Electrochemical Behavior of Li<,3>V<,2> (PO<,4>)<,3>/C composite cathode material for Lithium-Ion Batteries
Monoclinic lithium vanadium phosphate, cathode material for lithium ion batteries, was synthesized by a low temperature route. NH<,4>VO<,3>, LiOH, (NH <,4>)<,2>HPO<,4>, and sucrose were used. as starting materials to prepare a precursor, and Li<,3>V<,2>(PO <,4>)<,3>/C composite was finally obtained by sintering the precursor at 700°C for 12 h. X-ray diffraction results show Li<,3>V<,2>(PO<,4>)<,3> sample is monoclinic structure. SEM image indicates that the size of particles of Li<,3>V <,2>(PO<,4>)<,3>/C composite are relatively small. The initial discharge capacities of Li<,3<V<,2>(PO<,4>)<,3>/C composite are 125mAhg<-1> in the voltage range of 3.0-4.3V (vs. Li/Li<+>) and 164 mAhg<-1> in the voltage range of 3.0-4.8V (vs. Li/Li<+>), respectively. The discharge capacity after 30 cycles at two voltage windows was held to be 122 and 142 mAhg<-1>, respectively.
Lithium-ion batteries Li<,3>V<,2> (PO<,4>)<,3>/C composite Li<,3>V<,2>(PO<,4>)<,3> Cathode material
Anping Tang Xianyou Wang Zhiming Liu Sergio Gamboa P. J. Sebastian
School of Chemistry, Xiangtan University, Hunan 411105, China School of Chemistry and chemical Engin School of Chemistry, Xiangtan University, Hunan 411105, China Solar-Hydrogen-Fuel Cell Group, CIE-UNAM, Temixco 62580, Morelos, Mexico
国际会议
第二届亚洲化学电源会议(Second Asian Conference on Electrochemical Power Sources)
上海
英文
41
2007-10-21（万方平台首次上网日期，不代表论文的发表时间）