title: Synthesis and electrochemical characterization of LiMn0.6Fe0.4PO4/C cathode material via a modified-solid state reaction method.
abstract: LiMn0.6Fe0.4PO4/C cathode material is synthesized via a modified-solid state reaction method. The calcination temperature is adjusted in the range of 500-700 degrees C for 10 h. The crystal structure, morphology, and carbon coating layer of the synthesized LiMn0.6Fe0.4PO4/C are analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), respectively. The electrochemical performance of LiMn0.6Fe0.4PO4/C, such as initial capacity, rate capability, cycling performance and EIS is also evaluated. The synthesized cathode material shows around 100-200 nm of primary particle size with no impurities. The highest initial discharge capacity of 162.1 mA h g(-1) and columbic efficiency of 98.5% are obtained at a heat treatment temperature of 600 degrees C. In addition, LiMn0.6Fe0.4PO4/C active material shows the high capacity retention of 85% at 5 C compared to 0.2 C. It also shows the excellent capacity retention of 97.5% after the 50th charge/discharge.
authors.affiliation: Battery Research Center, Korea Electrotechnology Research Institute, Changwon 642-120, Korea.
authors.forename: Hyun-Ju
authors.initials: HJ
authors.lastname: Kim
authors.forename: Bong-Soo
authors.initials: BS
authors.lastname: Jin
authors.forename: Dong-Sik
authors.initials: DS
authors.lastname: Bae
authors.forename: Seong-Bae
authors.initials: SB
authors.lastname: Kim
authors.forename: Hyun-Soo
authors.initials: HS
authors.lastname: Kim
mesh_terms: D004553:Electric Conductivity; D004563:Electrochemistry / Q000379:methods; D004566:Electrodes; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008094:Lithium / Q000737:chemistry*; D008345:Manganese / Q000737:chemistry*; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size
chemical_list: D010087:Oxides; C488552:lithium manganese oxide; D008345:Manganese; D008094:Lithium