Imperial College London

DrAndreaCavallaro

Faculty of EngineeringDepartment of Materials

Research Associate
 
 
 
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Contact

 

a.cavallaro

 
 
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Location

 

Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

49 results found

Baiutti F, Chiabrera F, Acosta M, Diercks D, Parfitt D, Santiso J, Wang X, Cavallaro A, Morata A, Wang H, Chroneos A, MacManus-Driscoll J, Tarancon Aet al., 2021, A high-entropy manganite in an ordered nanocomposite for long-term application in solid oxide cells, NATURE COMMUNICATIONS, Vol: 12, ISSN: 2041-1723

Journal article

Celikbilek O, Cavallaro A, Kerherve G, Fearn S, Chaix-Pluchery O, Aguadero A, Kilner JA, Skinner SJet al., 2020, Surface restructuring of thin-film electrodes based on thermal history and its significance for the catalytic activity and stability at the gas/solid and solid/solid interfaces, ACS Applied Materials & Interfaces, Vol: 12, Pages: 34388-34401, ISSN: 1944-8244

Electrodes in solid-state energy devices are subjected to a variety of thermal treatments, from film processing to device operation at high temperatures. All these treatments influence the chemical activity and stability of the films, as the thermally induced chemical restructuring shapes the microstructure and the morphology. Here, we investigate the correlation between the oxygen reduction reaction (ORR) activity and thermal history in complex transition metal oxides, in particular, La0.6Sr0.4CoO3−δ (LSC64) thin films deposited by pulsed laser deposition. To this end, three ∼200 nm thick LSC64 films with different processing and thermal histories were studied. A variety of surface-sensitive elemental characterization techniques (i.e., low-energy ion scattering, X-ray photoelectron spectroscopy, and secondary ion mass spectrometry) were employed to thoroughly investigate the cationic distribution from the outermost surface to the film/substrate interface. Moreover, electrochemical impedance spectroscopy was used to study the activity and the stability of the films. Our investigations revealed that, despite the initial comparable ORR activity at 600 °C, the degradation rates of the films differed by twofold in the long-term stability tests at 500 °C. Here, we emphasize the importance of processing and thermal history in the elemental surface distribution, especially for the stability of LSC64 electrodes and propose that they should be considered as among the main pillars in the design of active surfaces.

Journal article

Brugge RH, Pesci FM, Cavallaro A, Sole C, Isaacs MA, Kerherve G, Weatherup RS, Aguadero Aet al., 2020, The origin of chemical inhomogeneity in garnet electrolytes and its impact on the electrochemical performance, Journal of Materials Chemistry A, Vol: 8, Pages: 14265-14276, ISSN: 2050-7488

The interface between solid electrolytes and lithium metal electrodes determines the performance of an all-solid-state battery in terms of the ability to demand high power densities and prevent the formation of lithium dendrites. This interface depends strongly on the nature of the solid electrolyte surface in contact with the metallic anode. In the garnet electrolyte/Li system, most papers have focused on the role of current inhomogeneities induced by void formation in the Li metal electrode and the presence of insulating reaction layers following air exposure. However, extended defects in the solid electrolyte induced by chemical and/or structural inhomogeneities can also lead to uneven current distribution, impacting the performance of these systems. In this work, we use complementary surface analysis techniques with varying analysis depths to probe chemical distribution within grains and grain boundaries at the surface and in the bulk of garnet-type electrolytes to explain their electrochemical performance. We show that morphology, post-treatments and storage conditions can greatly affect the surface chemical distribution of grains and grain boundaries. These properties are important to understand since they will dictate the ionic and electronic transport near the interfacial zone between metal and electrolyte which is key to determining chemo-mechanical stability.

