journal6 ›› 2010, Vol. 31 ›› Issue (2): 89-93.

• Chemistry and chemical engineering • Previous Articles     Next Articles

Preparation and Electrochemical Properties of AlPO4-Coated LiNi1/3Co1/3Mn1/3O2


  1. (1.College of Chemistry and Chemical Engineering,Jishou University,Jishou  416000,Hunan China;2.College of Biology Resource and Environmental Sciences,Jishou University,Jishou 416000,Hunan China;3.School of Chemistry and Biological Engineering,Changsha University of Science and Technology,Changsha 410076,China)
  • Online:2010-03-25 Published:2012-04-18

Abstract: LiNi1/3Co1/3Mn1/3O2 was synthesized by high temperature solid state method,and AlPO4-coated LiNi1/3Co1/3Mn1/3O2 was prepared by sol-gel using LiNi1/3Co1/3Mn1/3O2,Al(NO3)3·9H2O and H3PO4 as raw material.The microstructure,surface morphology and electrochemical properties were characterized by various electrochemical methods in combination with X-ray diffraction (XRD) and scanning electron microscope (SEM).Results show that amorphous AlPO4 is coated on the surface in AlPO4-coated LiNi1/3Co1/3Mn1/3O2. AlPO4 can minimize the side reaction between electrode and electrolyte solution,reduce the surface film impedance and charge transferring impedance,and increase the diffusion vecocity of lithium ion.Thus,the cycling performance and rate performance of LiNi1/3Co1/3Mn1/3O2 are greatly improved.

Key words: LiNi1/3Co1/3Mn1/3O2, AlPO4, coating

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