Partially lithiated ternary graft copolymers were synthesized through free radical graft polymerization of acrylic acid (AA), lithium acrylate (LiAA) and hydroxyethyl acrylate (HEA) onto polyvinyl alcohol (PVA). With optimized feeding molar ratio of AA/LiAA/HEA (2:1:2), the ternary graft copolymer with partial lithiation shows the best flexibility, elasticity and adhesion strength comparing to PVA‐g‐PAA and PVA‐g‐P(AA‐HEA) when used as aqueous binder for Si anode. The Si anode using PVA‐g‐P(AA‐LiAA‐HEA) with the optimized molar ratio of AA‐LiAA‐HEA exhibits better cycling stability and rate performance, delivering a capacity of 2265 mAh g⁻¹ with a capacity retention of 82.4% after 200 cycles at 1A g⁻¹. Even at a high current of 10 A g⁻¹, the Si electrode still obtained a high capacity of 1300 mAh g⁻¹.

中文翻译：

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具有增强弹性的部分锂化三元接枝共聚物，作为硅阳极的水性粘合剂

通过丙烯酸（AA），丙烯酸锂（LiAA）和丙烯酸羟乙酯（HEA）在聚乙烯醇（PVA）上的自由基接枝聚合反应，合成了部分锂化的三元接枝共聚物。通过优化的AA / LiAA / HEA进料摩尔比（2：1：2），与PVA-g-PAA和PVA-g-P（AA）相比，部分锂化的三元接枝共聚物显示出最佳的柔韧性，弹性和粘合强度‐HEA）用作Si阳极的水性粘合剂。使用PVA-g-P（AA-LiAA-HEA）和优化的AA-LiAA-HEA摩尔比的Si阳极具有更好的循环稳定性和倍率性能，可提供2265 mAh g ^-1的容量和82.4的容量保持率在1A g ^-1下200次循环后的％。即使在10 A g ^-1的大电流下，Si电极仍获得了1300mAh g ^-1的高容量。