A Hydrogen‐Bonded Dual‐Polymer Binder for Ultrafast Manufacturing of Volume‐Adaptive Silicon Anode Lithium‐Ion Battery

Efficient and scalable electrode manufacturing remains a critical challenge for advancing lithium‐ion battery (LIB) technologies. Herein, we report a dual‐function exothermic resin–poly(vinyl alcohol) (ER–PVA) binder system that enables rapid electrode processing and improved mechanical stability. The ER undergoes fast thermal curing at 180°C within 5 minutes, significantly reducing processing time compared with conventional drying protocols. Meanwhile, hydrogen bonding between the carboxyl groups in ER and the hydroxyl groups of PVA enhances electrode adhesion under rapid solvent evaporation, achieving an average peel force of 3.37 N, far exceeding that of the Si||poly(vinylidene fluoride) (PVDF) electrode (0.25 N). Consequently, the Si||ER–PVA electrode exhibits improved structural stability and superior electrochemical performance. Notably, the half cell employing the ER–PVA binder delivers a stable Coulombic efficiency of ∼98% over 100 cycles at 0.2 C and demonstrates good rate reversibility by recovering a capacity of 850.5 mAh g ⁻¹ at 0.1 C compared with 617.8 mAh g ⁻¹ for the conventional Si||PVDF cell under the same conditions. Meanwhile, the corresponding full cells retain 90.4% of its initial capacity after 50 cycles at 0.25 C. These results demonstrate the strong potential of this ER–PVA binder system for scalable LIB electrode manufacturing.