Polysaccharides can be potential binder for lithium-ion batteries due to their strong adhesion through numerous hydroxyl groups. As a novel waterborne lithiated polysaccharide derivative, cellulose sulfate lithium (CSL) is successfully synthesized and used as the binder for LiFePO₄ (LFP) cathode. The chemical structure of CSL is verified by FTIR-ATR, XRD, C¹³-NMR, GPC, EA, ICP and TGA. Compared to LFP cathode using polyvinylidene difluoride binder, electrochemical measurements show that the LFP cathode using CSL (LFP-CSL) has lower polarization and better rate performance owing to higher lithium-ion conductivity of CSL. The result of morphological analysis indicates that CSL binder can maintain an integrated LFP cathode structure during hundreds of cycles. As a result, the LFP-CSL cathode exhibits a discharge capacity of 133.4 mAh g⁻¹ and maintains remarkable cycle stability with retention of 93.1 % after 300 cycles at 1C. These findings provide novel insights into the rational design of the binders for the LFP cathode.

由于多糖通过大量羟基具有很强的粘附性，因此可以成为锂离子电池的潜在粘合剂。作为一种新型水性锂化多糖衍生物，成功合成了硫酸锂纤维素 (CSL)，并将其用作 LiFePO ₄ (LFP) 正极的粘合剂。^{CSL的化学结构通过FTIR-ATR、XRD、C 13}验证-NMR、GPC、EA、ICP 和 TGA。与使用聚偏二氟乙烯粘合剂的 LFP 阴极相比，电化学测量表明，由于 CSL 具有更高的锂离子电导率，使用 CSL 的 LFP 阴极（LFP-CSL）具有更低的极化和更好的倍率性能。形态分析结果表明，CSL 粘合剂可以在数百次循环中保持完整的 LFP 正极结构。结果，LFP-CSL 阴极表现出 133.4 mAh g ^-1的放电容量，并保持显着的循环稳定性，在 1C 下循环 300 次后保留率为 93.1%。这些发现为 LFP 阴极粘合剂的合理设计提供了新的见解。