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The Al-doped LiNi1/3Mn1/3Co1/3-xAlxO2(x=0, 0.01, 0.03, 0.05) cathode materials have been successfully synthesized via a simple template-sacrificial method with MnO2 as the sacrificial template. The structure and properties of the as-obtained samples were measured by XRD, SEM and electrochemical test methods. Though the Al-doped samples delivered lower initial capacities, the rate performance and the cycling stability were dramatically enhanced. By Al-doping and an advanced synthetic route, the LiNi1/3Co1/3Mn1/3O2 cathode materials have been improved. The doped material (x=0.03) has the most excellent electrochemical performances. It delivers an initial discharge capacity of 197.6 mAh g at 0.1 C in the voltage of 2.5-4.6 V, and has a capacity retention of 96.4% after 50cycles at 0.2 C.

international journal of electrochemical science

The Improvement for the Electrochemical Performances of LiNi1/3Co1/3Mn1/3O2 Cathode Materials for Lithium-ion Batteries by both the Al-doping and an Advanced Synthetic Method