Synthesis and characterization of LiNi0.45Co0.10Mn0.45O2 cathode for lithium ion batteries
(1. School of Metallurgical Science and Engineering, Central South University,
Changsha 410083, China;
2. School of Materials Science and Engineering, Central South University,
Changsha 410083, China)
Changsha 410083, China;
2. School of Materials Science and Engineering, Central South University,
Changsha 410083, China)
Abstract: LiNi0.45Co0.10Mn0.45O2 was prepared from Li2CO3 and a triple oxide of nickel, cobalt and manganese at 950℃ in air. The structure and characteristics of LiNi0.45Co0.10Mn0.45O2 were determined by XRD, SEM and electrochemical measurements. The compound LiNi0.45Co0.10Mn0.45O2 has layered structure with hexagonal lattice.The individual particles are agglomeration of many little primary particles whose size ranges from 100nm to 200nm. The LiNi0.45Co0.10Mn0.45O2 cathode has excellent electrochemical performances with large reversible specific capacity of 142.5mA•h/g between 2.75V and 4.25V, and good capacity retention of 83.20% after 450 charge/discharge cycles. Capacity of the battery increases with enhancement of charge voltage limit, and a specific discharge capacity of 175.2mA•h/g is obtained when the charge voltage limit is fixed at 4.45V.
Key words: lithium ion battery; LiNi0.45Co0.10Mn0.45O2; cathode; capacity