LiFePO4/C composite with different types of organic carbon sources has been synthesized by carbon thermal reduction technique. The physical characteristics and electrochemical properties of LiFePO4/C composite have been studied compared with commercial products. It is shown that good carbon-coated LiFePO4/C composite can be obtained with 13wt.% glucose as carbon source, which has effected on the good processing performance due to its suitable specific surface area of 26.3m2/g and high tap density of 1.3g/cm3. Furthermore, it has contributed to the high-rate electrochemical property with discharge capacity of 128mAh/g at 1C (1C=170 mAh/g).
The stress-strain condition and flange state during spinning of magnesium alloy rotators was researched. The preliminary conclusion is obtained: There are three states during spinning of rotators, which appropriate "forward" and "straight" is conducive to forming, but the "backward" should be avoided. Based on ABAQUS/Explicit platform to analyze flange state and forming quality of these rotators under various load conditions. FE analysis shows: blank diameter, roller structure and feed ratio are key factors of formability. Most favorable process parameters are blank diameter 160mm, feed ratio 0.8r/mm, while using combination roller. Finally, the role of the main process parameters on flange state was verified by experiment method.
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