title: General synthesis of multi-shelled mixed metal oxide hollow spheres with superior lithium storage properties.
abstract: 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 mA h g(-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.
authors: TUM CREATE, 1 CREATE Way, #10-02 CREATE Tower, Singapore 138602 (Singapore) http://www.ntu.edu.sg/home/xwlou; School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459 (Singapore).
authors: Genqiang
authors: G
authors: Zhang
authors: Xiong Wen David
authors: XW
authors: Lou
mesh_terms: D008094:Lithium / Q000737:chemistry*; D008670:Metals / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D010087:Oxides / Q000737:chemistry
chemical_list: D008670:Metals; D010087:Oxides; D008094:Lithium
keywords: hollow spheres; lithium ion batteries; lithium storage; mixed metal oxides; nanostructures