Resilient binder network with enhanced ionic conductivity for High-Areal-Capacity Si-based anodes in Lithium-Ion batteries

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2023-10, Vol.473, p.145441, Article 145441
• Main Authors: Kim, Sungryong, Han, Dong-Yeob, Song, Gyujin, Lee, Junwoo, Park, Taiho, Park, Soojin
• Format: Article
• Language: English
• Subjects: High areal capacity; Lithium-ion batteries; Polymeric binder; Silicon-based anodes
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2023.145441

The rationally designed polymeric binder forms a highly stretchable network with fast self-healing ability on the Si anode which efficiently dissipates the stress of the electrode and recovers even upon significant damage. Moreover, the enhanced ionic conductivity of the binder enhances the diffusion coefficient of the Si electrode, realizing the high-rate operation of Si anodes (15 A/g). [Display omitted] •A resilient binder exhibits a high stretchability and fast self-healing property.•Si-PLSA75 demonstrates an 8 times higher Li-ion diffusivity than Si-PAA binder.•Si-PLSA75 anode delivers excellent rate capability and improved cycling stability.•Si-based electrode with a high areal capacity of 14.3 mAh cm−2 are well operated. Silicon (Si) anode is a promising candidate for increasing the energy density of lithium-ion batteries (LIBs) owing to its high theoretical capacity (4200 mAh g-1) and low reaction potential (