Advanced Performances of Full Concentration Gradient Li[Ni0.65Co0.08Mn0.27]O2 Cathode Materials for Lithium Ion Batteries

Tuesday, October 13, 2015
West Hall 1 (Phoenix Convention Center)
D. W. Jun (Department of Energy Engineering, Hanyang University), K. J. Park, B. B. Lim, C. S. Yoon (Hanyang University), and Y. K. Sun (Hanyang University)
Full concentration gradient (FCG) cathode material which consists of Ni-rich core Li[Ni0.89Co0.01Mn0.10]O2 and Ni-less outer layer Li[Ni0.61Co0.09Mn0.30]O2 was synthesized by co-precipitation method.1,2 A gradually changing concentration gradients for Ni, Co, and Mn extended from the core to the surface within a single cathode particle with an average composition of Li[Ni0.65Co0.08Mn0.27]O2. We have evaluated electrochemical and thermal properties of the FCG cathode material and compared it with the conventional cathode (CC) material, Li[Ni0.65Co0.08Mn0.27]O2 without the concentration gradient. The BET surface area measurement demonstrated the presence of high-density primary particles in the FCG cathode material. The FCG cathode exhibited higher discharge capacity, excellent cycle retention and superior thermal stability compared to the CC Li[Ni0.65Co0.08Mn0.27]O2 cathode material.1


1. H.-J. Noh, Z. Chen, C. S. Yoon, J. Lu, K. Amine, and Y.-K. Sun, Chem. Mater., 25, 2109 (2013).

2. M. H. Lee,Y. J. Kang, S. T.Myung, andY. K. Sun, Electrochim. Acta. 50, 939 (2004).