| 초록 |
Silicon has great potential due to its high theoretical capacity. However, a significant volume change of the silicon during lithiation and delithiation causes pulverization in the anode, and thus becomes a major obstacle for commercialization. A potential way to solve this problem is to develop a new class of polymer binders that can alleviate volume change of silicon. In this study, we synthesized a series of poly(acrylic acid)-co-poly(n-butyl acrylate) with various compositions by RAFT polymerization. Thermal and mechanical properties of the binders were tailored by tuning the composition of copolymers. Interestingly, it was found that electrochemical performance of Si anode made from these binders showed the highest performance when the amount of soft n-butyl acrylate (10-30 mol%) was introduced to the rigid PAA. We also demonstrated that chemical crosslinking of the binder can further improve the initial discharge capacity and Coulombic efficiency. |
