title: Porous CoFe2O4nanocubes derived from metal-organic frameworks as high-performance anode for sodium ion batteries.
abstract: Recently sodium ion batteries (SIBs) as a new energy storage system have attracted enormous interests. Unfortunately, the development of high-performance electrode materials for SIBs is restricted owing to the large volume change during sodium insertion and extraction. In this work, porous CoFe2O4nanocubes (PCFO-NCs) were prepared simply by annealing metal-organic frameworks and used as anode materials for SIBs. The PCFO-NCs exhibit a high initial Coulombic efficiency of 68.8% and a maximum reversible capacity of 360mAhg-1after 50 cycles at the current density of 50mAg-1, as well as good rate capability and excellent cycling stability at high current density. The excellent electrochemical performance can be attributed the short diffusion distance of sodium ion due to the good interfacial contact between electrode and electrolyte, and the buffering of volume change during charge/discharge processes by the porous structure.
authors.affiliation: Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Materials Science, East China Normal University, Shanghai 200062, China; Anhui Key Laboratory of Spin Electron and Nanomaterials, Suzhou University, Suzhou, Anhui 234000, China.
authors.forename: Xiaojie
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Materials Science, East China Normal University, Shanghai 200062, China.
authors.forename: Dongsheng
authors.initials: D
authors.lastname: Li
authors.affiliation: Anhui Key Laboratory of Spin Electron and Nanomaterials, Suzhou University, Suzhou, Anhui 234000, China.
authors.forename: Guang
authors.initials: G
authors.lastname: Zhu
authors.affiliation: Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Materials Science, East China Normal University, Shanghai 200062, China. Electronic address: tlu@phy.ecnu.edu.cn.
authors.forename: Ting
authors.initials: T
authors.lastname: Lu
authors.affiliation: Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Materials Science, East China Normal University, Shanghai 200062, China. Electronic address: lkpan@phy.ecnu.edu.cn.
authors.forename: Likun
authors.initials: L
authors.lastname: Pan
keywords: Metal-organic frameworks; Porous CoFe(2)O(4) nanocubes; Sodium ion batteries