New Insights into Improving Rate Performance of Lithium‐Rich Cathode Material

Abstract
A Sn doping strategy is demonstrated to improve lithium diffusion kinetics by expanding the spacing of (003) planes without destroying the layered structure. A large (003) spacing will significantly decrease the energy barrier associated with lithium diffusion. Besides better rate capability, the Sn-doped material exhibits an unexpected much improved capacity above 3.0 V (vs Li+/Li), which is highly desired in future applications.
Funding Information
  • AIST and National Basic Research Program of China (2014CB921002, 2012CB921702)
  • Strategic Priority Research Program of the Chinese Academy of Sciences (XDB07030200)