Modification of lithium intercalated sodium-based montmorillonite for efficient ionic conduction  

锂插层钠基蒙脱土改性用于高效离子传导

作　　者：GE Meng LIU Xin LI Bo LIU Qianqian CHEN Xinyu XIAO Lian ZHANG Ming WANG Shuhong ZANG Hongying 葛猛;刘欣;李波;刘倩倩;陈昕煜;肖莲;张明;王舒弘;臧宏瑛(国网吉林供电公司,吉林长春130024;东北师范大学化学学院,吉林长春130024)

机构地区：[1]State Grid Jilin Electric Power Co.,Ltd,Changchun 130024,China [2]Faculty of Chemistry,Northeast Normal University,Changchun 130024,China

出　　处：《分子科学学报》2024年第4期320-324,共5页Journal of Molecular Science

基　　金：supported by the National Natural Science Foundation of China(22322102);Science and Technology Project of State Grid Jilin Electric Power Co.,Ltd(2023-07).

摘　　要：Lithium-based montmorillonite(Li-MMT)was prepared by inorganic modification of sodiumbased montmorillonite(Na-MMT)using the ion-exchange method under microwave-enhanced conditions.The ionic conductivity of Li-MMT was explored at different temperatures,humidities,and exchange ratios.The results showed that the modified materials all exhibited temperature-and humidity-dependent changes in ionic conductivity.When the mass ratio of Na-MMT and anhydrous lithium chloride(LiCl)was 1∶1,Li-MMT exhibited excellent ionic conductivity,with an ionic conductivity of 9.81×10^(-5)S·cm^(-1)for Na-MMT at 40%RH(relative humidity)and 60℃,and ionic conductivity of 4.15×10^(-4)S·cm^(-1)for Li-MMT-1(exchange ratio of Na-MMT and anhydrous LiCl was 1∶1).This modification method is simple and inexpensive as well as provides an effective method to improve the electrical conductivity of Na-MMT.在微波强化条件下利用离子交换法对钠基蒙脱土(Na-MMT)进行无机改性,制备了锂基蒙脱土(Li-MMT)。在不同的温度、湿度、和交换比例下探索Li-MMT的离子导电率。结果表明,改性后材料均呈现随温度和湿度依赖性变化的离子导电率。当Na-MMT和无水氯化锂(LiCl)的质量比为1∶1时,Li-MMT具有优异的离子传导性能,在相对湿度40%,60℃下Na-MMT的离子电导率为9.81×10^(-5)S·cm^(-1),Li-MMT-1(Na-MMT和无水LiCl的交换比例为1∶1)的离子电导率为4.15×10^(-4)S·cm^(-1)。该改性方法简单易行,成本低廉,为提高Na-MMT的导电性提供了有效的方法。

关 键 词：MONTMORILLONITE inorganic modification ionic conductivity 

分 类 号：TB321[一般工业技术—材料科学与工程] TM862[电气工程—高电压与绝缘技术]