Journal article

Roman Acevedo W, van den Bosch CAM, Aguirre MH, Acha C, Cavallaro A, Ferreyra C, Sanchez MJ, Patrone L, Aguadero A, Rubi Det al., 2020, Large memcapacitance and memristance at Nb:SrTiO3/La0.5Sr0.5Mn0.5Co0.5O3-delta topotactic redox interface (vol 116, 063502, 2020), APPLIED PHYSICS LETTERS, Vol: 116, ISSN: 0003-6951

Journal article

Roman Acevedo W, van den Bosch CAM, Aguirre MH, Acha C, Cavallaro A, Ferreyra C, Sanchez MJ, Patrone L, Aguadero A, Rubi Det al., 2020, Large memcapacitance and memristance at Nb:SrTiO3/La0.5Sr0.5Mn0.5Co0.5O3-delta topotactic redox interface, APPLIED PHYSICS LETTERS, Vol: 116, ISSN: 0003-6951

Journal article

van den Bosch C, Cavallaro A, Moreno R, Cibin G, Kerherve G, Caciedo J, Lippert T, Doebeli M, Santiso J, Skinner S, Aguadero Aet al., 2020, Revealing strain effects on the chemical compositionof Perovskite oxide thin films surface, bulk, and interfaces, Advanced Materials Interfaces, Vol: 7, ISSN: 2196-7350

Understanding the effects of lattice strain on oxygen surface and diffusion kinetics in oxides is a controversial subject that is critical for developing efficient energy storage and conversion materials. In this work, high-quality epitaxial thin films of the model perovskite La0.5Sr0.5Mn0.5Co0.5O3-δ (LSMC), under compressive or tensile strain, were characterized with a combination of in situ and ex situ bulk and surface-sensitive techniques. The results demonstrate a non-linear correlation of mechanical and chemical properties as a function of the operation conditions. It was observed that the effect of strain on reducibility is dependent on the “effective strain” induced on the chemical bonds. In plain strain, and in particular the relative B-O length bond, are the key factor controlling which of the B-site cation would be reduced preferentially. Furthermore, the need to use a set of complimentary techniques to isolate different chemically-induced strain effects was proven. With this, it was confirmed that tensile strain favors the stabilization of a more reduced lattice, accompanied by greater segregation of strontium secondary phases and a decrease of oxygen exchange kinetics on LSMC thin films.

Journal article

Pesci FM, Brugge RH, Hekselman AKO, Cavallaro A, Chater RJ, Aguadero Aet al., 2018, Elucidating the role of dopants in the critical current density for dendrite formation in garnet electrolytes, Journal of Materials Chemistry A, Vol: 6, Pages: 19817-19827, ISSN: 2050-7488

Garnet-type solid electrolytes have attracted great interest in solid state battery research thanks to their high ionic conductivity at room temperature (10−3 S cm−1) and their electrochemical stability against lithium metal anodes. However, the formation of lithium dendrites following charge/discharge limits their applicability and commercialisation. Although widely investigated, no clear explanation of dendrite formation has been previously reported. In this work, we employ cubic Al- and Ga-doped Li7La3Zr2O12, which represent two of the solid electrolytes with higher technological importance, to investigate the formation and chemical composition of dendrites. For the first time, this study elucidates the role that the dopants play in determining the critical current density for dendrite formation and highlights the importance of controlling the dopant distribution in the garnet structure. We use a combination of techniques including Secondary Electron Microscopy and Secondary Ion Mass Spectrometry in order to analyse the microstructure and chemical composition of dendrites in Li7La3Zr2O12. We show that, following electrochemical cycling, Li6.55Ga0.15La3Zr2O12 systematically displays a critical current density 60% higher than Li6.55Al0.15La3Zr2O12. Chemical analysis revealed that in Li6.55Al0.15La3Zr2O12 the dendritic features are composed of a mixture of Al and Li species, whereas in Li6.55Ga0.15La3Zr2O12 they are uniquely composed of Li. We also show that only in pristine Li6.55Al0.15La3Zr2O12, the dopant segregates at the grain boundaries suggesting that local chemical inhomogeneity can have a fundamental role in the nucleation and propagation of dendrites.

