ScholarWorks@숙명여자대학교

초록

The influence of carboxymethyl cellulose (CMC) on the rheology, styrene–butadiene rubber (SBR) behavior, and interfacial adhesion of graphite-based anode slurries was systematically investigated. CMC content affected both graphite dispersion and the colloidal behavior of SBR particles. When the CMC content was low, adsorption on graphite improved dispersion and maintained low viscosity. In contrast, excess CMC in the continuous phase increased viscosity and was associated with depletion-driven aggregation of SBR particles. This aggregation likely reduced SBR mobility during drying and contributed to changes in binder redistribution within the anode coating. Cross-sectional image analysis revealed that low-viscosity slurries promoted SBR enrichment toward the anode surface, whereas a higher CMC content yielded a more uniform binder distribution and stronger adhesion to the copper current collector. These results indicate that both CMC content and the amount and concentration regime of free CMC in the aqueous phase strongly influence SBR aggregation and subsequent redistribution during drying, with corresponding changes in interfacial adhesion in aqueous graphite anode coatings.

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