文献类型：期刊文献

中文题名：大豆蛋白-聚丙烯酰胺/复合盐抗冻凝胶电解质的制备及其应用

英文题名：Preparation and Application of Soybean Protein-Polyacrylamide/Composite Salt Anti-freezing Gel Electrolytes

作者：杨福生[1,2] 李雨羲[1,2] 王定坤[1,2] 詹洵[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

年份：2024

卷号：44

期号：1

起止页码：51-57

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2023】；CSCD:【CSCD2023_2024】；

基金：中国林科院中央级公益性科研院所基本科研业务费专项资金(CAFYBB2020GA001)。

语种：中文

中文关键词：凝胶电解质;抗冻性能;充放电性能;循环性能

外文关键词：gel electrolyte;anti-freezing performance;charge-discharge performance;cycling performance

分类号：TQ35

摘要：以大豆蛋白(SPI)、丙烯酰胺(AAm)、ZnCl_(2)、LiCl为原料,制备得到一种具备抗冻性能的大豆蛋白-聚丙烯酰胺复合盐(SPI-PAAm/ZnCl_(2)-LiCl)抗冻凝胶电解质,并将其应用到混合电容器中,考察器件在低温下的电化学性能。研究结果表明:ZnCl_(2)和LiCl的加入,破坏了凝胶电解质中水分子间氢键,并赋予凝胶电解质优异的低温离子电导率和较好的低温力学性能。当ZnCl_(2)与LiCl物质的量比为5∶12时,此条件下的抗冻凝胶电解质性能最优。在-70℃下,抗冻凝胶电解质经历100次应变为100%的循环拉伸测试仍保持结构完整,应力保持率>65%,塑性变形率<25%,能量损耗系数<0.35。基于此抗冻凝胶电解质的混合电容器在低温下仍具备良好的电化学性能,在-80℃下可以正常工作,低温环境下能量密度集中在50~200 Wh/kg,功率密度集中在1000~30000 W/kg,即便在-70℃下,混合电容器的功率密度接近1000 W/kg,能量密度>10 Wh/kg。同时,在-70℃下循环充放电5000次,电容保持率>94%,表现出优异的循环性能。
A soy protein-polyacrylamide composite salt(SPI-PAAm/ZnCl_2-LiCl) anti-freezing gel electrolyte with antifreeze performance was prepared using soybean protein(SPI),acrylamide(AAm),ZnCl_(2) and LiCl as raw materials,and it was applied to hybrid capacitors for the investigation of the electrochemical performance of hybrid capacitor at low temperature.The results of research showed that the addition of ZnCl_(2) and LiCl broke the hydrogen bonds among the water molecules in the gel electrolyte,and endowed the gel electrolyte with excellent low temperature ionic conductivity and good low temperature mechanical properties.When the molar ratio of ZnCl_(2) to LiCl was 5 ∶12,the performance of antifreeze gel electrolyte was the best.At-70 ℃,the anti-freezing gel electrolyte could maintain structural integrity after 100 tensile cycles under 100% strain,the stress retention rate was more than 65%,the plastic deformation rate was less than 25% and the energy loss coefficient was less than 0.35.The hybrid capacitor based on this anti-freezing gel electrolyte exhibited good electrochemical performance at low temperature,and could work normally at-80 ℃.At low temperature,the energy density was concentrated in the range of 50-200 Wh/kg,and the power density was concentrated in the range of 1 000-30 000 W/kg.Even at-70 ℃,the power density of the hybrid capacitor was nearly 1 000 W/kg and the energy density was more than 10 Wh/kg.Meanwhile,the capacitance retention rate of the hybrid capacitor was more than 94% after 5 000 cyclic charge and discharge at-70 ℃,indicating the excellent cycling performance.