LiFePO4 can be used as a cathode material for rechargeable lithium-ion batteries.1 However, its application is limited due to the relatively poor ionic and electronic conductivity.2 It has been reported that the low conductivity of LiFePO4 can be improved by synthesizing superfine particles, carbon coating and metal-ion doping. "5 The traditional production of LiFePO4 is usually time-consuming, energy-inefficient, and costly. Supercritical water (SCW) has recently gained great interest as a green and controllable media for synthesis of LiFePO^6"8 In this work, a rapid and continuous synthesis of LiFePO4 nanoparticles and LiFePO4/C in supercritical water was explored. The effects of temperatures, residence time and the organic substances on the formation of LiFePO4 particles were investigated. Carbon coating of LiFePO4 was also examined.
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