Synthesis of Li2Fe0.9Mn0.1SiO4/C composites using glucose as carbon source

• Published in: Journal of Central South University of Technology. Science & technology of mining and metallurgy Vol. 17; no. 3; pp. 504 - 508
• Main Authors: Peng, Chun-li, Zhang, Jia-feng, Cao, Xuan, Zhang, Bao
• Format: Journal Article
• Language: English
• Published: Heidelberg Central South University 01.06.2010
• Subjects: Engineering; Metallic Materials; lithium ion batteries; lithium iron orthosilicate; cathode; carbon coating
• ISSN: 1005-9784; 1993-0666
• DOI: 10.1007/s11771-010-0514-4

Li 2 Fe 0.9 Mn 0.1 SiO 4 /C composites were synthesized by using glucose as carbon source. The samples were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM) and electrochemical measurements. All Li 2 Fe 0.9 Mn 0.1 SiO 4 /C composites are of the similar crystal structure. With increasing the carbon content in the range of 5%–20% (mass fraction), the diffraction peaks in XRD patterns broaden and the particle sizes and the tap density of samples decrease. The Li 2 Fe 0.9 Mn 0.1 SiO 4 /C composites with carbon content of 14.12% show excellent electrochemical performances with an initial discharge capacity of 154.7 mA·h/g at C /16 rate, and the capacity retention remains 92.2% after 30 cycles.