离子液体修饰的MOFs在聚合物电解质中的应用  

Application of ionic liquid decorated MOFs in polymer electrolytes

作　　者：杨锦福 郭立升 孙松 薛照明[1] YANG Jin-fu;GUO Li-sheng;SUN Song;XUE Zhao-ming(School of Chemistry and Chemical Engineering,Anhui University,Hefei 230601,China)

机构地区：[1]安徽大学化学化工学院,安徽合肥230601

出　　处：《应用化工》2022年第9期2613-2617,共5页Applied Chemical Industry

基　　金：安徽省重点研发项目(006233172019)。

摘　　要：选用锂离子液体(Li-IL)填充金属有机框架材料(MOFs)中合成简单的MOF-5,形成离子导体Li-IL@MOF-5(LM)。将LM与PEO/PVDF结合,采用溶剂浇铸法制备用于锂离子电池的复合聚合物电解质(CPEs)。研究LM的含量在不同温度下对CPE的电化学及电池性能的影响。结合X-射线衍射光谱分析(XRD)、扫描电子显微镜(SEM)和差示扫描量热仪(DSC)对CPE进行形貌及结构分析;使用电化学工作站对CPE进行电化学性能表征;使用电池测试系统对CPE组装成的全固态锂离子电池进行电池性能表征。结果表明,当LM含量为40%时,该CPE在60℃时的离子电导率为3.65×10^(-4)S/cm,组装成的全固态锂离子电池在0.2 C下充电比容量达到149.8 mAh/g。Lithium-ion liquid(Li-IL)was used to synthesize simple MOF-5 in filled metal-organic frame materials(MOFs)to form an ionic conductor Li-IL@MOF-5(LM).LM is combined with PEO/PVDF to prepare composite polymer electrolytes(CPEs)for lithium-ion batteries using solvent pouring.To study the effects of LM content on the electrochemical and battery properties of CPE at different temperatures.The morphology and structure of CPEs were analyzed by X-ray diffraction spectroscopy(XRD),scanning electron microscopy(SEM)and differential scanning calorimetry(DSC),the electrochemical performance of the CPEs were characterized by the electrochemical workstation,and the battery performance of the all-solid-state lithium-ion batteries assembled from the CPEs was characterized by the battery test system.The results showed that when the LM content reached 40%,the ion conductivity of the CPE at 60℃was 3.65×10^(-4)S/cm,and the specific capacity of the assembled all-solid-state lithium-ion battery reached 149.8 mAh/g at 0.2 C.

关 键 词：锂离子电池 复合聚合物电解质 金属-有机框架材料 锂离子液体 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]