The choice of a binder can greatly influence the electrochemical performance of lithium-ion batteries (LIBs), especially for silicon (Si) anodes. To systematically modulate the mechanical properties of binders and to investigate their impact on the electrochemical properties, we synthesize a series of random copolymers consisting of acrylic acid (AA) and n-butyl acrylate (n-BA) via reversible addition-fragmentation chain-transfer (RAFT) polymerization. The electrochemical properties of Si nanoparticle (SiNP) anodes prepared using copolymer binders exhibit a strong dependence on the relative composition of AA and n-BA. The incorporation of a moderate amount of n-BA (10–30 mol%) in the copolymer binder provides better cycling stability compared to a SiNP anode prepared using poly(acrylic acid) (PAA) binder. The binder containing 30 mol% of n-BA is further crosslinked by in-situ crosslinking using a variable amount of polyethylene glycol diglycidyl ether (PEGDE). The electrochemical properties (3050 mAh g⁻¹ in the 1st cycle and 40% capacity retention in the 100th cycle at 0.5 A g⁻¹) of a SiNP anode prepared using the crosslinked binder with 14 wt% of PEGDE show further improvement compared to those of a SiNP anode prepared using PAA binder (2310 mAh g⁻¹ and 32% capacity retention in the 100th cycle at 0.5 A g⁻¹).

粘合剂的选择会极大地影响锂离子电池（LIB）的电化学性能，尤其是对于硅（Si）阳极而言。为了系统地调节粘合剂的机械性能并研究其对电化学性能的影响，我们通过可逆的加成-断裂链转移合成了一系列由丙烯酸（AA）和丙烯酸正丁酯（n- BA）组成的无规共聚物。（RAFT）聚合。使用共聚物粘合剂制备的Si纳米颗粒（SiNP）阳极的电化学性能表现出对AA和n -BA相对组成的强烈依赖性。掺入适量的n与使用聚丙烯酸（PAA）粘合剂制备的SiNP阳极相比，共聚物粘合剂中的-BA（10–30 mol％）可提供更好的循环稳定性。含有30mol％的n -BA的粘合剂通过使用可变量的聚乙二醇二缩水甘油醚（PEGDE）原位交联而进一步交联。使用具有14 wt％PEGDE的交联粘合剂制备的SiNP阳极的电化学性能（在第一个循环中3050 mAh g ^-1和在0.5 A g ^-1的第100个循环中40％的容量保持率）与那些相比具有进一步的改善使用PAA粘合剂制备的SiNP阳极的重量（2310 mAh g ^-1和在0.5 A g ^-1的第100个循环中的容量保持率为32％）。