In today's market, lithium-ion batteries are proving to be the most promising and effective rechargeable batteries. In the development of active materials with high energy density for batteries, the design of binders is a bottleneck technology, which produces an interconnected electrode structure. In this study, for developing lithium-ion batteries with high efficiency, the sulfonated copolymer was employed as an effective binder. In order to improve the performance of poly(vinylidene fluoride) (PVDF) as a binder for lithium-ion batteries (LIBs), sulfonated PVDF copolymer was prepared in this study using the atom transfer radical polymerization (ATRP) process. The influence of sulfonated PVDF binder on the electrochemical performances of LIBs was assessed using charge and discharge measurements, cycling performance up to 300 cycles, cycling voltammetry (CV), and electrochemical impedance spectroscopy (EIS) analysis. The investigation indicated decreased concentration polarization and improved lithiation and delithiation kinetics at high number of charge/discharge cycles for LiFePO₄ electrodes with sulfonated PVDF binders. The discharge capacity after 300 cycles was 90 mAh g⁻¹ with a capacity retention of 100% at 1C. As a result, the copolymer synthesized in this paper can be utilized to design next-generation polymer binders for high-efficiency LIBs.

在当今市场上，锂离子电池被证明是最有前途和最有效的可充电电池。在高能量密度电池活性材料的开发中，粘合剂的设计是一个瓶颈技术，它产生了相互连接的电极结构。在这项研究中，为了开发高效的锂离子电池，磺化共聚物被用作有效的粘合剂。为了提高聚偏二氟乙烯(PVDF)作为锂离子电池(LIBs)粘合剂的性能，本研究采用原子转移自由基聚合(ATRP)工艺制备了磺化PVDF共聚物。磺化 PVDF 粘合剂对 LIB 电化学性能的影响通过充电和放电测量、高达 300 次循环的循环性能、循环伏安法 (CV) 和电化学阻抗谱 (EIS) 分析。研究表明，在 LiFePO 的大量充电/放电循环下，浓差极化降低，锂化和脱锂动力学得到改善_{4 个}带磺化 PVDF 粘合剂的电极。300次循环后的放电容量为90 mAh g ^-1，在1C时容量保持率为100%。因此，本文合成的共聚物可用于设计用于高效 LIB 的下一代聚合物粘合剂。