Journal article

Brugge R, Hekselman A, Cavallaro A, Pesci F, Chater R, Kilner J, Aguadero Aet al., 2018, Garnet electrolytes for solid state batteries: visualization of moisture-induced chemical degradation and revealing its impact on the Li-ion dynamics, Chemistry of Materials, Vol: 30, Pages: 3704-3713, ISSN: 0897-4756

In this work, we reveal the impact of moisture-induced chemical degradation and proton–lithium exchange on the Li-ion dynamics in the bulk and the grain boundaries and at the interface with lithium metal in highly Li-conducting garnet electrolytes. A direct correlation between chemical changes as measured by depth-resolved secondary ion mass spectrometry and the change in transport properties of the electrolyte is provided. In order to probe the intrinsic effect of the exchange on the lithium kinetics within the garnet structure, isolated from secondary corrosion product contributions, controlled-atmosphere processing was first used to produce proton-free Li6.55Ga0.15La3Zr2O12 (Ga0.15-LLZO), followed by degradation steps in a H2O bath at 100 °C, leading to the removal of LiOH secondary phases at the surface. The proton-exchanged region was analyzed by focused ion beam secondary ion mass spectrometry (FIB-SIMS) and found to extend as far as 1.35 μm into the Ga0.15-LLZO garnet pellet after 30 min in H2O. Impedance analysis in symmetrical cells with Li metal electrodes indicated a greater reactivity in grain boundaries than in grains and a significantly detrimental effect on the Li transfer kinetics in the Li metal/garnet interface correlated to a 3-fold decrease in the Li mobility in the protonated garnet. This result indicates that the deterioration of Li charge transfer and diffusion kinetics in proton-containing garnet electrolytes have fundamental implications for the optimization and integration of these systems in commercial battery devices.

Journal article

Cavallaro A, Pramana S, Ruiz Trejo E, Sherrell P, Ware E, Kilner J, Skinner SJet al., 2018, Amorphous-cathode-route towards low temperature SOFC, Sustainable Energy & Fuels, Vol: 2, Pages: 862-875, ISSN: 2398-4902

Lowering the operating temperature of solid oxide fuel cell (SOFC) devices is one of the major challenges limiting the industrial breakthrough of this technology. In this study we explore a novel approach to electrode preparation employing amorphous cathode materials. La0.8Sr0.2CoO3−δ dense films have been deposited at different temperatures using pulsed laser deposition on silicon substrates. Depending on the deposition temperature, textured polycrystalline or amorphous films have been obtained. Isotope exchange depth profiling experiments reveal that the oxygen diffusion coefficient of the amorphous film increased more than four times with respect to the crystalline materials and was accompanied by an increase of the surface exchange coefficient. No differences in the surface chemical composition between amorphous and crystalline samples were observed. Remarkably, even if the electronic conductivities measured by the Van Der Pauw method indicate that the conductivity of the amorphous material was reduced, the overall catalytic properties of the cathode itself were not affected. This finding suggests that the rate limiting step is the oxygen mobility and that the local electronic conductivity in the amorphous cathode surface is enough to preserve its catalytic properties. Different cathode materials have also been tested to prove the more general applicability of the amorphous-cathode route.

Journal article

Skinner SJ, ryan MP, pramana S, cavallaro A, li C, handoko A, Chan KW, walker RJ, Regoutz A, herrin J, Yeo BS, Payne DJ, kilner JAet al., 2017, Crystal structure and surface characteristics of Sr-doped GdBaCo2O6-δ double perovskites: oxygen evolution reaction and conductivity, Journal of Materials Chemistry A, Vol: 6, Pages: 5335-5345, ISSN: 2050-7496

