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Open Access Controllable synthesis, characterization and lithium ion battery performance of LiFePO4 nanosheets

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Olivine LiFePO4 nanosheets were controllably synthesized via a simple hydrothermal method, followed by a post-annealing process. The synthesized nanomaterials were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results indicate that the addition of triethylene glycol (TEG) in the solvent has great influence on the particle morphology. By adjusting the volume ratio of water and TEG in reaction system, different LiFePO4 nanocrystalline including nanorods, nanosheets, nanobelts and laminars could be synthesized controllably. Dispersive and thin LiFePO4 nanosheets were obtained in the solvent with the water/TEG volume ratio of 1:1, the average thickness of the nanosheets is about 50 nm, and its up and bottom planes are (±100). The Li ion battery performance of synthesized LiFePO4 nanomaterials were measured, the LiFePO4 nanosheets show good electrochemical property. At a rate of 0.2 C, its initial discharge specific capacity can reach 153.8 mAhg–1 at room temperature, and the capacity retention can reach 87.6% after 150 cycles. As a comparison, the relative discharge specific capacity and capacity retention of LiFePO4 nanorods synthesized in the pure water are only 125.9 mAhg–1 and 81.7%, respectively.
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Document Type: Research Article

Publication date: August 1, 2016

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  • Materials Express is a peer-reviewed multidisciplinary journal reporting emerging researches on materials science, engineering, technology and biology. Cutting-edge researches on the synthesis, characterization, properties, and applications of a very wide range of materials are covered for broad readership; from physical sciences to life sciences. In particular, the journal aims to report advanced materials with interesting electronic, magnetic, optical, mechanical and catalytic properties for industrial applications.
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