Improved Performance as a Lithium-Ion battery Anode Material through Carbon Layer Coating and Li-Modification of Silicon Nanoskeleton Structure

초록

Electrophoretic deposition (EPD) is an emerging electrode fabrication method that enables uniform film formation while offering high flexibility in solvent systems and material design. In this study, an N-methyl-2- pyrrolidone (NMP)-free and binder-free EPD strategy for LiFePO4 (LFP) cathode fabrication, was aiming to overcome the environmental and electrochemical limitations of conventional slurry-based processes. Surface-modified aluminum current collectors featuring hierarchical tunnel architectures were integrated with acid-functionalized carbon nanotubes to improve particle dispersion, electrode cohesion and interfacial adhesion inthe absence of polymeric binders. As a result, binder-free LFP cathodes with mechanically robust architectures were successfully fabricated through the EPD process. Electrochemical tests showed that the EPD-prepared cathodes delivered higher reversible capacity and enhanced cycling stability compared with slurry-cast electrodes.