Research and Evaluation of Cathode Dispersant for Improving the Performance of Lithium Ion Batteries

Various attempts have been made to increase the efficiency of the anode. In this way, in order to improve the battery performance of the cathode, the performance of not only the cathode material but also the materials used together has a great influence. Among them, a conductive material is needed to improve the performance of the battery by promoting the movement of electrons between active materials. Representative materials of such a conductive material are carbon black and carbon nanotubes (CNT). However, due to the characteristics of such a material, the dispersibility in the positive electrode slurry is poor, which is a limitation in improving battery efficiency. Therefore, this study was conducted to confirm the improvement of the dispersibility of the conductive material and the improvement of the battery performance through it. In the study, H-NBR, a representative anode dispersant, was used as a reference material by applying carbon nanotube (CNT), which has recently been increasingly used as a conductive material. The evaluation items were largely divided into the characteristics of the dispersant and the battery performance. The characteristics of the dispersant were viscosity, particle size, processability, dispersion stability, etc., and the battery characteristics could be confirmed through evaluation of LSV, CV, DC-IR, etc.