GLYCINE-ASSISTED SOL–GEL SYNTHESIS OF LiFePO4/C CATHODE MATERIALS FOR LITHIUM-ION BATTERIES
2010 ◽
Vol 03
(03)
◽
pp. 217-221
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Keyword(s):
Sol Gel
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Glycine was firstly used as a chelating agent to prepare LiFePO4/C cathodes by the sol–gel process and sucrose as carbon source. The effects of calcination temperature on properties of LiFePO4/C cathode were investigated using scanning electron microscope (SEM), X-ray diffraction (XRD), galvanostatic charge-discharge and cyclic voltammogram (CV) respectively. The XRD patterns indicate that all samples were of good crystallinity. The primary particle size increased with the calcination temperature from 600 to 750°C. The LiFePO4/C sample synthesized at 700°C has the best electrochemical performance with an initial discharge capacity of 162.6 mAh g-1 at 0.1 C and the discharge capacity remains at 154.6 mAh g-1 after 50 cycles.