Effect of niobium doping to enhance electrochemical performances of LiNi0.8Co0.1Mn0.1O2 cathode material

The Ni-rich layered LiNi0.8Co0.1Mn0.1O2 cathodes have high energy density and theoretical capacity, which can be used as a wide of energy storage applications. However, some challenges hinder their further commercialization due to its structural instability, resulting in severe capacity fade and voltage attenuation. In this work, the incorporation of Nb into the LiNi0.8Co0.1Mn0.1O2 cathode contributes to stabilize the surface/interfacial structure and reduce cation disordering thereby improving the electrochemical performances. Especially, Nb-doped LiNi0.8Co0.1Mn0.1O2 cathode shows the superior initial discharge capacity of 202.3 mAh g−1, excellent cycle stability of 90.6% at 0.1C after 100 cycles and the outstanding thermal stability. Therefore, the Nb doped LiNi0.8Co0.1Mn0.1O2 cathode can be regarded as an efficient approach for the improvement of Ni-rich cathode materials.