The coated LiNi0.5Mn1.5O2 particles not only exhibited water-resistant property but also showed no decrease in discharge capacity and only a small degradation of discharge rate performance. In addition, the coated LiNi0.5Mn1.5O2 particles, that were exposed to water-based binder solution for one week, exhibited the same charge/discharge cycle performance as observed for the cathode of the pristine LiNi0.5Mn1.5O4 particles, suggesting that the coated particles are promising as cathode materials with a water-resistant property and therefore water can be used as solvent for preparing the cathode slurry solution in the place of e.g., carcinogenic N-methyl-2-pyrrolidone which is used actually.
Actually, no coating is required anymore since the newest polymer binder BA-310C is generating the same electrochemical performance for a battery cell. BA-310C is a new eco-friendly non-toxic water-based binder for Li-ion Battery Cathode. It can deliver the most excellent adhesion to the active materials as well as the Aluminium foil. It will generate excellent flexibility for the electrodes which is good for cylindrical cell production. It also effectively solve the problem which frequently happens in electrode production such as powder-off, falling-off, and cracking, etc. The good mechanical stability, thermal stability, alkali resistance, and freeze-thaw stability make transportation and processing easier!