Synthesis and Characterization of LiFe0.7Mn0.3PO4/C Cathode Material for Lithium Ion Batteries
LiFe0.7Mn0.3O4/C was synthesized at 650℃ by solid-state reaction. Structure, surface morphology and electrochemical properties of LiFe0.7Mn0.3O4/C were characterized by X-ray diffraction, scanning electron microscopy, and electrochemical measurement, respectively. Results show that LiFe0.7Mn0.3O4 shares a single olivine structure. The morphologies of LiFe0.7Mn0.3O4 are greatly affected by the addition of carbon. The LiFe0.7Mn0.3PO4/C has a small particle size of 100～200nm and carbon is coated on the surface of LiFe0.7Mn0.3O4 uniformly. LiFe0.7Mn0.3O4/C demonstrates high reversible capacity and perfect cycling performance, and excellent rate capability: the reversible capacity of about 141 mAh·g-1 at a current rate of 0.1C and the capacity loss per cycle is only 0.19％ after cycling 60 times, while that of LiFe0.7Mn0.3PO4 is 0.53％ , suggesting the electrochemical performance of LiFe0.7Mn0.3PO4 is improved effectively by addition of carbon.
lithium iron phosphate lithium ion batteries carbon doping
HE Ze-qiang XIONG Li-zhi WU Xian-ming CHEN Shang
College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000,China;College of Che College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000,China
国际会议
北京
英文
227-228
2006-08-03（万方平台首次上网日期，不代表论文的发表时间）