Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Improved Rate Capability of Li/Li3V2(PO4)3 Cell for Advanced Lithium Secondary Battery

  • Lim, Hyun-He (Faculty of Applied Chemical Engineering, Chonnam National University) ;
  • Cho, A-Ra (Faculty of Applied Chemical Engineering, Chonnam National University) ;
  • Sivakumar, Nagarajan (Faculty of Applied Chemical Engineering, Chonnam National University) ;
  • Kim, Woo-Seong (Daejung EM Co. LTD.) ;
  • Yoon, Won-Sub (School of Advanced Materials Engineering, Kookmin University) ;
  • Lee, Yun-Sung (Faculty of Applied Chemical Engineering, Chonnam National University)
  • Received : 2011.02.10
  • Accepted : 2011.03.03
  • Published : 2011.05.20
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Abstract

Lithium vanadium phosphate, $Li_3V_2(PO_4)_3$ was prepared by a simple solid state route. It was found that making a fine powder of $Li_3V_2(PO_4)_3$ by the mechanical milling is very effective for increasing the insertion/extraction of lithium from $Li_3V_2(PO_4)_3$ structure. In charge/discharge test, the ball-milled $Li_3V_2(PO_4)_3$ sample exhibited a higher initial discharge capacity of 174 mAh/g in the voltage range of 3.0-4.8 V, compared with pure $Li_3V_2(PO_4)_3$ sample (152 mAh/g). Furthermore, the ball-milled $Li_3V_2(PO_4)_3$ presented not only higher cycle retention rate after 50 cycles, but also better rate capability compared with pure sample in the whole region (0.1-7 C).

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References

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