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- W2058395536 abstract "A novel preparation technique was developed for synthesizing carbon-coated LiFePO4 nanoparticles through a combination of spray pyrolysis (SP) with wet ball milling (WBM) followed by heat treatment. Using this technique, the preparation of carbon-coated LiFePO4 nanoparticles was investigated for a wide range of process parameters such as ball-milling time and ball-to-powder ratio. The effect of process parameters on the physical and electrochemical properties of the LiFePO4/C composite was then discussed through the results of X-ray diffraction (XRD) analysis, field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), the Brunauer–Emmet–Teller (BET) method and the use of an electrochemical cell of Li|1 M LiClO4 in EC:DEC = 1:1|LiFePO4. The carbon-coated LiFePO4 nanoparticles were prepared at 500 °C by SP and then milled at a rotating speed of 800 rpm, a ball-to-powder ratio of 40/0.5 and a ball-milling time of 3 h in an Ar atmosphere followed by heat treatment at 600 °C for 4 h in a N2 + 3% H2 atmosphere. SEM observation revealed that the particle size of LiFePO4 was significantly affected by the process parameters. Furthermore, TEM observation revealed that the LiFePO4 nanoparticles with a geometric mean diameter of 146 nm were coated with a thin carbon layer of several nanometers by the present method. Electrochemical measurement demonstrated that cells containing carbon-coated LiFePO4 nanoparticles could deliver markedly improved battery performance in terms of discharge capacity, cycling stability and rate capability. The cells exhibited first discharge capacities of 165 mAh g−1 at 0.1 C, 130 mAh g−1 at 5 C, 105 mAh g−1 at 20 C and 75 mAh g−1 at 60 C with no capacity fading after 100 cycles." @default.
- W2058395536 created "2016-06-24" @default.
- W2058395536 creator A5005589369 @default.
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- W2058395536 date "2010-06-01" @default.
- W2058395536 modified "2023-09-27" @default.
- W2058395536 title "Synthesis of carbon-coated LiFePO4 nanoparticles with high rate performance in lithium secondary batteries" @default.
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- W2058395536 doi "https://doi.org/10.1016/j.jpowsour.2009.11.147" @default.
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