A novel method to synthesize Li(3)V(2)(PO(4))(3)/C composite and its electrochemical Li intercalation performances

作者：Tang, Anping; Wang, Xianyou^*; Yang, Shunyi

来源：Materials Letters, 2008, 62(21-22): 3676-3678.

DOI：10.1016/j.matlet.2008.04.054

• Li3V2(PO4)3/C
• composite material
• cathode material

Monoclinic Li(3)V(2)(PO(4))(3)/C composite materials are synthesized from a sucrose-containing precursor by one-step heat treatment. As-prepared composites are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltarnmetric (CV) technology and charge/discharge measurement. XRD patterns show that Li(3)PO(4) impurity phase appears in the sample synthesized at 600 degrees C and pure Li(3)V(2)(PO(4))(3) samples can be obtained when the sintered temperature is higher than 700 degrees C. The sample synthesized at 700 degrees C presents the highest initial capacity of 170 mAh g(-1) (at C/5 rate), and exhibits better cycling stability (142 mAh g(-1) at 50th cycle at C/5 rate) and better rate capability (137 mAh g(-1) at 30th cycle under 1C rate) in the voltage range of 3.0-4.8 V.

• 出版日期2008-8-15
• 单位湖南科技大学; 湘潭大学