A multidimensional binary conductive agent on LiNi_0.5Co_0.2Mn_0.3O₂ battery performance

Any two superconductive carbon black Super-P (SP), carbon nanotubes (CNTs) and graphene (GN) in equal proportions were added into LiNi_0.5Co_0.2Mn_0.3O₂ to prepare button batteries to investigate the effect of a binary conductive agent on battery performance. Meanwhile, a single conductive agent, SP, was set as the control group. The structure of the conductive agent was analyzed by X-ray diffraction, and the morphology of the conductive agent was analyzed by scanning electron microscopy. In addition, the electrochemical properties of the battery were also tested. The battery with 3% GN/SP binary conductive agent has the highest first discharge specific capacity of 181.1 mAh/g. The cycle performance of the battery with 3% CNT/GN binary conductive agent is the best, and the capacity retention rate is 76.2% after 100 cycles at 0.2 C. The battery with 3% CNT/SP binary conductive agent has the best multiplier performance and the lowest impedance. The results show that the ability of the binary conductive agent to improve the battery performance is better than that of the signle conductive agent SP.