A5023718505- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Extraction and Separation Processes
- Luminescence Properties of Advanced Materials
- Supercapacitor Materials and Fabrication
- Inorganic Chemistry and Materials
- Thermal Expansion and Ionic Conductivity
- Organometallic Complex Synthesis and Catalysis
- Microstructure and mechanical properties
- Advanced Surface Polishing Techniques
- Semiconductor materials and devices
- Glass properties and applications
- Advanced MEMS and NEMS Technologies
- Semiconductor materials and interfaces
- Synthesis and characterization of novel inorganic/organometallic compounds
- Chemical Synthesis and Characterization
- Transition Metal Oxide Nanomaterials
- Numerical methods in engineering
- Recycling and Waste Management Techniques
- Ferroelectric and Piezoelectric Materials
- Force Microscopy Techniques and Applications
- Microstructure and Mechanical Properties of Steels
CIC energiGUNE
2016-2025
Université Libre de Bruxelles
2012-2016
Parque Tecnológico de la Salud
2014-2016
Universitat Rovira i Virgili
2006-2013
Instituto de Ciencia de Materiales de Madrid
2009
Consejo Superior de Investigaciones Científicas
2009
University of Tübingen
2004-2005
Solid polymer electrolytes (SPEs) have emerged as promising candidates for sodium-based batteries due to their cost-effectiveness and excellent flexibility. However, achieving high ionic conductivity desirable mechanical properties in SPEs remains a challenge. In this study, we investigated an AB diblock copolymer, PS–PEA(BuImTFSI), potential SPE sodium batteries. We explored binary ternary electrolyte systems by combining the with salt [C3mpyr][FSI] liquid (IL) analyzed thermal...
Phase transitions occurring during the (de)intercalation of Na in Na<sub>2/3</sub>[Fe<sub>1/2</sub>Mn<sub>1/2</sub>]O<sub>2</sub> have been examined by using <italic>in situ</italic> XRD and Raman Spectroscopy along with <italic>ex NMR.
Abstract Cobalt‐ and nickel‐free cathode materials are desirable for developing low‐cost sodium‐ion batteries (SIBs). Compared to the single P‐type O‐type structures, biphasic P/O structures become a topic of interest thanks improved performance. However, added complexity complicates understanding storage mechanism phase behavior is still unclear, especially over consecutive cycling. Here, properties P2(34%)/O3(60%) Na 0.8 Li 0.2 Fe Mn 0.6 O 2 its at different states charge/discharge...
Insight into the mechanism of Na insertion and extraction FePO<sub>4</sub>–NaFePO<sub>4</sub> based on a detailed <italic>in situ</italic> X-ray diffraction study, from which interesting new features were identified analysed.
In this work, a new bulk Li3.6PO3.4N0.6 crystalline polymorph has been prepared from low-cost precursors, following simple ball-milling procedure. The densified powder exhibits conductivity of 5.0 × 10–6 S cm–1 at 70 °C and an electrochemical stability allowing operation with high-voltage materials up to V vs Li/Li+. Stripping plating lithium in symmetric cell demonstrates the forthcoming application LiPON devices. Widening use phosphorus oxynitride compositions solid-state batteries will...
Abstract Modern batteries are highly complex devices. The cells contain many components—which in turn all have variations, both terms of chemistry and physical properties. A few examples: the active materials making electrodes coated on current collectors using solvents, binders additives; multicomponent electrolyte, contains salts, electrolyte can also be a solid ceramic, polymer or glass material; separator, which made fibres, polymeric, composite, etc. Moving up scale these components...
NaFePO4 is known as a promising intercalation cathode material for sodium-ion batteries. During the electrochemical reaction, an intermediate phase forms with composition close to Na≈2/3FePO4, whose crystal structure defined supercell that results from both Na/vacancy and charge ordering. In this work, we present detailed study of superstructure through synchrotron powder X-ray diffraction electron microscopy studies.
Triphylite-NaFePO4 attracts considerable attention as a cathode material for sodium-ion batteries due to its theoretical capacity (154 mAh/g), sharing also the excellent properties of analogous triphylite-LiFePO4 used in commercial lithium-ion batteries. In this work, triphylite-NaFePO4 is synthesized from by low-cost, eco-friendly method, enabling recovery and subsequent reuse lithium. NaFePO4 was evaluated half-cells, exhibiting an initial discharge 132 mAh/g good retention (115 ∼100%...
