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Small crystallites LiFePO 4 powder with conducting carbon coating can be synthesized by ultrasonic spray pyrolysis. Cheaper trivalent iron ion is used as the precursor. The pure olivine phase can be prepared with the duplex process of spray pyrolysis (synthesized at 450, 550 or 650°C) and subsequent heat-treatment (at 650°C for 4h). The results indicate that the pyrolysis temperature of 450°C...
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