Practical application of a Si anode in a high-energy-density battery cannot be achieved due to the huge volume expansion of these anodes. Researchers have focused on binders of the anode to restrict volume expansion in order to address this issue, as the hydrogen bonds and mechanical properties of binders can be used to enhance adhesion and accommodate the volume changes of a Si anode. Herein, we comprehensively consider binders’ hydrogen bonds, mechanical properties, stability, and compatibility with the electrolyte solution, and design an ether-/ester-/fluorine-rich composite polymer, named P(TFEMA-co-IBVE). The proposed binder formula possesses outstanding stability, adhesion, and mechanical strength; moreover, it can accommodate the dramatic volume changes of a Si electrode and exhibits excellent electrochemical performance, achieving a high areal capacity of about 5.4 mA∙h∙cm⁻². This novel polymer design may be applied to other electrode materials in the next generation of lithium-ion batteries.

由于这些阳极的巨大体积膨胀，无法实现硅阳极在高能量密度电池中的实际应用。为了解决这个问题，研究人员专注于阳极粘合剂以限制体积膨胀，因为粘合剂的氢键和机械性能可用于增强附着力并适应硅阳极的体积变化。在此，我们综合考虑粘合剂的氢键、力学性能、稳定性以及与电解质溶液的相容性，设计了一种富醚/酯/氟的复合聚合物，命名为P(TFEMA- co-IBVE)。所提出的粘合剂配方具有出色的稳定性、附着力和机械强度；^{此外，它可以适应硅电极剧烈的体积变化并表现出优异的电化学性能，实现了约5.4 mA∙h∙cm −2}的高面积容量。这种新颖的聚合物设计可能会应用于下一代锂离子电池中的其他电极材料。