4.7 Article

Metal-organic frameworks derived yolk-shell ZnO/NiO microspheres as high-performance anode materials for lithium-ion batteries

Journal

CHEMICAL ENGINEERING JOURNAL
Volume 335, Issue -, Pages 579-589

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2017.10.183

Keywords

ZnO/NiO; Yolk-shell; Anode material; Lithium storage

Funding

  1. CAS Interdisciplinary Innovation Team
  2. National Natural Science Foundation of China [21574043]
  3. National Key Basic Research Program of China [2013CB921801]

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Smart design and rational fabrication of novel anode materials with high specific capacity and long cycling stability are of significant importance for high-performance lithium-ion batteries (LIBs). Herein, nanostructured ZnO/NiO microspheres with a nanorods-composed shell and a microsphere yolk were synthesized by a controlled calcination treatment of the bimetallic organic frameworks in air. The obtained yolk-shell ZnO/NiO microspheres are observed to have an average diameter of 2 mu m with uniform microsphere morphology from field-emission scanning electron microscopy and high-resolution transmission electron microscopy. Benefitting from the unique yolk-shell structure inherited from the bimetallic organic frameworks and the synergistic effect from ZnO and NiO, the as-prepared yolk-shell ZnO/NiO displays excellent lithium storage performance, including high specific capacity (1008.6 mAh g(-1) at 0.1 A g(-1) after 200 cycles), superior rate capability (437.1 mAh g(-1) at 2 A g(-1)) and outstanding long-term cycling stability (592.4 mAh g(-1) at 0.5 A g(-1) after 1000 cycles), which demonstrates its promising potential as high-performance anode material for LIBs.

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