A cheap and direct solution towards engineering better catalysts through identification of novel materials is required for a sustainable energy system. Perovskite oxides have emerged as potential candidates to replace the less economically attractive Pt and IrO2 water splitting catalysts. In this work, excellent electrical conductivity (980 S cm−1) was found for the double perovskite of composition GdBa0.6Sr0.4Co2O6−δ which is consistent with a better oxygen evolution reaction activity with the onset polarisation of 1.51 V with respect to a reversible hydrogen electrode (RHE). GdBa1−xSrxCo2O6−δ with increasing Sr content was found to crystallise in the higher symmetry tetragonal P4/mmm space group in comparison with the undoped GdBaCo2O6−δ which is orthorhombic (Pmmm), and yields higher oxygen uptake, accompanied by higher Co oxidation states. This outstanding electrochemical performance is explained by the wider carrier bandwidth, which is a function of Co–O–Co buckling angles and Co–O bond lengths. Furthermore the higher oxygen evolution activity was observed despite the formation of non-lattice oxides (mainly hydroxide species) and enrichment of alkaline earth ions on the surface.

Journal article

Skinner SJ, McComb DW, Harrington GF, Cavallaro A, Kilner JAet al., 2017, The effects of lattice strain, dislocations, and microstructure on the transport properties of YSZ films, Physical Chemistry Chemical Physics, Vol: 19, Pages: 14319-14336, ISSN: 1463-9084

Enhanced conductivity in YSZ films has been of substantial interest over the last decade. In this paper we examine the effects of substrate lattice mismatch and film thickness on the strain in YSZ films and the resultant effect on the conductivity. 8 mol% YSZ films have been grown on MgO, Al2O3, LAO and NGO substrates, thereby controlling the lattice mismatch at the film/substrate interface. The thickness of the films was varied to probe the interfacial contribution to the transport properties, as measured by impedance spectroscopy and tracer diffusion. No enhancement in the transport properties of any of the films was found over single crystal values, and instead the effects of lattice strain were found to be minimal. The interfaces of all films were more resistive due to a heterogeneous distribution of grain boundaries, and no evidence for enhanced transport down dislocations was found.

Journal article

Martin J, Iturrospe A, Cavallaro A, Arbe A, Stingelin N, Ezquerra TA, Mijangos C, Nogales Aet al., 2017, Relaxations and relaxor-ferroelectric-like response of nanotubularly confined poly(vinylidene fluoride), Chemistry of Materials, Vol: 29, Pages: 3515-3525, ISSN: 1520-5002

Herein, we elucidate the impact of tubular confinement on the structure and relaxation behavior of poly(vinylidene difluoride) (PVDF) and how these affect the para-/ferroelectric behavior of this polymer. We use PVDF nanotubes that were solidified in anodic aluminum oxide (AAO) templates. Dielectric spectroscopy measurements evidence a bimodal relaxation process for PVDF nanotubes: besides the bulk-like α-relaxation, we detect a notably slower relaxation that is associated with the PVDF regions of restricted dynamics at the interface with the AAO pore. Strikingly, both the bulk-like and the interfacial relaxation tend to become temperature independent as the temperature increases, a behavior that has been observed before in inorganic relaxor ferroelectrics. In line with this, we observe that the real part of the dielectric permittivity of the PVDF nanotubes exhibits a broad maximum when plotted against the temperature, which is, again, a typical feature of relaxor ferroelectrics. As such, we propose that, in nanotubular PVDF, ferroelectric-like nanodomains are formed in the amorphous phase regions adjacent to the AAO interface. These ferroelectric nanodomains may result from an anisotropic chain conformation and a preferred orientation of local dipoles due to selective H-bond formation between the PVDF macromolecues and the AAO walls. Such relaxor-ferroelectric-like behavior has not been observed for nonirradiated PVDF homopolymer; our findings thus may enable in the future alternative applications for this bulk commodity plastic, e.g., for the production of electrocaloric devices for solid-state refrigeration which benefit from a relaxor-ferroelectric-like response.

