In this study, we systematically investigate the rheological behavior and microstructure formation of the anode slurries containing silicon (Si), carbon black (CB), and carboxymethyl cellulose (CMC) from the perspective of interactions between the constituent components, aiming to provide a fundamental understanding of the dispersion characteristics of Si-based anode slurries. The CMC adsorbs onto both particles (CB/Si) but has different effects on the inter-particle interactions (CB–CB and Si–Si). It stabilizes the CB particles through electro-steric interactions, whereas it agglomerates the Si particles through bridging interactions, in aqueous medium. In the meanwhile, the CMC selectively adsorbs onto CB particles among the two particles. Therefore, at a CMC content lower than the optimum graft density where CB particles are adsorbed and saturated by CMC, it acts as a dispersant in the slurries. However, at a higher content, the CMC that remains after adsorption on CB particles adsorbs onto Si particles and acts as a flocculant for the particles in the slurries. The origin of selective adsorption is understood in terms of the driving forces for adsorption and the surface energy analysis. We anticipate our findings provide a useful guideline for the Si slurry design in terms of its dispersion and contribute to the development of Si anode technology.

在本研究中，我们从组成成分之间相互作用的角度系统地研究了含有硅（Si）、炭黑（CB）和羧甲基纤维素（CMC）的阳极浆料的流变行为和微观结构形成，旨在提供基础知识。了解硅基阳极浆料的分散特性。CMC 吸附到两种颗粒 (CB/Si) 上，但对颗粒间相互作用（CB-CB 和 Si-Si）具有不同的影响。它通过电空间相互作用稳定 CB 颗粒，而在水介质中通过桥联相互作用聚集 Si 颗粒。同时，CMC选择性地吸附到两个颗粒中的CB颗粒上。所以，当CMC含量低于最佳接枝密度时，CB颗粒被CMC吸附并饱和，它在浆料中充当分散剂。然而，在较高含量时，吸附在CB颗粒上后残留的CMC会吸附在Si颗粒上，并充当浆料中颗粒的絮凝剂。选择性吸附的起源可以根据吸附驱动力和表面能分析来理解。我们预计我们的研究结果可为硅浆料的分散性设计提供有用的指导，并有助于硅阳极技术的发展。选择性吸附的起源可以根据吸附驱动力和表面能分析来理解。我们预计我们的研究结果可为硅浆料的分散性设计提供有用的指导，并有助于硅阳极技术的发展。选择性吸附的起源可以根据吸附驱动力和表面能分析来理解。我们预计我们的研究结果可为硅浆料的分散性设计提供有用的指导，并有助于硅阳极技术的发展。