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J.R. Ramos-Barrado

Bio: J.R. Ramos-Barrado is an academic researcher from University of Málaga. The author has contributed to research in topics: Thin film & X-ray photoelectron spectroscopy. The author has an hindex of 17, co-authored 17 publications receiving 1732 citations. Previous affiliations of J.R. Ramos-Barrado include Spanish National Research Council.

Papers
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Journal ArticleDOI
TL;DR: In this article, a spray pyrolysis of aqueous copper acetate solutions at temperatures over 200-300 8C range was performed to determine textural and structural properties of the films.

225 citations

Journal ArticleDOI
TL;DR: In this paper, structural, morphological, optical and electrical properties of ZnO thin films prepared by chemical spray pyrolysis fromzinc acetate (Zn(CH 3COO)2 2H2O) aqueous solutions, on polished Si(1 0 0), and fused silica substrates for optical characterization, have been studied in terms of deposition time and substrate temperature.

194 citations

Journal ArticleDOI
TL;DR: In this paper, the textural and structural properties of nanostructured CuO thin films were characterized by scanning electron microscopy, atomic force microscopy (AFM), X-ray diffraction (XRD), and X-Ray photoelectron spectroscopy (XPS).

193 citations

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TL;DR: In this paper, the effects of Zn acetate or/and Zn chloride as ZnO precursors have been studied on the c-preferred orientations of pure ZnOs and ZnsO films doped with aluminium obtained by spray pyrolysis.

138 citations

Journal ArticleDOI
TL;DR: In this paper, structural, optical, and electrical characterization of aluminium-doped zinc oxide thin films grown by the spray pyrolysis method is reported, and the effect of Al concentration on the resistivity and on the X-ray diffraction, transmittance, photoluminescence and Raman scattering spectra of the films.

124 citations


Cited by
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Journal ArticleDOI
TL;DR: This Progress Report highlights the recent developments and the future prospects of the use of phases that react through conversion reactions as both positive and negative electrode materials in Li-ion batteries.
Abstract: Despite the imminent commercial introduction of Li-ion batteries in electric drive vehicles and their proposed use as enablers of smart grids based on renewable energy technologies, an intensive quest for new electrode materials that bring about improvements in energy density, cycle life, cost, and safety is still underway. This Progress Report highlights the recent developments and the future prospects of the use of phases that react through conversion reactions as both positive and negative electrode materials in Li-ion batteries. By moving beyond classical intercalation reactions, a variety of low cost compounds with gravimetric specific capacities that are two-to-five times larger than those attained with currently used materials, such as graphite and LiCoO(2), can be achieved. Nonetheless, several factors currently handicap the applicability of electrode materials entailing conversion reactions. These factors, together with the scientific breakthroughs that are necessary to fully assess the practicality of this concept, are reviewed in this report.

2,108 citations

Journal ArticleDOI
TL;DR: Nanostructured materials such as nano-carbons, alloys, metal oxides, and metal sulfides/nitrides have been used as anodes for rechargeable lithium-ion batteries.
Abstract: In this paper, the use of nanostructured anode materials for rechargeable lithium-ion batteries (LIBs) is reviewed. Nanostructured materials such as nano-carbons, alloys, metal oxides, and metal sulfides/nitrides have been used as anodes for next-generation LIBs with high reversible capacity, fast power capability, good safety, and long cycle life. This is due to their relatively short mass and charge pathways, high transport rates of both lithium ions and electrons, and other extremely charming surface activities. In this review paper, the effect of the nanostructure on the electrochemical performance of these anodes is presented. Their synthesis processes, electrochemical properties, and electrode reaction mechanisms are also discussed. The major goals of this review are to give a broad overview of recent scientific researches and developments of anode materials using novel nanoscience and nanotechnology and to highlight new progresses in using these nanostructured materials to develop high-performance LIBs. Suggestions and outlooks on future research directions in this field are also given.

2,042 citations

Journal ArticleDOI
TL;DR: A highly active photocathode for solar H(2) production is presented, consisting of electrodeposited cuprous oxide, which was protected against photocathodic decomposition in water by nanolayers of Al-doped zinc oxide and titanium oxide and activated for hydrogen evolution with electroDeposited Pt nanoparticles.
Abstract: A clean and efficient way to overcome the limited supply of fossil fuels and the greenhouse effect is the production of hydrogen fuel from sunlight and water through the semiconductor/water junction of a photoelectrochemical cell, where energy collection and water electrolysis are combined into a single semiconductor electrode. We present a highly active photocathode for solar H(2) production, consisting of electrodeposited cuprous oxide, which was protected against photocathodic decomposition in water by nanolayers of Al-doped zinc oxide and titanium oxide and activated for hydrogen evolution with electrodeposited Pt nanoparticles. The roles of the different surface protection components were investigated, and in the best case electrodes showed photocurrents of up to -7.6 mA cm(-2) at a potential of 0 V versus the reversible hydrogen electrode at mild pH. The electrodes remained active after 1 h of testing, cuprous oxide was found to be stable during the water reduction reaction and the Faradaic efficiency was estimated to be close to 100%.

1,856 citations

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TL;DR: The high capacity and rate capability of mesoporous Co3O4 nanowire (NW) arrays as anodes in Li ion batteries are reported, with their ease of large area synthesis and superior electrochemical properties.
Abstract: We report the high capacity and rate capability of mesoporous Co3O4 nanowire (NW) arrays as anodes in Li ion batteries. At a current of 1C, the NW arrays maintain a capacity of 700 mAh/g after 20 discharge/charge cycles. When the current is increased to 50C, 50% of the capacity can be retained. With their ease of large area synthesis and superior electrochemical properties, these Co3O4 NW arrays will be interesting for practical Li ion batteries.

1,233 citations

Journal ArticleDOI
TL;DR: In this paper, the authors provide a comprehensive review with respect to the structure, chemistry, design and selection of materials, underlying mechanisms, and performance of each SOFC component, and it opens up the future directions towards pursuing SOFC research.

1,119 citations