Journal article

Pramana SS, Cavallaro A, Qi J, Nicklin CL, Ryan MP, Skinner SJet al., 2017, Understanding surface structure and chemistry of single crystal lanthanum aluminate, Scientific Reports, Vol: 7, ISSN: 2045-2322

The surface crystallography and chemistry of a LaAlO3 single crystal, a material mainly used as a substrate to deposit technologically important thin films (e.g. for superconducting and magnetic devices), was analysed using surface X-ray diffraction and low energy ion scattering spectroscopy. The surface was determined to be terminated by Al-O species, and was significantly different from the idealised bulk structure. Termination reversal was not observed at higher temperature (600°C) and chamber pressure of 10-10 Torr, but rather an increased Al-O occupancy occurred, which was accompanied by a larger outwards relaxation of Al from the bulk positions. Changing the oxygen pressure to 10-6 Torr enriched the Al site occupancy fraction at the outermost surface from 0.245(10) to 0.325(9). In contrast the LaO, which is located at the next sub-surface atomic layer, showed no chemical enrichment and the structural relaxation was lower than for the top AlO2 layer. Knowledge of the surface structure will aid the understanding of how and which type of interface will be formed when LaAlO3 is used as a substrate as a function of temperature and pressure, and so lead to improved design of device structures.

Journal article

Chater RJ, Cavallaro A, Bayliss RD, Cook SN, Esser BD, McComb DW, Kilner JAet al., 2016, Fast grain boundary oxygen ion diffusion in the α-phase of Bi2O3, Solid State Ionics, Vol: 299, Pages: 89-92, ISSN: 0167-2738

The low temperature stable α-phase of pure Bi2O3 is known to have an oxygen ion diffusivity that is over 7 orders of magnitude lower than the high temperature fluorite-structured δ-phase. Tracer oxygen-18 diffusion studies of polycrystalline α-Bi2O3 at 600 °C using an ion microscope with lateral resolutions of ~ 50 nm for the surface distributions of the oxygen isotopes have resolved the secondary fast migration pathways as well as the normal bulk diffusion profile in the grains. A grain boundary pathway for the oxygen migration is distinguished from other extended defects, some of which are also active in the overall oxygen diffusivity. This experimental study highlights the potential manipulation of the micro-structure of this material for enhanced oxygen ion conduction in intermediate temperature solid oxide fuel cells as has been shown for perovskite MIEC electrode materials.

Journal article

Saranya AM, Pla D, Morata A, Cavallaro A, Canalez-Vasquez J, Kilner JA, Burriel M, Tarancon Aet al., 2015, Engineering Mixed Ionic Electronic Conduction in La0.8Sr0.2MnO3+δ Nanostructures through Fast Grain Boundary Oxygen Diffusivity, Advanced Energy Materials, ISSN: 1614-6840

Journal article

Tarancón A, Morata A, Pla D, Saranya AM, Chiabrera F, Garbayo I, Cavallaro A, Canales-Vázquez J, Kilner JA, Burriel Met al., 2015, Grain boundary engineering to improve ionic conduction in thin films for micro-SOFCs, ECS Transactions, Vol: 69, Pages: 11-16, ISSN: 1938-6737

New emerging disciplines are specifically devoted to study trivial and non-trivial effects resulting from working in the nanoscale, however, the implementation of these nanostructures in real devices is still a major challenge. Thin film deposition and silicon microtechnology is probably the most promising and straightforward combination for the reliable integration of nanomaterials in real devices. In particular, the implementation of pure ionic and mixed ionic/electronic conductors (MIECs) in thin film form allows the miniaturization of multiple solid state devices such as solid oxide fuel cells (SOFCs). In this work, we will present the implementation of novel nanoionics concepts in micro-SOFCs by using micro and nanofabrication technologies. We will put special attention on the contribution of grain boundaries to the mass transport properties in interface-dominated materials such as thin films. Grain boundary engineering will be presented as a powerful tool for reducing the resistance associated to electrolytes and even control the intrinsic transport nature and performance of MIEC materials.

