Effect of TiO2-coating on the electrochemical performances of LiCo1/3Ni1/3Mn1/3O2

Feng Wu, Meng Wang, Yuefeng Su*, Shi Chen, Bin Xu

*Corresponding author for this work

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Abstract

A novel method to improve the cycling performance of LiCo1/3Ni1/3Mn1/3O2 in lithium-ion batteries by TiO2-coating with an in situ dipping and hydrolyzing method was presented in this work. The microstructure of the TiO2-coated LiCo1/3Ni1/3Mn1/3O2 was characterized by XRD, SEM and TEM, and their electrochemical performances were evaluated by EIS and galvonostatic charge-discharge test. SEM and TEM images show that the TiO2 are pasted on the surface of the LiCo1/3Ni1/3Mn1/3O2 with nano-size. The XRD patterns indicate that the crystal structure of the TiO2-coated LiCo1/3Ni1/3Mn1/3O2 shows no obvious change compares with the bare material. The TiO2-coated LiCo1/3Ni1/3Mn1/3O2 possesses improved cycle performance and rate capability. The capacity retention of 1.0 wt.% TiO2-coated material is more than 99.0% after 12 cycles at 3.0 C while that of the bare sample is only 86.6%. The capacity of coated material at 5.0 C remains 66.0% of the capacity at 0.2 C, while that of the bare LiCo1/3Ni1/3Mn1/3O2 is only 31.5%. Crown

Original languageEnglish
Pages (from-to)628-632
Number of pages5
JournalJournal of Power Sources
Volume191
Issue number2
DOIs
Publication statusPublished - 15 Jun 2009

Keywords

  • Cycling performance
  • LiCoNiMnO
  • Lithium-ion battery
  • TiO-coating

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Wu, F., Wang, M., Su, Y., Chen, S., & Xu, B. (2009). Effect of TiO2-coating on the electrochemical performances of LiCo1/3Ni1/3Mn1/3O2. Journal of Power Sources, 191(2), 628-632. https://doi.org/10.1016/j.jpowsour.2009.02.063