Listar por autor "Ortiz, Mariela"
Mostrando ítems 1-20 de 26
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Characterization of anodes for lithium ion batteries
Humana, Rita; Ortiz, Mariela; Thomas, Jorge; Real, Silvia; Sedlarikova, Marie; Vondrak, Jiri; Visintin, Arnaldo (Springer, 2015-08-14)The lithium-ion batteries are energy storage systems of high performance and low cost. They are employed in multiple portable devices, and these require the use of increasingly smaller and lighter batteries with high energy ... -
Contribución de diferentes aditivos en el comportamiento electroquímico de electrodos de hidróxido de níquel
Ortiz, Mariela; Real, Silvia; Castro, Élida Beatriz (Mattear, 2014-05-13)El hidróxido de níquel es utilizado como material activo en electrodos positivos de las baterías alcalinas recargables de níquel. La capacidad de estas baterías depende de la capacidad específica del electrodo positivo y ... -
Desarrollo y caracterización de materiales de electrodo para dispositivos electroquímicos basados en nuevos criterios de ingeniería de diseño, aplicaciones en sistemas de baterías del tipo Níquel Hidruro metálico
Ortiz, Mariela (2013-03-21)Este trabajo de Tesis Doctoral se enmarca en las líneas de investigación que desarrolla actualmente el grupo de investigación CAE (Conversión y Almacenamiento de Energía) del INIFTA (Instituto de Investigaciones Fisicoquímicas ... -
Effect of cobalt electroless deposition on nickel hydroxide electrodes
Ortiz, Mariela; Castro, Élida Beatriz; Real, Silvia (Elsevier, 2014-02-21)The effects of cobalt additive on the positive electrode surface of nickel alkaline batteries are investigated. Electrode surface modifications by electroless cobalt deposits were made at different immersion times. The ... -
Effect of different additives on the electrochemical behaviour of nickel hydroxide electrodes employed in batteries
Real, Silvia; Ortiz, Mariela; Castro, Élida Beatriz (Annual Meeting of the International Society of Electrochemistry, 2014-08-31)Nickel hydroxide is widely used as the active material in positive electrodes in most nickel-based rechargeable alkaline batteries. The theoretical capacity of nickel hydroxide is 289 mAhg-1. The capacity of these batteries ... -
Electrochemical characterization of MWCNT Ni(OH)2 composites as cathode materials
Ortiz, Mariela; Real, Silvia; Castro, Élida Beatriz (Springer, 2015-09-04)The hydrothermal method was used to synthesize multi-walled carbon nanotube/nickel hydroxide composites (MWCNT/Ni(OH)2). The structure and morphology of the prepared materials were characterized by X-ray diffraction and ... -
Electrochemical characterization of Nickel Hydroxide electrodes with MWCNT
Ortiz, Mariela; Real, Silvia; Castro, Élida Beatriz (Anual Meeting of ISE, 2013-09-08)Alkaline secondary batteries are widely required in the current market of electronic devices. Particularly, nickel hydroxide active material is the positive electrode in Ni/H2 and Ni/MH batteries. Due to their semiconductor ... -
Electrochemical characterization of nickel hydroxide nanomaterials as electrodes for NiMH batteries
Real, Silvia; Ortiz, Mariela; Castro, Élida Beatriz (Springer, 2016-08-23)β-Nickel hydroxide was successfully synthesized by a hydrothermal method. Nano-nickel hydroxide material was characterized by X-ray diffraction, infrared absorption spectroscopy, and transmission electron microscopy. They ... -
Electrochemical performance comparison of MWCNTs Ni (OH)2 composite materials by two preparation routes
Ortiz, Mariela; Castro, Élida Beatriz; Real, Silvia (Springer, 2017)Carbon materials are used to improve the nickel hydroxide electrode capacity in rechargeable alkaline batteries. Herein, we present the preparation of multiwall carbon nanotubes/nickel hydroxide composites (MWCNTs/Ni ... -
Electrochemical performance of Carbon Sulfur as Lithium Sulfur battery cathodes
Ortiz, Mariela; Visintin, Arnaldo; Real, Silvia (Topical Meeting of the International Society of Electrochemistry, 2017-03-19)Nowadays, rechargeable batteries with higher energy density are required for our society due to the needs of cleaner and more efficient energy systems and with the objective of supplying the increasing technological demands. ... -
