A5027682234- Advanced Battery Materials and Technologies
- ZnO doping and properties
- Ionic liquids properties and applications
- Advancements in Battery Materials
- Advanced battery technologies research
- TiO2 Photocatalysis and Solar Cells
- Advanced Photocatalysis Techniques
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Nanowire Synthesis and Applications
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
- Thermodynamic properties of mixtures
- Supercapacitor Materials and Fabrication
- Molecular Junctions and Nanostructures
- Magnesium Alloys: Properties and Applications
- Transition Metal Oxide Nanomaterials
- Gas Sensing Nanomaterials and Sensors
- Advanced Battery Technologies Research
- Layered Double Hydroxides Synthesis and Applications
- Polyoxometalates: Synthesis and Applications
- Anodic Oxide Films and Nanostructures
- Hydrogen Storage and Materials
- solar cell performance optimization
Centre for Electrochemical Technologies
2011-2023
Cidete (Spain)
2017-2018
Emerging energy storage systems based on abundant and cost-effective materials are key to overcome the global climate crisis of 21st century.
Further development of quantum dot-sensitized solar cells (QDSCs) will require long-term stability in addition to the continuous increase photovoltaic (PV) conversion efficiency achieved last years. We report a robust S(2-)/S(n)(2-) electrolyte that has been specifically designed for compatibility with CdSe dots sensitized cells. The new pyrrolidinium ionic liquid reaches 1.86% and short-circuit current close 14 mA·cm(-2) under air-mass 1.5 global illumination improves device lifetime good...
The Na–O2 battery offers an interesting alternative to the Li–O2 battery, which is still source of a number unsolved scientific questions. In spite both being alkali metal–O2 batteries, they display significant differences. For instance, batteries form Li2O2 as discharge product at cathode, whereas usually NaO2. A very important question that affects performance cell concerns key parameters governing growth mechanism large NaO2 cubes formed upon reduction, are requirement viable capacities...
The photovoltaic properties of nanostructured ZnO films sensitized with the indoline derivative dye D149 were studied. performance dye-sensitized solar cells built from building blocks different morphology, (a) randomly oriented nanoparticle network and (b) nanowire arrays, was compared. networks prepared by standard doctor blade technique commercial powders arrays electrodeposited in aqueous media. Two lengths for (2.5 5 µm) considered. characterization included electron microscopy,...
In recent decades, rechargeable Mg batteries (RMBs) technologies have attracted much attention because the use of thin foil anodes may enable development high-energy-density batteries. One most critical challenges for RMBs is finding suitable electrolyte solutions that efficient and reversible cells operation. Most RMB studies concentrate on novel systems, while only few focused practical feasibility using pure metallic as anode material. Pure metal been demonstrated to be useful in studying...
Extremely thin absorber (eta)-solar cells based on ZnO nanowires sensitized with a layer of CdSe have been prepared, using CuSCN as hole transporting material. Samples significantly different photovoltaic performance analyzed and general model their behavior was obtained. We used impedance spectroscopy to the device discriminating series resistance, role conducting material CuSCN, interface process. Correlating analysis microstructural properties solar cell interfaces, good description is...
A multistep wet-chemistry route was developed, by combining electrodeposition, colloidal synthesis and spin coating, to obtain arrays of ZnO nanowires (NWs) coated a nanocrystalline layer (i.e., ZnO/ZnO core–shell NWs). They were integrated as anodes in dye-sensitized solar cells. With the use an iodide-based electrolyte, photovoltages impressive 870 mV obtained with enhancement more than 250 respect devices based on bare NWs. comprehensive device characterization study means impedance...
Abstract Metal–air batteries are intensively studied because of their high theoretical energy‐storage capability. However, the fundamental science electrodes, electrolytes, and reaction products still needs to be better understood. In this work, ionic liquid N ‐butyl‐ ‐methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PYR14TFSI) was chosen study influence a wide range metal cations (M n + ) on electrochemical behavior oxygen. The relevance theory Lewis hard soft acids bases predict...
Abstract The Na–air battery, because of its high energy density and low charging overpotential, is a promising candidate for low‐cost storage, hence leading to intensive research. However, achieve such the role positive electrode material in discharge process must be understood. This issue herein addressed by exploring electrochemical reduction oxygen, as well chemical formation precipitation NaO 2 using different electrodes. Whereas minor influence surface demonstrated on , strong...
This work reports on the development of CdTe thin film solar cells grown ZnO nanowire arrays. The focus was placed utilising arrays as a replacement to conventional buffer layer, thereby requiring minimal alteration existing cell structure. Incorporation nanowires found alter subsequent growth and processing, with dimensions changing device performance significantly. Shorter, ~100 nm, wires were produce particularly low <0.5% whilst longer in range 250–2000 nm able more functional cells....
1-Dimensional nanostructured ZnO electrodes have been demonstrated to be potentially interesting for their application in solar cells. Herein, we present a novel procedure control the nanowire optoelectronic properties by means of surface modification. The is functionalized with nanoparticles order provide an improved contact photoactive P3HT:PCBM film that enhances overall power conversion efficiency resulting cell. Charge extraction and transient photovoltage measurements used successfully...
The influence of the Zn2+ concentration and temperature on electrochemical reduction O2 in a solution zinc bis(trifluoromethanesulfonyl)imide (Zn(TFSI)2) salt 1-butyl-1-methylpyrrolidinium (PYR14TFSI) ionic liquid is presented. ZnO nanocrystalline films were then electrodeposited, under enhanced O2reduction, at temperatures 75–150 °C range. Their morphology, chemical composition, structural optical properties analyzed. In contrast to polar-oriented usually obtained from aqueous conventional...
An innovative ionic liquid (IL)-based synthesis route was developed to obtain ZnO-based hybrid nanostructured films with a modified surface. In particular, ZnO–IL films, thickness from 1.5 4.5 μm and an appealing sponge-like morphology, were obtained the electrochemical reduction of NO3− in liquid-based electrolytes containing Zn2+. The presence moieties and/or derivatives as-deposited demonstrated by Fourier transform infra-red spectroscopy energy dispersive X-ray spectroscopy. However,...
Abstract Among many other applications, room‐temperature ionic liquids (ILs) are used as electrolytes for storage and energy‐conversion devices. In this work, we investigate, at the microscopic level, structural dynamical properties of 1‐methyl‐1‐butyl‐pyrrolidinium bis(trifluoromethanesulfonyl) imide [C 4 PYR] + [Tf 2 N] − IL‐based metal‐ion batteries. We carried out molecular dynamics simulations mainly composed IL with addition M n+ ‐[Tf metal salts (M=Li , Na Ni 2+ Zn Co Cd Al 3+ n=1, 2,...
Lithium-sulfur (Li-S) batteries are the most promising candidates for succeeding lithium ion batteries. However, they present some challenges which should be faced to increase its commercial possibilities as detrimental mechanisms during operation (e.g. shuttle effect, low capacity retention, anode corrosion, and so on) sulfur cathode processing limitations poor mechanical stability of S cathodes, defects, loading, on). Atomic layer deposition (ALD) with alumina (Al2O3) has been extensively...
The high capacity of sulfur makes lithium–sulfur (Li–S) batteries the most promising next‐generation battery systems. With a significantly higher theoretical specific energy than conventional lithium‐ion batteries, this technology is intensely investigated. However, currently used cathodes have some critical drawbacks which affect performance Li–S batteries. Atomic layer deposition (ALD) demonstrates its power for solving emerging issues in energy‐storage application alumina (Al 2 O 3 ) to...