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- W2055762603 abstract "Rate equation of LiFePO4 formation via solid-state reaction has been studied by using a model system: Li(CH3COO) + FePO4 in a reducing atmosphere. Kinetic data were acquired by using in-situ synchrotron X-ray diffraction technique, and the analysis was based on a non-isothermal methodology, which shows that the reaction rate is well described by the rate-equation: [F0.7/(1 − F)0.7] = 1.56 × 1011 exp(−24,100/T)t, where F is the fractional conversion to LiFePO4, T, the calcination temperature (K), and t is the calcination time (min). The equation indicates that the formation of LiFePO4 is intrinsically a fast reaction: 95% conversion can be achieved between 550 and 600 °C in a few hours. Nevertheless, the reaction could be significantly hindered if gas-phase diffusion processes of reactant/product species become rate-limiting, and the gas-flow pattern relative to the powder bed during synthesis thus has a decisive effect on the reaction rate in large-scale synthesis. Single-phased, nanocrystalline LiFePO4 powder having an average crystal size of 35 nm can be synthesized by calcination using flow-through configuration at 600 °C in merely 2 h, and the powder exhibits a capacity of ∼140 mAh g−1." @default.
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- W2055762603 date "2006-07-01" @default.
- W2055762603 modified "2023-10-17" @default.
- W2055762603 title "Kinetic study on low-temperature synthesis of LiFePO4 via solid-state reaction" @default.
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- W2055762603 doi "https://doi.org/10.1016/j.jpowsour.2005.09.005" @default.
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