NANOSTRUCTURED ANODE MATERIAL FOR Li-ION BATTERY OBTAINED BY GALVANIC PROCESS

Risultato della ricerca: Conference contribution

Abstract

The accumulation of energy by batteries plays a fundamental role for the production of electrical energy and for its efficient management. Between different storage systems the lithium-ion battery are considered very interesting. Although they are now a well-established commercial reality, they are still subject of vigorous research efforts, in order to make improvements primarily in terms of costs, safety and energy density. The latter is in fact still low compared to that of fossil fuels, if you think to the automotive field. In particular efforts are focused towards the identification of valid alternatives to the electrode materials so as to overcome the limitations and extend the use of these batteries in the applications of interest for the future. The purpose of this work is consisted in the synthesis and characterization of an anode material innovative, the hydroxy-lead chloride (PbOHCl) innanostructured shape. The idea of synthesizing the above compound comes from the results recently published by Shu et al [1] that in order to improve the performance of the anodes made from Pb for lithium-ion batteries have proposed the use of PbOHCl. In fact, Pb based material anode although have shown clear advantages in terms of capacity attained and economy, still have limitations related to the low cyclability, that can be improved by the introduction hydroxyl and chloride functional groups. In this way it is possible to achieve a theoretical capacity of about 661 mAh/g. In this work to improve the electrochemical performance, this compound was obtained in the shape of nanowires. This is a key point because the nanostructures, in addition to ensure a very high surface area with a higher utilization of the active material and therefore a higher specific energy, thanks to their small size allow to better absorb the mechanical stresses associated with the volume expansion avoiding the pulverization on the anode. Furthermore, the use of the nanostructures would improve the kinetics of the electrode reactions because increase the rate of insertion / extraction of Li due to less diffusion path and ensure a higher rate of electron transfer. In particular we have developed a innovative fabrication procedure that permit to obtain directly in the channels of a nonporous template the PbOHCl compound by a galvanic process. Here the preliminary results will be showed. [1] J. Shu et al, Electrochimica Acta, 2013, 102, 381-387.
Lingua originaleEnglish
Titolo della pubblicazione ospiteINTERNATIONAL CONFERENCE ON NANOTECHNOLOGY BASED INNOVATIVE APPLICATIONS FOR THE ENVIRONMENT
Numero di pagine1
Stato di pubblicazionePublished - 2016

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