林产化学与工业2026，Vol.46Issue(4)：1-8,8.DOI:10.20195/j.issn.0253-2417.2025033
强韧大豆蛋白-明胶凝胶电解质的制备及其应用
Preparation and Applications of Soybean Protein-Gelatin Tough Gel Electrolyte
摘要
Abstract
Using soy protein isolate(SPI)and gelatin(GL)as raw materials,the Hofmeister effect triggered by zinc acetate(ZnAc2)was employed to achieve synergistic structural regulation,i.e.,inducing the formation of dense clusters of SPI particles as well as driving the salting-out and self-assembly of GL macromolecules into hydrophobic domains.Based on this dual-assembly mechanism,a robust SPI-GL gel electrolyte with a hierarchical composite structure featuring with a uniformly entangled hydrophobic network and a hydrogen-bonded crosslinking network was successfully constructed.Structural and performance analyses show that the SPI-GL-0.4 gel electrolyte(prepared with 0.4 g SPI and 2 g GL)exhibits optimal properties:fracture stress of 0.99 MPa,fracture strain of 504%,and fracture energy of 5 447.59 J/m2.Moreover,the hydration between inorganic salt ions introduced by the Hofmeister effect and water molecules endows the gel electrolyte with excellent anti-freezing performance,maintaining a high ionic conductivity of 4.60 mS/cm even at-40℃.Meanwhile,the SPI-GL-0.4 gel electrolyte demonstrates good adhesion to Zn metal(shear strength of 540.66 kPa,interfacial adhesion toughness of 129.4 J/m2),achieving favorable interfacial compatibility with Zn metal.The overpotential of the assembled Zn|SPI-GL-0.4|Zn cell remains stable during 100 h of cycling.The zinc-ion hybrid capacitor assembled with this gel electrolyte exhibits outstanding electrochemical performance(capacitance of 130.1 mA·h/g at25℃)and stable capacitive behavior at low temperatures.Specifically,the Zn|SPI-GL-0.4|AC hybrid capacitor delivers a capacitance of 22.1 mA·h/g,an energy density of 21 W·h/kg,and a power density of 326.8 W/kg at-40℃under a current density of 1 A/g.关键词
凝胶电解质/界面相容性/抗冻性能/混合电容器Key words
gel electrolyte/interfacial compatibility/anti-freezing property/hybrid capacitor分类
化学化工引用本文复制引用
李雨羲,王梓豪,南静娅,王春鹏..强韧大豆蛋白-明胶凝胶电解质的制备及其应用[J].林产化学与工业,2026,46(4):1-8,8.基金项目
国家自然科学基金资助项目(32301526) （32301526）
江苏省自然科学基金资助项目(BK20220213) （BK20220213）
江苏省生物质能源与材料重点实验室基本科研业务费项目(JSBEM-S-202210) （JSBEM-S-202210）
