Al2O3 decorated carbon nanotubes enhance Li-ion storage properties of LiNi0.8Co0.1Mn0.1O2

The LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode is susceptible to degradation due to the presence of trace amounts of HF generated from H 2 O interacting with the electrolyte salt LiPF 6 . In this work, Al 2 O 3 -decorated carbon nanotubes was introduced as a conductive additive to safeguard the LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode, resulting in a significant enhancement of its reversible capacity and cycling stability. The electrode incorporated of Al 2 O 3 /CNTs delivered an initial discharge capacity of 184.1 mAh g −1 at 200 mA g −1 under 1.0 C, and retained 65.6 % of its capacity at 100th cycle, outperforming traditional electrodes. The synthesis of Al 2 O 3 /CNTs involves only two straightforward steps: precipitation and heat treatment. Additionally, the amount of this additive occupies a mere 2.0 wt% of the overall electrode material, making it suitable for large-scale applications.