Journal of Shanghai University(Natural Science Edition) ›› 2019, Vol. 25 ›› Issue (6): 950-956.doi: 10.12066/j.issn.1007-2861.1946

• Research Articles • Previous Articles     Next Articles

Preparation and properties of hollow ZnCo$_\textbf{2}$O$_\textbf{4}$/ZnO nanoboxes derived from MOFs as anode materials for lithium ion batteries

Ziming GAO, Jingyu DONG, Dayong CHEN, Shoushuang HUANG, Zhangjun HU, Zhiwen CHEN()   

  1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
  • Received:2017-04-26 Online:2019-12-30 Published:2019-12-31
  • Contact: Zhiwen CHEN E-mail:zwchen@shu.edu.cn

Abstract:

Graphite is commonly used as an anode material in lithium ion batteries. However, it cannot meet the increasing needs of higher capacity because of low specific capacity (372.0 mA$\cdot$h/g). Thus, rationally synthesis and design of high performance anode materials is a key factor in improving energy density and electrochemistry properties of lithium ion batteries. ZIF-8 was synthesized and encapsulated with ZIF-67 to form core-shell ZIF-8@ZIF-67. This was followed by a subsequent annealing treatment to obtain hollow ZnCo$_2$O$_4$/ZnO nanoboxes. Morphologies and structures of hollow ZnCo$_2$O$_4$/ZnO nanoboxes were characterized with XRD, SEM and TEM. When tested as anode materials for lithium ionbatteries, the hollow ZnCo$_2$O$_4$/ZnO nanoboxes exhibited enhanced performance. Specifically, discharge capacity of 1 536.8 mA$\cdot$h/g was achieved in the first cycle, and retains 780 mA$\cdot $h/g after 100 cycles at a current density of 100 mA/g.

Key words: metal-organic framework (MOF), lithium ion battery, anode material

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