LATP固态电解质膜在准固态锂硫电池中的性能研究  

Performance study of LATP solid electrolyte membrane in quasi-solid-state lithium-sulfur batteries

作　　者：翁海瑞 王晨瑶 李明娟 孙陆毅 李媛 陈鑫智 WENG Hairui;WANG Chenyao;LI Mingjuan;SUN Luyi;LI Yuan;CHEN Xinzhi(Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus Materials,Kunming Yunnan 650500,China;Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming Yunnan 650500,China)

机构地区：[1]云南省磷化工节能与磷新材料重点实验室,云南昆明650500 [2]昆明理工大学化学工程学院,云南昆明650500

出　　处：《电源技术》2024年第8期1588-1594,共7页Chinese Journal of Power Sources

基　　金：国家自然科学基金(21968011);云南省基础研究项目(202101BE070001-014)。

摘　　要：为解决固态电解质与电极间的界面接触问题,实现锂硫电池固态化。用溶胶-凝胶法制备NASICON型Li_(1+x)Al_(x)Ti_(2−x)(PO_(4))_(3)氧化物固态电解质(LATP),用水基流延法制备固态电解质膜,将使用少量电解液润湿的LATP固态电解质膜组装成准固态锂硫电池。制备的LATP离子电导率为1.61×10^(−4)S/cm。在30℃下,Li对称电池可稳定循环,循环时间超过500 h。该准固态电池室温下5 C放电,放电比容量340 mAh/g。在30℃、0.1 C下,初始放电比容量1043 mAh/g,100次循环后放电比容量430 mAh/g。In order to solve the interfacial contact problem between solid-state electrolyte and electrode and realize the solid-state of lithium-sulfur battery,NASICON-type Li_(1+x)Al_(x)Ti_(2−x)(PO_(4))_(3) oxide solid-state electrolyte(LATP)was prepared by sol-gel method,solid-state electrolyte membrane was prepared by water-based tape casting method,and quasi-solid-state lithium-sulfur batteries were assembled by using a small amount of electrolyte-wetted LATP solid-state electrolyte membrane.The ionic conductivity of the prepared LATP was 1.61×10^(-4) S/cm,and the Li-symmetric battery could be stably cycled at 30℃for more than 500 h.The quasi-solid-state battery was discharged at room temperature with a discharge specific capacity of 340 mAh/g at 5 C.The initial discharge specific capacity of the quasi-solid-state battery is 1043 mAh/g at 30℃with 0.1 C.The discharge specific capacity of the quasi-solid-state battery is 430 mAh/g after 100 cycles.After 100 cycles,the specific capacity is 430 mAh/g.

关 键 词：锂硫电池 界面修饰 Li_(1+x)Al_(x)Ti_(2−x)(PO_(4))_(3) 水基流延 

分 类 号：TM912[电气工程—电力电子与电力传动]