Preparation and electrochemical properties of LiMn1−xFexPO4/C composite cathode materials for lithium ion batteries. Issue 9 (November 2015)

• Record Type: Journal Article
• Authors: Li, Shanshan; Su, Zhi; Muslim, Arzugul; Jiang, Xiaokang; Wang, Xinyu
• Is Part Of: Ceramics international. Volume 41:Issue 9(2015)Part A
• Page Start: 11132
• Page End: 11135
• Publication Date: 2015-11
• Subjects: LiMn1−xFexPO4/C -- Nanoparticles -- Sol–gel -- Electrochemical properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.05.061
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Carbon-coated LiMn1− x Fe x PO4 /C ( x =0, 0.1, 0.3, 0.5) nanoparticles have been synthesized by a two-step sol–gel method. The materials show good crystallinity and a uniform grain size of about 100 nm. The LiMn1− x Fe x PO4 /C composites deliver the best initial specific discharge capacities of 160 mA h g −1 at 0.05 C for x =0.3, LiMn0.7 Fe0.3 PO4 /C retained 157 mA h g −1 (97.8%) after 40 cycles, demonstrating excellent cyclability. Results suggest that the improved cycling stability of the doped composites results from mitigated Mn 2+ dissolution due to Fe 2+ substitution. Impedance measurements reveal the R ct and W s impedance of the doped composites to be much lower than the non-doped samples.