Electrochemical activity of lightweight borohydrides in lithium cells

TitleElectrochemical activity of lightweight borohydrides in lithium cells
Publication TypePresentazione a Congresso
Year of Publication2015
AuthorsFarina, L., Munaò D., Silvestri L., Panero S., Meggiolaro D., Brutti S., La Barbera A., and Reale P.
Conference Name2015 IEEE 15th International Conference on Environment and Electrical Engineering, EEEIC 2015 - Conference Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
KeywordsBorohydrides, Complex metal hydrides, Conversion process, Conversion reactions, Electric batteries, Electrochemical activities, Electrochemical electrodes, Electrodes, Hydrides, Ions, Lithium, Lithium alloys, Lithium compounds, Lithium-ion batteries, Negative electrode, Negative electrode material, Performance limits

As substitutes for graphite, the negative electrode material commonly used in Li-ion batteries, hydrides have the potential to overcome both safety and performance limits of the current state-of-the-art Li-ion cells. Hydrides can operate through a conversion process proved for some interstitial hydrides like MgH2: MxAy+nLi= xM+yLimA, where m=n/y. Even if far from optimization, outstanding performances were observed, drawing the attention on the whole hydride family. Looking for high capacity systems, lightweight complex metal hydrides, as borohydrides, deserve consideration. Capacities in the order of 2000-4000 mAh/g can be theoretically expected thanks to the very low formula unit weight. Although the potential technological impact of these materials can lead to major breakthroughs in Li-ion batteries, this new research field requires to tackle fundamental issues that are completely unexplored. Our preliminary findings on the incorporation of borohydrides will be here presented. © 2015 IEEE.