Homogeneous particles of LiNi1/3Co1/3Mn1/3O2 were synthesized at 900C for 24h (LNCM-24H) based on the precursors formed in ethanol. Cyclic voltammetry (CVs) profiles of the sample LNCM-24H were recorded under various scan rates. The calculated diffusion coefficients of Li+ in solid-state electrode well explain the kinetic process of the oxidation/reduction reactions. Based on the simulated data of electrochemical impedance spectroscopy (EIS), Li+ diffusion through the electrode surface was relatively faster than that in the lattice of cathode material which present relative smaller Rf and RLi appear compared with W-R and W-T. The high capacitances CPE1P and CPE2P were attributed to positive charges that accumulated on the interfaces which involve the phase changes of Li+. The sample LNCM-24H worked at the cut-off voltage 4.4V exhibits an improved discharge capacity of 197.9mAhg− 1 at 0.1C, and can remain 95% capacity after 50 cycles. For the usage of energy storage device, the sample LNCM-24H presents very good in-situ electrochemical performance under various temperature and current rates. Under the cut-off voltage 4.4V, the sample LNCM-24H presents a high discharge capacity of 243mAhg−1 and very good cycleability after 50 cycles at 50C. Under a continuous changing temperature (range from 0 to 50C), higher and stable discharge capacity still remains.

Lithium Diffusion Behaviour and Improved High Rate Capacity of LiNi1/3Co1/3Mn1/3O2 as Cathode Material for Lithium Batteries. P.Gao, G.Yang, H.Liu, L.Wang, H.Zhou: Solid State Ionics, 2012, 207, 50-6