Ti doping enhances performance of high Ni cathodes

January 19, 2020
Ti doping enhances performance of high Ni cathodes
(a) Rietveld refinement of Ti doped LiNi0.8Co0.2O2 ​ (b) Enhanced cyclability with Ti doping (c) schematics showing how doping effects at the cathode surface lead to improved performance. ​

Scientific Achievement

It is established that Ti doping of high Ni cathodes such as  LiNi0.8Co0.2O2 produces a disordered layered structure at the particle surfaces with enhanced exchange of Li+ and Ni2+. This leads to corrosion resistance and enhanced electrochemical performance.

Significance and Impact

The method of Ti-doping described in this study can lead to Li ion batteries with extended life and much improved performance.​

Research Details

  • The structure of Ti substituted LiNi0.8Co0.2O2 has been determined using neutron diffraction (ND).​
  • TEM verified the presence of the disordered layer on particle surfaces.​
  • ab inito calculations using ND results showed the structure to be stable on particle surfaces.​
  • Coin cells were used to verify the electrochemical

D. Kong, J. Hu, Z. Chen, et al., Adv. Energy Materials, 9, 41, 1901756 (2019)