A molecular level investigation of sodium insertion–extraction in olivine Na<sub>x</sub>FePO<sub>4</sub> as a promising cathode material for sodium-ion batteries.
Herein, we report for the first time use of TiSb2 alloy as anode material sodium-ion batteries (NIBs) and capacitors (NICs). The electrochemical performance in NIBs shows stable cycling with a capacity about 225 mAh·g–1 200 cycles. Discrepancies expected theoretical specific charge are discussed by means operando XRD ex situ TEM analysis. excellent rate capability enables NICs, achieving promising high energy densities 132 Wh·kg–1 at 114 W·kg–1 65 11 kW·kg–1, which among best reported values...
The structure and magnetic properties of P2-Na 2/3 Fe Mn 1/3 O 2 is resolved using operando diffraction complimentary techniques, revealing how structural changes during (de-)sodiation differ with applied current density contribute to capacity fading.
In-situ bright field transmission electron microscopy (TEM) nanomechanical tensile testing and in-situ automated crystallographic orientation mapping in TEM were combined to unravel the elementary mechanisms controlling plasticity of ultrafine grained Aluminum freestanding thin films. The characterizations demonstrate that deformation proceeds with a transition from grain rotation intragranular dislocation glide starvation mechanism at about 1% deformation. is not affected by character...
When electrode materials are driven away from equilibrium conditions, significant differences occur in their (dis)charge mechanism. In this paper, the changes phase transformations of olivine NaFePO4 examined as a function cycling rate thorough analyses both voltage-composition profiles galvanostatic cycling, and operando laboratory synchrotron X-ray diffraction experiments. While charge mechanism remains unchanged at all C-rates, high rates enable to unveil 2 concomitant biphasic reactions...
Abstract Co‐intercalation using ether‐based electrolytes renders graphite as a promising anode material in sodium‐ion batteries (SIBs). While most research on electrochemical solvent co‐intercalation has focused linear ethers such mono‐, di‐, tri‐, tetra‐, and penta‐glyme, we herein investigate the possibility of reversible with alternative solvents, especially cyclic tetrahydrofuran (THF) 1,3‐dioxolane (DOL), which show no signs their own. We demonstrate, however, that this reaction becomes...
Prussian White (PW) is a strategic cathode material for sodium-ion batteries, offering high theoretical capacity and voltage. However, the crystalline structure electrochemical performance of PW strongly depend on hydration level, which difficult to control, leading discrepancies in results interpretations presented literature. This work aims provide deeper insight into dehydration process materials better understanding impact their fast rehydration, upon exposure moisture, characterization....
A simple method to prepare a mechanically robust ionogel film by fast (<1 min) UV photopolymerization of poly(ethylene glycol) diacrylate in the presence an ionic liquid electrolyte based on N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide and sodium is demonstrated. The ionogels showed very high conductivity at 50 °C (6.5 × 10–3 S·cm–1) close counterpart (7.8 S·cm–1). High salt concentration was beneficial for plating stripping. Na/ionogel/NaFePO4 full cells delivered specific...
Mn-substitution in triphylite NaFe1-yMnyPO4 is here explored with the aim to enhance electrochemical performance of NaFePO4. Our results show that, similarly LiFe1-yMnyPO4 system, increasing Mn-content raises average discharge voltage but this comes at expense limiting capacity. However, y = 0.2 identified as an optimal composition terms energy density and efficiency Fe2+/Fe3+ reaction. The reaction mechanism NaxFe0.8Mn0.2PO4, studied from operando XRD experiments, involves two intermediate...
Transition metal (TM) layered oxides constitute a promising family of materials for use in Na-ion battery cathodes. Here O3-Na (Ni 1/3 Mn Fe ) O 2 was synthesised using optimised sol-gel and solid-state routes, the physico- electrochemical natures resulting were thoroughly studied. Significant differences behaviour observed, operando XRD determined this stemmed from suppression P3 phase material during cycling. This attributable to degree transition migration ensuing selection synthetic...