干法NCM811极片的制备及性能研究OA

To achieve a fully solvent-free,drying-free and continuously producible dry electrode fabri-cation process,this study replaces the screw extruder with a turbine stirrer to successfully fabricate NCM811 dry electrodes.Systematic characterizations,including microstructural and electrochemical performance analyses,reveals that PTFE fiberization is more pronounced under directional shear forces,however,high-speed stirring induces agglomeration of the binder and conductive agent.This agglomeration reduces the degree of fiberization within the electrodes,necessitating a higher binder content that results in pore blockage and poor electrolyte wettability.Compared to wet electrodes,the dry electrodes exhibit significantly diminished rate capability;while wet electrodes can achieve a ca-pacity of 100 mAh/g at 2 C,the capacity of the dry electrodes is nearly zero under similar conditions.