A series of hydrogel alginate binders (M-alg, M = Al, Ba, Mn, Zn) for Si anode of lithium ion battery are synthesized by coordinating alginate molecule chains with different cations respectively. Among these binders, Al-alg and Ba-alg both present their Vickers hardness higher than 32.0 HV while other M-alg binders show Vickers hardness less than 25.5 HV. The Ba-alg binder exhibits a viscosity of 30270 mPa s while other M-alg binders only show their viscosities less than 1700 mPa s. The Si anodes with Al-alg or Ba-alg both deliver their capacities near 2100 mAh g⁻¹ after 300 cycles at 420 mA g⁻¹, while the electrodes with other M-alg binders show capacities less than 1500 mAh g⁻¹. When the current density is increased to 2100 mA g⁻¹ or the Si loading mass is increased to 1.0–1.2 mg cm⁻², the electrodes with Al-alg or Ba-alg still have remarkable advantages. Moreover, the ultrahigh viscosity makes Ba-alg strongly adhere with both Si and current collector, so when the electrodes are fabricated with a material mass ratio of 8:1:1 (Si: acetylene black: binder), the electrode with Ba-alg still delivers an outstanding capacity retention of 49.1% after 200 cycles at 840 mA g⁻¹.

通过将藻酸盐分子链与不同的阳离子配位，合成了锂离子电池硅阳极用的一系列水凝胶藻酸盐粘合剂（M-alg，M = Al，Ba，Mn，Zn）。在这些粘合剂中，Al-alg和Ba-alg均表现出高于32.0 HV的维氏硬度，而其他M-alg粘合剂则表现出小于25.5 HV的维氏硬度。Ba-alg粘合剂的粘度为30270 mPa s，而其他M-alg粘合剂的粘度仅小于1700 mPa s。具有Al-alg或Ba-alg的Si阳极在420 mA g ^-1下经过300次循环后均提供接近2100 mAh g ^-1的容量，而带有其他M-alg粘结剂的电极显示的容量小于1500 mAh g ^-1。当电流密度增加到2100 mA g ^-1时或将Si的负载质量提高到1.0–1.2 mg cm ^-2，使用Al-alg或Ba-alg的电极仍具有显着优势。此外，超高粘度使Ba-alg牢固地与Si和集电体粘附，因此，当电极的材料质量比为8：1：1（Si：乙炔黑：粘合剂）时，带有Ba-alg的电极在840 mA g ^-1的200个循环后，仍可提供49.1％的出色容量保持率。