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TitleGe thin film anode in a flexible solid-state Li-ion microbattery
Author(s)Vieira, E. M. F.
Ribeiro, J. F.
Rua, João
Silva, Maria Manuela
Correia, J. H.
Goncalves, L. M.
Issue date23-Oct-2015
Abstract(s)Flexible solid-state lithium ion batteries (LIBs) have become an important part of the portable electronics due to their flexibility, lightweight, easy portability, security and the ability to be adjusted in large-scale energy storage microsystems, with significantly high power and long cycle life. Germanium (Ge) is a promising anode material for high-generation LIBs, with high theoretical capacity (1600 mAh/g corresponding to Li4.4Ge), fast Li ion diffusivity (i.e. 400 times faster than silicon) and good electronic conductivity (104 times higher than silicon) which allow high charge/discharge rates. Here, electrochemical performance of e-beam deposited Ge anode (300 nm thick) coupled with LiCoO2/LIPON (cathode/electrolyte) in a microbattery system was investigated. The battery (figure 1) was fabricated only by PVD techniques. LiCoO2 was deposited by RF-sputtering (120 W RF power; 17 sccm of Ar) and LIPON with the conditions explained in JF Ribeiro, et al. [1]. Open circuit potential (figure 2), charge/discharge cycles (figure 3) and electrochemical impedance spectroscopy (EIS), at room temperature, were performed.
TypeConference paper
AccessRestricted access (UMinho)
Appears in Collections:CAlg - Artigos em livros de atas/Papers in proceedings
CDQuim - Comunicações e Proceedings
DEI - Artigos em atas de congressos internacionais

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