The effects of calcination temperature on the electrochemical performance of LiMnPO4 prepared by ultrasonic spray pyrolysis

Abstract Carbon-coated LiMnPO 4 powders were prepared by ultrasonic spray pyrolysis. The effects of calcination temperature on the microstructure and electrochemical performance of C-LiMnPO 4 were investigated. X-ray diffraction (XRD) studies showed that the crystallite size varied with calcination temperature. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations revealed that the calcination temperature had a strong influence on the morphology of the prepared final powder, and therefore the subsequent electrochemical performance of the material. The C-LiMnPO 4 powders prepared at 650 °C exhibited excellent electrochemical performance with a discharge capacity of 118 mAh g −1 .

[1]  Haoshen Zhou,et al.  The design of a LiFePO4/carbon nanocomposite with a core-shell structure and its synthesis by an in situ polymerization restriction method. , 2008, Angewandte Chemie.

[2]  Zhumabay Bakenov,et al.  Electrochemical performance of nanocomposite LiMnPO4/C cathode materials for lithium batteries , 2010 .

[3]  L. Nazar,et al.  Nano-network electronic conduction in iron and nickel olivine phosphates , 2004, Nature materials.

[4]  A. Yamada,et al.  Comparative Kinetic Study of Olivine Li x MPO 4 ( M = Fe , Mn) , 2004 .

[5]  Helmut Ehrenberg,et al.  Precursor-based synthesis and electrochemical performance of LiMnPO4 , 2008 .

[6]  Kang Xu,et al.  Optimization of reaction condition for solid-state synthesis of LiFePO4-C composite cathodes , 2005 .

[7]  A. Yamada,et al.  Phase Diagram of Li x ( Mn y Fe1 − y ) PO 4 ( 0 ⩽ x , y ⩽ 1 ) , 2001 .

[8]  Yi-Ping Chiang,et al.  Electrochemical properties of LiFe0.9Mg0.1PO4 / carbon cathode materials prepared by ultrasonic spray pyrolysis , 2007 .

[9]  K. S. Nanjundaswamy,et al.  Phospho‐olivines as Positive‐Electrode Materials for Rechargeable Lithium Batteries , 1997 .

[10]  Yu Jiugao,et al.  The Effects of Citric Acid on the Properties of Thermoplastic Starch Plasticized by Glycerol , 2005 .

[11]  Yet-Ming Chiang,et al.  Electronically conductive phospho-olivines as lithium storage electrodes , 2002, Nature materials.

[12]  Yangfang Sun,et al.  Hydrothermal synthesis of nano-sized anatase TiO2 powders for lithium secondary anode materials , 2006 .

[13]  Margret Wohlfahrt-Mehrens,et al.  Fine-particle lithium iron phosphate LiFePO4 synthesized by a new low-cost aqueous precipitation technique , 2003 .

[14]  Ji‐Guang Zhang,et al.  Synthesis and Characterization of Lithium Manganese Phosphate by a Precipitation Method , 2010 .

[15]  Guohua Li,et al.  LiMnPO4 as the Cathode for Lithium Batteries , 2002 .

[16]  K. Warrier,et al.  Structural Modifications and Associated Properties of Lanthanum Oxide Doped Sol−Gel Nanosized Titanium Oxide , 2002 .