Effect of Carbon Source on the Particles Morphology and Carbon Structure of LiFePO₄/C Composites

Abstract:

The LiFePO4/C cathode materials were successfully synthesized by solid state method with glucose, sucrose, citric acid, PEG-4000, starch and adlipic acid as carbon sources. The microstructure and morphology of LiFePO4/C composites were characterized by X-ray diffraction, Raman spectroscopy and scanning electron microscopy. The results showed that the carbon source is an important affecting factor for controlling the morphology and size of LiFePO4/C composites and carbon coating layers structure. The carbon coating layers synthesized with glucose and sucrose as carbon sources possess smaller ID/IG ratio demonstrating that carbon coating layers contain higher grapheme carbon. The particles of LiFePO4/C composites synthesized with glucose, PEG-4000 and starch as carbon sources have high dispersibility, good particles size distribution and near-spherical morphology.

• Periodical: Advanced Materials Research (Volume 968)
• Pages: 53-57
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.968.53
• Online since: June 2014
• Authors: Ji Chuan He
• Keywords: Carbon Structure, Composite Material, Lithium Iron Phosphate, Morpholoy, RAMAN

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