Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 53, Issue 35, Pages 9352-9355Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201404615
Keywords
lithium-ion batteries; mesoporous materials; nonpolar solvents; transition-metal phosphates; ultrathin flakes
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Funding
- MOE under AcRF [ARC 26/13, MOE2013-T2-1-034, RG2/13, RG 61/12, RGT18/13, RG5/13]
- A*STAR SERC [1021700144]
- MPA [23/04.15.03]
- Start-Up Grant in Singapore [M4080865.070.706022]
- Singapore National Research Foundation under CREATE program: EMobility in Megacities
- National Research Foundation, Prime Minister's Office, Singapore
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Materials with ordered mesoporous structures have shown great potential in a wide range of applications. In particular, the combination of mesoporosity, low dimensionality, and well-defined morphology in nanostructures may exhibit even more attractive features. However, the synthesis of such structures is still challenging in polar solvents. Herein, we report the preparation of ultrathin two-dimensional (2D) nanoflakes of transition-metal phosphates, including FePO4, Mn-3(PO4)(2), and Co-3(PO4)(2), with highly ordered mesoporous structures in a nonpolar solvent. The as-obtained nanoflakes with thicknesses of about 3.7 nm are constructed from a single layer of parallel-packed pore channels. These uniquely ordered mesoporous 2D nanostructures may originate from the 2D assembly of cylindrical micelles formed by the amphiphilic precursors in the nonpolar solvent. The 2D mesoporous FePO4 nanoflakes were used as the cathode for a lithium-ion battery, which exhibits excellent stability and high rate capabilities.
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