Effects of heating rate on morphology and performance of lithium iron phosphate synthesized by hydrothermal route in organic-free solution
| Autor: | Xiuqin Ou, Changqing Min, Li Wang, Shi Zhixiang, Guangchuan Liang |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
General Chemical Engineering Lithium iron phosphate Diffusion Inorganic chemistry General Engineering General Physics and Astronomy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Thermal diffusivity Electrochemistry 01 natural sciences Hydrothermal circulation 0104 chemical sciences law.invention chemistry.chemical_compound chemistry law Hydrothermal synthesis General Materials Science Solubility Crystallization 0210 nano-technology |
| Zdroj: | Ionics. 24:1285-1292 |
| ISSN: | 1862-0760 0947-7047 |
| DOI: | 10.1007/s11581-017-2287-3 |
| Popis: | Flake-like LiFePO4 were hydrothermally synthesized in an organic-free solution at heating rates of 0.5, 1.5, 3, and 5 °C min−1. The heating rate has a marked influence on crystal morphology but scarcely on phase purity. The reason for morphology variations is discussed based upon the solubility of precursors Li3PO4 and Fe3(PO4)2·8H2O. The optimum heating rate for hydrothermal synthesis of LiFePO4 is 3 °C min−1. The as-synthesized material exhibits a high specific capacity, excellent rate capability, good low-temperature performance and Li+ diffusivity after carbon coating, all of which could be ascribed to shortened Li+ diffusion distance and higher crystallization degree of the crystalline. |
| Databáze: | OpenAIRE |
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