Optimized Ni-Rich Lini0.83co0.06mn0.06al0.05o2 Cathode Material by Li1.3al0.3ti1.7(Po4)3 Fast Ion Conductor Coating for Lithium-Ion Batteries

The high nickel cathode LiNi0.83Co0.06Mn0.06Al0.05O2 (combination of NCM and NCA) coated by Li+ conductor Li1.3Al0.3Ti1.7(PO4)3 with various mass fractions were prepared via using the typical sol-gel process. And the LiNi0.83Co0.06Mn0.06Al0.05O2 after the Li1.3Al0.3Ti1.7(PO4)3 covering demonstrated the coherent subject crystal structure and the similar particles morphology in comparison with the bare cathode. The electrochemical test results indicated the superior rate capability and cycling performance were acquired for the coated cathodes due to the presence of the Li1.3Al0.3Ti1.7(PO4)3 film on the surface of LiNi0.83Co0.06Mn0.06Al0.05O2. Among the all samples, the 2wt.% Li1.3Al0.3Ti1.7(PO4)3 covered LiNi0.83Co0.06Mn0.06Al0.05O2 exhibited the greatest electrochemical performance with the large cycle retention rate of 90.9% for 300 cycles at 45oC, rate capacity of 139.8 mAh g-1 at 5C current density, high capability of 126.5 mAh g-1 at -30oC, superior than those (80.9%, 99.8 mAh g-1, 71.3mAh g-1 accordingly) of the bare cathode. In addition, the safety and environmental reliability tests of pouch batteries suggested the Li1.3Al0.3Ti1.7(PO4)3 film on the surface of cathode acted as a covering layer to promote the stability for application.