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Citation: HOU Chun-Ping, YUE Min. A Novel Cathode Material Lithium Vanadium Phosphate Synthesized by Liquid-phase Sphericizing Granulation[J]. Acta Physico-Chimica Sinica, ;2007, 23(12): 1954-1957. doi: 10.3866/PKU.WHXB20071223 shu

A Novel Cathode Material Lithium Vanadium Phosphate Synthesized by Liquid-phase Sphericizing Granulation

HOU Chun-Ping ,
YUE Min

1.
Shenzhen BTR New Energy Materials Inc., Shenzhen 518106, Guangdong Province, P. R. China

Received Date: 17 September 2007
Available Online: 7 November 2007

A novel cathode material lithium vanadium phosphate with the microstructure of submicro-particles aggregate was synthesized by liquid-phase sphericizing granulation. XRD pattern showed that the crystal structure of Li3V2(PO4)3 was monoclinic and belonged to P21/n space group. SEM revealed that the diameters of the particle and aggregated particle were in submicron range and about 10 滋m, respectively, with a narrowdistribution. The electrochemical testing showed that the obtained Li3V2(PO4)3 had the maximum discharge capacity of 126.67 mAh·g-1 and initial coulombic efficiency of 95.6%in the range of 3.0-4.3 V (vs Li/Li+), and 170.47mAh·g-1 and 97.5%in the range of 3.0-4.9 V (vs Li/Li+) at a density of 55.6 mA·g-1, respectively. Moreover, the material had a better cycle stability.
- Li-ion batteries; Cathode material; Lithiumvanadiumphosphate; Liquid-phase method; Sphericizing granulation
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