determined using SEM, evolved gas analysis, X-ray diffraction, solid-state 13C NMR, Raman spectroscopy, GC–MS analytical techniques. relatively high preservation electrical properties bulk material was observed. Moreover,...
Water and oxygen electrochemistry lies at the heart of interfacial processes controlling energy transformations in fuel cells, electrolyzers, batteries. Here, by comparing results for ORR obtained alkaline aqueous media to those ultradry organic electrolytes with known amounts H2O added intentionally, we propose a new rationale which water itself plays an important role determining reaction kinetics. This effect derives from formation HOad···H2O (aqueous solutions) LiO2···H2O (organic...
Hybrid supercapacitors that follow a "rocking-chair"-type mechanism were developed by coupling divalent metal and activated carbon electrodes in nonaqueous electrolytes. Conventional require large amount of electrolyte to provide sufficient quantity ions the electrodes, due their Daniell-type depletes from while charging. The alternative effectively enhances energy density minimizing necessary electrolyte, because ion is replenished anode it adsorbed cathode. Newly electrolytes for Mg Zn...
Compared to aqueous electrolytes, fundamental understanding of the chemical and electrochemical processes occurring in non-aqueous electrolytes is far less developed. This no different for Li-ion battery (LiB) where many questions regarding solid-electrolyte interphase (SEI) on anode side remain unanswered, including its composition, mechanism formation, impact LiB performance. Here, we present a detailed experimental theoretical study electrochemistry ethylene carbonate (EC) relationship...
Big and small: Chemically modifying platinum with calix[4]arene yields a highly stable anode catalyst that effectively suppresses the oxidation reduction reaction without altering maximum activity for hydrogen (see picture, Pt blue, C gray, O red, S yellow). This behavior extends from long-range-ordered stepped single-crystal surfaces to nanocatalysts. Detailed facts of importance specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited...
Abstract We demonstrate the importance of effective separation between sulfur cathode and lithium anode in Li–S batteries. Improved cycling stability is obtained by using fluoro‐functionalized reduced graphene oxide (rGO) as a separator anode. The thickness hydrophobic interlayer found to be 1–2 μm. possible mechanism checked with analytical techniques suggests that improvement capacity can attributed reactivity long‐chain polysulfides metallic homogenous distribution end‐discharge products...
Metallic lithium is considered to be one of the most promising anode materials since it offers high volumetric and gravimetric energy densities when combined with high-voltage or high-capacity cathodes. However, main impediment practical applications metallic its unstable solid electrolyte interface (SEI), which results in constant consumption for formation fresh SEI, together dendritic growth during electrochemical cycling. Here we present performance a fluorinated reduced graphene oxide...
The lack of efficient and durable proton exchange membrane fuel cell electrocatalysts for the oxygen reduction reaction is still restraining present hydrogen technology. Graphene-based carbon materials have emerged as a potential solution to replace existing black (CB) supports; however, their was never fully exploited commercial because more demanding properties. Here, unique industrially scalable synthesis platinum-based on graphene derivative (GD) supports presented. With an innovative...
Deicing heating layers are frequently used in covers of large radio-frequency (RF) equipment, such as radar, to remove ice that could damage the structures or make them unstable. Typically, deicers made using a metal framework and inorganic insulator; commercial resistive materials often nontransparent RF waves. The preparation sub-skin-depth thin film, whose thickness is very small relative skin (or penetration) depth, key minimizing absorption. depth typical metals on order micrometer at...
New lightweight, flexible dielectric composite materials were fabricated by the incorporation of several new carbon nanostructures into a host matrix. Both permittivity and loss tangent values resulting composites widely altered varying type content conductive filler. The constant was tuned from moderate to very high values, while corresponding changed ultralow extremely high. data exemplify that nanoscale changes in structure filler result dramatic properties composites. A microcapacitor...
Engineered solid-liquid interfaces will play an important role in the development of future energy storage and conversion (ESC) devices. In present study, defective graphene oxide (GO) reduced (rGO) structures were used as engineered to tune selectivity activity Pt disk electrodes. GO was deposited on electrodes via Langmuir-Blodgett technique, which provided compact uniform films, these films subsequently converted rGO by thermal reduction. Electrochemical measurements revealed that both...
A fast and facile pulse combustion (PC) method that allows for the continuous production of multigram quantities high-metal-loaded highly uniform supported metallic nanoparticles (SMNPs) is presented. Namely, various metal on carbon (M/C) composites have been prepared by using only three feedstock components: water, metal-salt, supporting material. The present approach can be elegantly utilized also numerous other applications in electrocatalysis, heterogeneous catalysis, sensors. In this...