A facile method to enhance electrochemical performance of high-nickel cathode material Li(Ni_(0.8)Co_(0.1)Mn_(0.1))O_2 via Ti doping

摘要

The cycle stability of Li(Ni~(0.8)Co~(0.1)Mn~(0.1))O~(2)is enhanced obviously by titanium doping via a facile solid-state method. The property of crystal structure is evaluated by XRD, which illustrates the samples possessed a layered α-NaFeO~(2)structure with R-3m space group. According to the charge/discharge studies, the capacity retention of pristine sample is around 51% after 125 cycles at 5 C, and the sample with Ti dopant displays a good cyclic stability, after 125 cycles, the capacity retention increases to 75% under 5 C, suggesting it could be possibly applied in fast charge Lithium-ion battery area. The superb electrochemical performance might be attributed to the Ti_(4+)occupy the layer structure to broaden the Lithium-ion channel, which is benefit to lithium intercalation and deintercalation during cycling.