Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 53, Issue 34, Pages 9041-9044Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201404604
Keywords
hollow spheres; lithium ion batteries; lithium storage; mixed metal oxides; nanostructures
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Funding
- Singapore National Research Foundation under its Campus for Research Excellence and Technological Enterprise (CREATE) programme
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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 CoMn2O4 triple-shelled hollow spheres exhibit a specific capacity of 726.7 mAhg(-1) 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.
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