Synthesis and Electrochemical Performance of Highly Oriented Li-rich Cathode Material
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O646

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    Abstract:

    The high-oriented ternary precursors NixCoyMn1-x-y(OH)2 with a hexagonal morphology have been obtained via a hydrothermal method by using hexamethylenetetramine (HMT) as directing agent at different temperature. A NaCl/KCl molten salt method was used to calcine the highly oriented Li-rich cathode material. The results of XRD and SEM show that the obtained Li-rich material has a highly (003) orientation and good layer structure. The initial discharge capacity of the material is 282.5 mAh/g at rate 0.1C; When the rate changes to 1C, the discharge capacity decline to 178.8 mAh/g from 195.7 mAh/g after 30 cycles. When the rate changes to 2 C and 5 C, the discharge capacity respectively is 150.6 mAh/g and 110.0 mAh/g. The materials have good cycle stability and rate performance.

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History
  • Received:May 26,2014
  • Revised:August 04,2014
  • Adopted:August 28,2014
  • Online: October 29,2014
  • Published:
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