Estudio de diferentes aditivos en el electrodo de hidróxido de níquel
Ortiz, Mariela; Real, Silvia (Jornada de Ciencia y Tecnología UTN-FRLP 2013, 2013-10-09)La tendencia mundial de optar por tecnologías denominadas “limpias” conlleva a que se invierta en el desarrollo de fuentes energéticas alternativas. Dentro de estos dispositivos se incluye a las baterías alcalinas del tipo ... -
Estudio del agregado de cobalto vía “electroless” a electrodos de hidróxido de níquel
Ortiz, Mariela; Castro, Élida Beatriz; Real, Silvia (2013-04-09)El hidróxido de níquel es utilizado como material de cátodos en baterías alcalinas del tipo Ni/Cd, Ni/Fe, Ni/Zn, Ni/H, Ni/MH. Para mejorar las propiedades de este material y así su desempeño, en los dispositivos mencionados, ... -
Hydrothermal synthesis of cathode materials for rechargeable lithium ion battery
Ortiz, Mariela; Real, Silvia; Visintin, Arnaldo (Annual Meeting of the International Society of Electrochemistry, 2014-08-31)The Lithium-ion batteries are electrochemical systems based on the use of intercalation compounds supported on porous structures with different characteristics. The Li-ion battery operates by intercalation of Li+ cations ... -
Nickel oxide performance as anode material for lithium ion batteries
Ortiz, Mariela; Visintin, Arnaldo; Real, Silvia (IWLiME, 2016-11-01)Lithium ion batteries, as a rechargeable power source, have attracted much more attention due to their extensive applications in portable electronic devices and electric vehicles. Although most commercial Li-ion batteries ... -
Obtención y caracterización de Li(Ni1/3Co1/3Mn1/3)O2, material de cátodo en baterías de ion litio
Gamba, Martina; Ortiz, Mariela; Suárez, Gustavo; Real, Silvia (JONICER, 2017-10-09)Argentina, junto con Bolivia y Chile conforman lo que se ha denominado el “Triángulo del litio”, concentrando entre los tres países el 55% de las reservas mundiales de litio y cerca del 85% de los depósitos de salmueras. El ... -
Preparación y caracterización de ánodos de baterías de ion Litio
Ortiz, Mariela; Real, Silvia (J, 2013-10-09)El uso de fuentes de energía, basadas en recursos renovables, ha sido ampliamente reconocido como la alternativa más viable para resolver problemas asociados con la combustión térmica convencional, tal es como su ineficiencia ... -
Preparación y caracterización de materiales compuestos para electrodos de baterías de litio
Ortiz, Mariela (JONICER, 2016)En la actualidad el mercado de las baterías empleadas en los dispositivos portátiles está dominado por el uso de las baterías de litio. Las baterías de litio son sistemas electroquímicos basados en el uso de materiales ... -
Preparación y caracterización del electrodo positivo de baterías de Ni-HM con aditivos de cobalto
Ortiz, Mariela; Castro, Élida Beatriz; Real, Silvia (HYFUSEN, 2013-06-09)La tendencia mundial de optar por tecnologías denominadas “limpias” conlleva a que se invierta en el desarrollo de tecnologías de fuentes energéticas alternativas. Dentro de estos dispositivos se incluye a las baterías ... -
Preparation and characterization of electrode materials in lithium batteries
Ortiz, Mariela; Real, Silvia; Visintin, Arnaldo (Electrochemistry from Sensing to Energy Conversion and Storage, 2015)The lithium batteries are electrochemical systems based on the use of intercalation compounds supported on porous structures. Different materials are used as cathodes: for example, mixed oxides of transition metals (LiMO2, ... -
Preparation and characterization of graphite anode for lithium ion batteries
Humana, Rita; Ortiz, Mariela; Thomas, Jorge; Real, Silvia; Visintin, Arnaldo (Advanced Batteries, Accumulators and Fuel Cells, 2014-08-24)The lithium-ion batteries are energy storage systems of high performance and low cost for use in multiple portable devices. These require the use of increasingly smaller and lighter batteries with high energy and power ...