文献类型：期刊文献

中文题名：抗冻大豆蛋白基凝胶电解质的制备及应用

英文题名：Preparation of Antifreezing Soybean Protein-based Gel Electrolytes and Application in Electrochemical Capacitors

作者：杨福生[1,2] 王定坤[1,2] 王发鹏[3] 刘美红[1,2] 南静娅[1,2] 王春鹏[1,2]

第一作者：杨福生

机构：[1]中国林业科学研究院林产化学工业研究所,江苏省生物质能源与材料重点实验室,国家林业和草原局林产化学工程重点实验室,林木生物质低碳高效利用国家工程研究中心,江苏南京210042;[2]南京林业大学江苏省林业资源高效加工利用协同创新中心,江苏南京210037;[3]杭州钢铁集团有限公司,浙江杭州310022

年份：2023

卷号：43

期号：2

起止页码：36-42

中文期刊名：林产化学与工业

外文期刊名：Chemistry and Industry of Forest Products

收录：CSTPCD;;Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2023_2024】；

基金：中国林业科学研究院中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2020GA001)。

语种：中文

中文关键词：凝胶电解质;抗冻性能;压缩回弹;耐疲劳强度;电容保持率

外文关键词：gel electrolyte;antifreezing performance;compression resilience;fatigue resistance;capacitance retention

分类号：TQ35

摘要：以大豆蛋白(SPI)、丙烯酰胺(AAm)和ZnCl_(2)为原料,热引发聚合制备了一种具备抗冻特性的大豆蛋白基凝胶电解质材料,探究了温度对材料离子电导率和力学性能的影响,并分析了其作用机制。研究结果表明:该凝胶电解质具有优异的抗冻性能,其中ZnCl_(2)的引入形成了大量Zn^(2+)的溶剂化结构,破坏了水分子间的氢键,降低了凝胶电解质的凝固点;凝胶基体和盐离子的协同作用赋予了凝胶电解质高压缩回弹性和耐疲劳强度。对凝胶电解质的低温离子电导率分析表明:ZnCl_(2)≥5 mol/kg,凝胶电解质在-30℃的低温下离子电导率仍有3.65×10^(-3) S/cm。对凝胶电解质的低温力学性能分析发现:凝胶电解质在-30℃下经历应变为80%的100次压缩循环后仍能保持结构完整,应力保持率>85%,塑性变形率为15%。同时,利用凝胶电解质组装的电化学电容器表现出良好的耐低温性能,电流密度5 A/g下,器件在-30℃下仍能够正常工作,其电容保持率达83.2%,在-30℃下经历10000次循环充放电电容保持率达92%。
An antifreezing soybean protein-based gel electrolyte was prepared by thermally induced polymerization using soybean protein(SPI),acrylamide(AAm)and ZnCl_(2)as raw materials.The effect of temperature on its ionic conductivity and mechanical property was investigated,and the mechanism was then analyzed.The results showed that the gel electrolyte had excellent frost resistance,and the introduction of ZnCl_(2)leaded to the formation of numerous Zn^(2+)solvation structures,which broke the hydrogen bonds among water molecules and reduced the freezing point of gel electrolyte.The synergistic effect of gel matrix and salt ions gave the gel electrolyte high compression resilience and fatigue resistance.The analysis of low-temperature ionic conductivity showed that when the ZnCl_(2)concentration exceeded 5 mol/kg,the ionic conductivity of gel electrolyte was still 3.65×10^(-3) S/cm at-30℃.The analysis of mechanical properties at low temperatures showed that the gel electrolyte could keep structural integrity after 100 compression cycles of 80%strain at-30℃,the stress retention remained more than 85%and the plastic deformation maintained 15%.At the same time,the gel electrolyte-based electrochemical capacitors assembled by gel electrolyte exhibited satisfied low-temperature resistance,which could work normally at-30℃and maintain capacitance retention of 83.2%.The capacitance retention reached 92%after 10000 cycles of charge and discharge at-30℃.