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High power nano-LiMnO cathode materials with high-rate pulse discharge capability for lithium-ion batteries

Chinese Physics B, ISSN: 1674-1056, Vol: 20, Issue: 2
2011
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Metrics Details

  • Citations
    19
    • Citation Indexes
      19
  • Captures
    26

Article Description

Nano-LiMnO cathode materials with nano-sized particles are synthesized via a citric acid assisted sol - gel route. The structure, the morphology and the electrochemical properties of the nano-LiMnO are investigated. Compared with the micro-sized LiMnO, the nano-LiMnO possesses a high initial capacity (120 mAh/g) at a discharge rate of 0.2 C (29.6 mA/g). The nano-LiMnO also has a good high-rate discharge capability, retaining 91% of its capacity at a discharge rate of 10 C and 73% at a discharge rate of 40 C. In particular, the nano-LiMnO shows an excellent high-rate pulse discharge capability. The cut-off voltage at the end of 50-ms pulse discharge with a discharge rate of 80 C is above 3.40 V, and the voltage returns to over 4.10 V after the pulse discharge. These results show that the prepared nano-LiMn O could be a potential cathode material for the power sources with the capability to deliver very high-rate pulse currents. © 2011 Chinese Physical Society and IOP Publishing Ltd.

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