Integrated manufacturing of REciclable multi-material COmposites for the TRANSport sector

A series of biomass lignin?derived polymeric binders are developed for Li?S batteries via mimicking critical adhesive structures of mussel. Among these, Acidic amino acid phosphoserine grafted demethylated lignin eases the aggregation of lignin binder as well as bond active/conductive materials, endows the pouch cell with fast Li+ diffusion, high sulfur loading and an initial discharge capacity of 1.125 Ah.Bio?based binders exhibit outstanding advantages in maintaining electrode stability and suppressing the shuttle effect in lithium?sulfur (Li–S) battery. However, their inherent insulation and poor dispersion severely hinder Li+ transport within electrode, resulting in slow S reaction kinetics and low energy density. Here, a series of lignin?based ionic conductive binders (DAL?AA) were synthesized by mussel?mimicking demethylation and amino acids grafting modifications on alkali lignin (AL). It is found that acidic amino acids, e.g. phosphoserine, more easily restructure the spatial conformation via electrostatic repulsion and steric effect. It significantly eases the aggregation of lignin binder as well as bond active/conductive materials. Li+ diffusion coefficient in corresponding electrode improves 40% and lithium polysulfide conversion effectively accelerates. The Li–S battery delivers an initial discharge capacity of 971 mAh·g?1 at a current density of 0.5 C and can stably run 500 cycles. Moreover, the high?loading pouch cell with a capacity of 1.125 Ah achieves gravimetric and volumetric energy densities of 328 Wh·kg?1 and 517 Wh·L?1 respectively. This work provides guidance on designing high?loading cathodes for advanced Li–S batteries.

» Publication Date: 07/01/2026

» More Information

« Go to Technological Watch