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Enhanced Electrochemical Performance of Zr-Modified Layered LiNi1/3Co1/3Mn1/3O2 Cathode Material for Lithium-Ion Batteries.

  • Academic Journal
  • ChemElectroChem; Jan2016, Vol. 3 Issue 1, p130-137, 8p
  • Zr-modified LiNi1/3Co1/3Mn1/3− xZr xO2 samples were prepared through a rheological-phase method. The results indicate that there is only partial Zr doping into the bulk phase of the LiNi1/3Co1/3Mn1/3O2 particles, whereas the rest of the Zr remained on the surface to form a Li2ZrO3 coating layer during the Zr-modification process. The Zr-modified LiNi1/3Co1/3Mn1/3− xZr xO2 samples show lower discharge specific capacities at low rates, however, which exhibit clearly improved rate capabilities than that of pristine LiNi1/3Co1/3Mn1/3O2. Among the Zr-modified LiNi1/3Co1/3Mn1/3− xZr xO2 samples, LiNi1/3Co1/3Mn1/3−0.01Zr0.01O2 ( x=0.01) shows the best rate capability, which exhibts158, 142, and 132 mAh g−1 at 1.0, 2.0, and 3.0 C, respectively. The related results indicate that the doped Zr in pristine LiNi1/3Co1/3Mn1/3O2 could improve the structure stability and the formation of an inactive Li2ZrO3 coating layer which could suppress the interfacial side reaction of LiNi1/3Co1/3Mn1/3O2. [ABSTRACT FROM AUTHOR]
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