Journal article

Cavallaro A, Harrington GF, Skinner SJ, Kilner JAet al., 2014, Controlling the surface termination of NdGaO3 (110): the role of the gas atmosphere, NANOSCALE, Vol: 6, Pages: 7263-7273, ISSN: 2040-3364

Journal article

Reinle-Schmitt ML, Cancellieri C, Cavallaro A, Harrington GF, Leake SJ, Pomjakushina E, Kilner JA, Willmott PRet al., 2014, Chemistry and structure of homoepitaxial SrTiO3 films and their influence on oxide-heterostructure interfaces, Nanoscale, Vol: 6, Pages: 2598-2602, ISSN: 2040-3364

The properties of single-crystal SrTiO3 substrates and homoepitaxial SrTiO3 films grown by pulsed laser deposition have been compared, in order to understand the loss of interfacial conductivity when more than a critical thickness of nominally homoepitaxial SrTiO3 is inserted between a LaAlO3 film and a SrTiO3 substrate. In particular, the chemical composition and the structure of homoepitaxial SrTiO3 investigated by low-energy ion-scattering and surface X-ray diffraction show that for insulating heterointerfaces, a Sr-excess is present between the LaAlO3 and homoepitaxial SrTiO3. Furthermore, an increase in the out-of-plane lattice constant is observed in LaAlO3, indicating that the conductivity both with and without insertion of the SrTiO3 thin film originates from a Zener breakdown associated with the polar catastrophe. When more than a critical thickness of homoepitaxial SrTiO3 is inserted between LaAlO3 and SrTiO3, the electrons transferred by the electronic reconstruction are trapped by the formation of a Sr-rich secondary phase and Sr-vacancies. The migration of Sr towards the surface of homoepitaxial SrTiO3 and accompanying loss of interfacial conductivity can be delayed by reducing the Sr-content in the PLD target.

Journal article

Cavallaro A, Solis C, Garcia PR, Ballesteros B, Serra JM, Santiso JLet al., 2012, Epitaxial films of the proton-conducting Ca-doped LaNbO4 material and a study of their charge transport properties, SOLID STATE IONICS, Vol: 216, Pages: 25-30, ISSN: 0167-2738

Journal article

Cavallaro A, Ballesteros B, Bachelet R, Santiso Jet al., 2011, Heteroepitaxial orientation control of YSZ thin films by selective growth on SrO-, TiO2-terminated SrTiO3 crystal surfaces, CRYSTENGCOMM, Vol: 13, Pages: 1625-1631, ISSN: 1466-8033

Journal article

Garbayo I, Tarancón A, Santiso J, Cavallaro A, Gràcia, Cané C, Sabaté Net al., 2010, Silicon-based microplatforms for characterization of nanostructured layers with application in intermediate temperature micro solid oxide fuel cells, Pages: 307-313, ISSN: 0272-9172

The present work is devoted to study the development of yttria-stabilized zirconia membranes self-supported on silicon-based microplatforms, to be used as electrolytes on micro solid oxide fuel cells. The microfabrication process to obtain yttria-stabilized zirconia membranes is detailed, and some key aspects for the integration of yttria-stabilized zirconia films deposited by pulsed laser deposition on the silicon-based microplatform are shown. Moreover, the effect on the thermomechanical stability of different fabrication parameters is presented, as well as the way to control the pinhole generation on the membranes. Finally, some electrical characterization guidelines are included, in order to study the effects of the platform and the membrane dimensions on the different measurements performed. © 2010 Materials Research Society.

