Evaluation of double-layer density modulated Si thin films as Li-ion battery anodes. (16th October 2017)

• Record Type: Journal Article
• Authors: Demirkan, Muhammed Taha; Yurukcu, Mesut; Dursun, Burcu; Demir-Cakan, Rezan; Karabacak, Tansel
• Is Part Of: Materials research express. Volume 4:Number 10(2017)
• Publication Date: 2017-10-16
• Subjects: Silicon -- thin film -- lithium-ion -- battery anode; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/aa8f88
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: Double-layer density modulated silicon thin films which contain alternating low and high density Si film layers were fabricated by magnetron sputtering. Two different samples consisting of alternating layers of high-density/low-density and low-density/high-density Si thin film layers were investigated as anode electrodes in Li-ion batteries. Si thin film in which the terminating layer at the top is low density Si layer-quoted as low-density/high-density film (LD/HD)- exhibits better performance than Si thin film that has high density layer at the top, -quoted as high-density/low-density (HD/LD). A highly stabilized cycling performance with the specific charge capacities of 2000 mAh g −1 at the 150th cycle at C/2 current density, and 1200 mAh g −1 at the 240th cycle at 10 C current density were observed for the LD/HD Si anode in the presence of fluoroethylene carbonate (FEC) electrolyte additive.