Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5453725 | Energy Storage Materials | 2017 | 27 Pages |
Abstract
Sodium ion batteries (SIBs) have attracted extensive attention in recent years. However, the large volume change of cathode materials during the charge and discharge processes impedes the progress and application of SIBs. In this paper, three-dimensional (3D) tetsubo-like Beta-iron oxy-hydroxide (β-FeOOH) nano-cuboids on carbon nanotubes (CNTs) are synthesized by a simple solution method and used as cathode for SIBs. The β-FeOOH exhibits a (2Ã2) tunnel-type configuration, which can provide huge space for reversible sodium. The radial distribution of β-FeOOH nano-cuboids on the CNTs provides plenty cushion space and sufficient contact area with electrolyte during charge and discharge processes. Furthermore, the CNTs can enhance the electric conductivity and prevent the nanocomposite from agglomeration. Benefiting from the unique structure, the hybridization nanocomposite delivers a high initial discharge capacity (271 mA h gâ1 at 10 mA gâ1), long cycle life (120 mA h gâ1 after 150 cycles with ~0.1% capacity decay per cycle at 120 mA gâ1) and high rate performance (118 mA h gâ1 at a current density of 240 mA gâ1). These results indicate that the β-FeOOH@CNTs nanocomposite electrode may be a promising candidate for SIBs. Our work may provide a new way to construct and design high-performance cathode electrode materials for SIBs and related systems.
Keywords
Related Topics
Physical Sciences and Engineering
Energy
Fuel Technology
Authors
Erjin Zhang, Bin Wang, Xinzhi Yu, Jingyi Zhu, Longlu Wang, Bingan Lu,