and Perspectives Sophie Carenco,†,‡,§,∥,⊥ David Portehault,*,†,‡,§ Ced́ric Boissier̀e,†,‡,§ Nicolas Meźailles, and Cleḿent Sanchez*,†,‡,§ †Chimie de la Matier̀e Condenseé de Paris, UPMC Univ Paris 06, UMR 7574, Colleg̀e de France, 11 Place Marcelin Berthelot, 75231 Paris Cedex 05, France ‡Chimie de la Matier̀e Condenseé de Paris, CNRS, UMR 77574, Colleg̀e de France, 11 Place Marcellin Berthelot, 75231 Paris Cedex 05, France Chimie de la Matier̀e Condenseé de Paris, Colleg̀e de France, 11 Place Marcellin Berthelot, 75231 Paris Cedex 05, France Laboratory Heteroelements and Coordination, Chemistry Department, Ecole Polytechnique, CNRS-UMR 7653, Palaiseau, France

Nanoscaled metal borides and phosphides: recent developments and perspectives

Titanium dioxide nanostructures for photoelectrochemical applications

Manganese dioxides, inorganic materials which have been used in industry for more than a century, now find great renewal of interest for storage and conversion of energy applications. In this review article, we report the properties of MnO2 nanomaterials with different morphologies. Techniques used for the synthesis, structural, physical properties, and electrochemical performances of periodic and aperiodic frameworks are discussed. The effect of the morphology of nanosized MnO2 particles on their fundamental features is evidenced. Applications as electrodes in lithium batteries and supercapacitors are examined.

Nanostructured MnO2 as Electrode Materials for Energy Storage

Polypyrrole-covered MnO2 as electrode material for supercapacitor

The role of (photo)electrochemistry in the rational design of hybrid conducting polymer/semiconductor assemblies: From fundamental concepts to practical applications

Electrochemical synthesis of polyaniline-exfoliated graphene composite films and their capacitance properties

Transition metal oxides have applications into energy storage devices such as electrochemical supercapacitors. We deposited nickel oxide (NiO) thin films using electrodeposition under direct and pulse potentiometry. The effects of the pulse electrodeposition conditions are systematically investigated. The results show that the pulse time influences clearly the morphology of thin films deposited. The nanostructure thin film that has been deposited under 1-s on-time condition was proven to be a suitable electrode material since its 1000 Fg−1 at 0.5 Ag−1 specific capacitance is large enough to fulfill the needed requirement. In addition, the thin film at hand has shown 90.1% capacity retention during 800 galvanostatic charge–discharge cycles under 5 Ag−1 current density. Moreover, nanostructured NiO films prepared with pulse electrodeposition method demonstrate high power performance, excellent rate as well as long-term cycling stability, which make them promising electrode materials for supercapacitor applications.

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Capacitance performance of NiO thin films synthesized by direct and pulse potentiostatic methods

Polypyrrole (PPy)–indium phosphide (InP) composite material was electrochemically prepared by the incorporation of InP into a PPy matrix during electrochemical synthesis (cycling) under magnetic stirring from the acetonitrile/LiClO4 electrolyte containing the Py and InP particles. The PPy–InP composite material was designed to explore new approaches to improve light-collection efficiency in polymer photovoltaic. The samples were characterised by cyclic voltammetry, impedance spectroscopy measurement, scanning electron microscopy, energy dispersive X-ray spectroscopy, UV–visible and photoelectrochemical measurements. It was observed that the photocurrent of the composites was higher than that of the single PPy films and increased with InP concentration. The study showed that the presence of InP particles in the polymeric film improves the optical and the photovoltaic properties of PPy and give information on the use possibility of these films for photovoltaic cells' application.

Synthesis and characterisation of polypyrrole–indium phosphide composite film

Titanium oxide is one of the most promising candida te for relatively low cost, simple manufacture and high-performance new generation solar cells and the recent achievements in DSSC solar cells efficiencies and life time confirm the fact that th ese new generation solar cells becomes one of the future solutions in energy conversion. In DSSC solar cells the presence of a dense titanium oxide layer is necessary in order to avoid short circuits between electrodes. Then, the interest to have a second porous TiO 2 layer is determined by the fact that compared to a flat surface, a dye-sensitized porous surface area increase the absorption and hen ce conduct to the increase of solar cells efficiencies. Generally these two layers are prepared by successi ve depositions using two different methods. In this paper we present a simple techniqu e to prepare both layers during the same spraying process. Films morphology and structure of titanium oxide deposited on glass and ITO substrate was investigated by AFM, SEM and XRD respectively.

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Farid Habelhames

Papers

Electrochemical synthesis of polyaniline-exfoliated graphene composite films and their capacitance properties

Capacitance performance of NiO thin films synthesized by direct and pulse potentiostatic methods

Synthesis and characterisation of polypyrrole–indium phosphide composite film

On Titanium Oxide Spray Deposited Thin Films for Solar Cells Applications

Improvement of photoelectrochemical and optical characteristics of MEH-PPV using titanium dioxide nanoparticles