Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 37, Pages 10787-10791Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201503487
Keywords
electrochemistry; catalysis; lithium-ion batteries; mixed-metal oxides; nanostructures
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Funding
- National Basic Research Program of China [2011CB935901, 2014CB931800, 2013CB933900]
- National Natural Science Fund of China [21371108, 21431006, 91227103]
- Shandong Provincial Natural Science Foundation for Distinguished Young Scholar [JQ201304]
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Hollow structures of transition-metal oxides, particularly mixed-metal oxides, could be promising for various applications such as lithium-ion batteries (LIBs). Compared to the synthesis of metal oxide hollow spheres by the template method, non-spherical metal oxide hollow hexagonal polyhedra have not been developed to date. Herein, we report the controlled hydrothermal synthesis of a new phase of Co(3)V(2)O(8)nH(2)O hollow hexagonal prismatic pencils (HHPPs), which is composed of uniform structural units. By varying the amount of NaOH in the presence of NH4+ and without any template or organic surfactant, the hexagonal prismatic pencils gradually transform from solid into hollow structures, with sizes varying from 5 to 20m. The structure of pencils can be preserved only in a limited range of the molar ratio of OH-/NH4+. As a new anode material for LIBs, such hollow pencils exhibit impressive lithium storage properties with high capacity, good cycling stability, and superior rate capability.
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