Effect of different additives on the electrochemical behaviour of nickel hydroxide electrodes employed in batteries

dc.creatorReal, Silvia
dc.creatorOrtiz, Mariela
dc.creatorCastro, Élida Beatriz
dc.date.accessioned2017-11-28T19:44:52Z
dc.date.available2017-11-28T19:44:52Z
dc.date.issued2014-08-31
dc.description.abstractNickel 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 depends on the specific capacity of the positive electrode and the utilization of the active material because of the positive electrode capacity limitation. The poor conductivity of active material requires the addition of some additives to increase conductivity and, additionally, to increase the oxygen evolution potential, the charge efficiency and to inhibit the development of γ-NIOOH phase. Many studies have been published on nickel hydroxide with different additives to obtain optimum performance; for example: cobalt [1-2], carbonaceous materials [3], calcium [3], zinc [2] and nanomaterials [4]. In this work, we have studied the electrochemical behaviour of nickel hydroxide electrodes containing additives as: cobalt (by electroless technique), nanosized Ni(OH)2 (by direct mix with active material) and MWCNTs (incorporated to active material during hydrothermal synthesis). Their electrochemical characterization was investigated by using cyclic voltammetry, charge-discharge cycling, and electrochemical impedance spectroscopy (EIS) techniques. The experimental EIS data are used to identify the model parameters by fitting the theoretical impedance function; this was derived from the physicochemical model based on the theory of porous electrodes with the charge/discharge processes occurring at the active material/electrolyte interface [5]. The results are found to be useful to determine the key factors responsible of the electrochemical performance of nickel hydroxide electrodes.es_ES
dc.description.affiliationFil: Real, Silvia. UTN (Universidad Tecnológica Nacional); Argentina. INIFTA (Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas) CONICET; Argentinaes_ES
dc.description.affiliationFil: Ortiz, Mariela. UTN (Universidad Tecnológica Nacional); Argentina. INIFTA (Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas) CONICET; Argentinaes_ES
dc.description.affiliationFil: Castro, Élida Beatriz. INIFTA (Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas) CONICET; Argentinaes_ES
dc.description.peerreviewedPeer Reviewedes_ES
dc.formatapplication/pdf
dc.identifier.urihttp://hdl.handle.net/20.500.12272/2461
dc.language.isoenges_ES
dc.publisherAnnual Meeting of the International Society of Electrochemistryes_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.useAtribución (Attribution): En cualquier explotación de la obra autorizada por la licencia será necesario reconocer la autoría (obligatoria en todos los casos). No comercial (Non Commercial): La explotación de la obra queda limitada a usos no comerciales. Sin obras derivadas (No Derivate Works): La autorización para explotar la obra no incluye la posibilidad de crear una obra derivada (traducciones, adaptaciones, etc.). Compartir igual (Share Alike): La explotación autorizada incluye la creación de obras derivadas siempre que se mantenga la misma licencia al ser divulgadas.es_ES
dc.subjectAdditiveses_ES
dc.subjectElectrochemical behaviour
dc.subjectNickel hydroxide electrodes
dc.subjectBatteries
dc.titleEffect of different additives on the electrochemical behaviour of nickel hydroxide electrodes employed in batterieses_ES
dc.typeinfo:eu-repo/semantics/conferenceObjectes_ES
dc.type.snrddocunento de conferenciaes_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersiones_ES

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