General synthesis of multi-shelled mixed metal oxide hollow spheres with superior lithium storage properties

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Original languageEnglish
Pages (from-to)9041-9044
Journal / PublicationAngewandte Chemie - International Edition
Issue number34
Publication statusPublished - 18 Aug 2014
Externally publishedYes


Complex hollow structures of transition metal oxides, especially mixed metal oxides, could be promising for different applications such as lithium ion batteries. However, it remains a great challenge to fabricate well-defined hollow spheres with multiple shells for mixed transition metal oxides. Herein, we have developed a new "penetration-solidification-annealing" strategy which can realize the synthesis of various mixed metal oxide multi-shelled hollow spheres. Importantly, it is found that multi-shelled hollow spheres possess impressive lithium storage properties with both high specific capacity and excellent cycling stability. Specifically, the carbon-coated CoMn<sub>2</sub>O<sub>4</sub> triple-shelled hollow spheres exhibit a specific capacity of 726.7 mAhg<sup>-1</sup> and a nearly 100% capacity retention after 200 cycles. The present general strategy could represent a milestone in design and synthesis of mixed metal oxide complex hollow spheres and their promising uses in different areas. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Research Area(s)

  • hollow spheres, lithium ion batteries, lithium storage, mixed metal oxides, nanostructures

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