Conference paper

Cavallaro A, Burriel M, Roqueta J, Apostolidis A, Bernardi A, Tarancon A, Srinivasan R, Cook SN, Fraser HL, Kilner JA, McComb DW, Santiso Jet al., 2010, Electronic nature of the enhanced conductivity in YSZ-STO multilayers deposited by PLD, SOLID STATE IONICS, Vol: 181, Pages: 592-601, ISSN: 0167-2738

Journal article

Garbayo I, Tarancon A, Santiso J, Peiro F, Alarcon-LLado E, Cavallaro A, Gracia I, Cane C, Sabate Net al., 2010, Electrical characterization of thermomechanically stable YSZ membranes for micro solid oxide fuel cells applications, SOLID STATE IONICS, Vol: 181, Pages: 322-331, ISSN: 0167-2738

Journal article

Tarancon A, Sabate N, Cavallaro A, Gracia I, Roqueta J, Garbayo I, Esquivel JP, Garcia G, Cane C, Santiso Jet al., 2010, Residual Stress of Free-Standing Membranes of Yttria-Stabilized Zirconia for Micro Solid Oxide Fuel Cell Applications, International Conference on Surface, Coatings and Nanostructured Materials, Publisher: AMER SCIENTIFIC PUBLISHERS, Pages: 1327-1337, ISSN: 1533-4880

Conference paper

Garbayo I, Tarancón A, Santiso J, Cavallaro A, Gràcia I, Cané C, Sabaté Net al., 2010, Silicon-based microplatforms for characterization of nanostructured layers with application in intermediate temperature micro solid oxide fuel cells, Pages: 142-148, ISSN: 0272-9172

The present work is devoted to study the development of yttria-stabilized zirconia membranes self-supported on silicon-based microplatforms, to be used as electrolytes on micro solid oxide fuel cells. The microfabrication process to obtain yttria-stabilized zirconia membranes is detailed, and some key aspects for the integration of yttria-stabilized zirconia films deposited by pulsed laser deposition on the silicon-based microplatform are shown. Moreover, the effect on the thermomechanical stability of different fabrication parameters is presented, as well as the way to control the pinhole generation on the membranes. Finally, some electrical characterization guidelines are included, in order to study the effects of the platform and the membrane dimensions on the different measurements performed. © 2010 Materials Research Society.

Conference paper

Garbayo I, Tarancon A, Santiso J, Cavallaro A, Roqueta J, Garcia G, Gracia I, Cane C, Sabate Net al., 2009, Fabrication and characterization of yttria-stabilized zirconia membranes for micro solid oxide fuel cells, Conference on Smart Sensors, Actuators, and MEMS IV, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, ISSN: 0277-786X

Conference paper

Tarancon A, Garbayo I, Santiso J, Cavallaro A, Roqueta J, Garcia G, Gracia I, Cane C, Sabate Net al., 2009, YSZ Free-standing Membranes for Silicon-based Micro SOFCs, 11th International Symposium on Solid Oxide Fuel Cells (SOFC), Publisher: ELECTROCHEMICAL SOC INC, Pages: 931-938, ISSN: 1938-5862

Conference paper

Odier P, Girard A, Cointe Y, Donet S, Yu Z, Caroff T, Cavallaro A, Guibadj Aet al., 2007, Coated conductor: Some critical aspects from substrate to device, Beijing International Materials Week, Publisher: TRANS TECH PUBLICATIONS LTD, Pages: 1855-+, ISSN: 0255-5476

Conference paper

Pomar A, Coll M, Cavallaro A, Gazquez J, Mestres N, Sandiumenge F, Puig T, Obradors Xet al., 2006, Interface control in all metalorganic deposited coated conductors: Influence on critical currents, JOURNAL OF MATERIALS RESEARCH, Vol: 21, Pages: 2176-2184, ISSN: 0884-2914

Journal article

Cavallaro A, Sandiumenge F, Gazquez J, Puig T, Obradors X, Arbiol J, Freyhardt HCet al., 2006, Growth mechanism, microstructure, and surface modification of nanostructured CeO2 films by chemical solution deposition, ADVANCED FUNCTIONAL MATERIALS, Vol: 16, Pages: 1363-1372, ISSN: 1616-301X

Journal article

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