Abstract
The LiNi0.8Co0.1Mn0.1O2 cathode is susceptible to degradation due to the presence of trace amounts of HF generated from H2O interacting with the electrolyte salt LiPF6. In this work, Al2O3-decorated carbon nanotubes was introduced as a conductive additive to safeguard the LiNi0.8Co0.1Mn0.1O2 cathode, resulting in a significant enhancement of its reversible capacity and cycling stability. The electrode incorporated of Al2O3/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 Al2O3/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.
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