Effects of Different Organic Carbon Sources on Properties of LiFePO₄/C Synthesized by Spray-Drying

Abstract:

LiFePO₄/C materials were synthesized by spray-drying using FePO₄·2H₂O, LiOH·H₂O as raw materials, with three kinds of organic carbon sources: soluble starch, crystal sugar and glucose. The particle size, tap density, specific surface area, morphology, structure and electrochemical properties of the LiFePO₄/C were tested and analyzed. The results indicate that the organic carbon source has no effect on the phase of LiFePO₄, but has a remarkable influence on the tap density and specific surface area of LiFePO₄. The LiFePO₄/C synthesized with crystal sugar and glucose has higher tap density, smaller particle size and specific surface area. The LiFePO₄/C synthesized with the glucose as the carbon source exhibited the most excellent electrochemical performance. The discharge capacities are 160.6, 148.5 and 114.1mAh/g respectively at 0.1C, 1C and 5C. Under low temperature 253K, the discharge capacity is 56.2% of that at 298K with 0.2C.

• Periodical: Applied Mechanics and Materials (Volume 535)
• Pages: 725-728
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.535.725
• Online since: February 2014
• Authors: Cheng Lu*, Lin Chen, Yun Bo Chen, Yi Jie Gu, Meng Wang, Ling Li Zuo, Zhao Zhang, Qi An Chen, Hong Quan Liu, Yan Min Wang
• Keywords: Cathode Material, LiFePO₄, Organic Carbon Source, Spray Drying

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