Fe3O4/Ag microsheets assembled by interlaced nanothorns as high performance anode materials for lithium storage. (13th April 2017)

• Record Type: Journal Article
• Authors: Hao, Qin; Wang, Zhihong; Ye, Jiajia; Xu, Caixia
• Is Part Of: International journal of hydrogen energy. Volume 42:Number 15(2017)
• Page Start: 10072
• Page End: 10080
• Publication Date: 2017-04-13
• Subjects: Fe3O4 -- Nanocomposite -- Dealloying -- Anode -- Li-ion battery; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2017.01.079
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Fe3 O4 /Ag nanocomposite is directly prepared by dealloying a well-designed FeAgAl source alloy in alkaline etching solution at room temperature. Selectively dissolving Al from FeAgAl alloy results in Fe3 O4 /Ag microsheets assembled by second order interlaced nanothorns. On account of the distinctive hierarchical micro-/nano-structure and the hybridization of well conductive Ag, Fe3 O4 /Ag composite shows much improved lithium storage performances with higher capacities, cycling stability, and coulombic efficiency compared with the pure Fe3 O4 anode. Even the current rate is as high as 1 A g −1, the capacity of Fe3 O4 /Ag composite still exceeds 600 mA h g −1 after cycling 500 cycles compared with the remained value of only 294.8 mA h g −1 for pure Fe3 O4 . Moreover, Fe3 O4 /Ag composite presents the excellent rate capabilities at whether low or high current densities. Owing to the superiorities of excellent properties and handy preparation, the Fe3 O4 /Ag anode exhibits encouraging prospect for lithium ion batteries. Graphical abstract: Composited Fe3 O4 /Ag microsheets built by interlaced nanothorns are easily fabricated by selectively etching FeAgAl source alloy in NaOH solution. On account of the distinctive hierarchical micro-/nano-structure and the hybridization of well conductive Ag, Fe3 O4 /Ag composite exhibits much superior lithium storage performances in comparison with the pure Fe3 O4 electrode. Highlights: Fe3 O4 /Ag nanocomposite is prepared by one step dealloying of FeAgAl source alloy. Fe3 O4 /Ag has an unique hierarchical micro-/nano-structure. Fe3 O4 /Ag shows much higher capacity and better cycling stability than pure Fe3 O4 . Fe3 O4 /Ag delivers a high capacity at 1 A g −1 after cycling for 500 cycles.