电子元件与材料2025，Vol.44Issue(3)：237-243,7.DOI:10.14106/j.cnki.1001-2028.2025.1428
PVDF-LiNbO3复合固态电解质的制备及其在锂金属电池中的应用
Preparation of PVDF-LiNbO3 composite solid electrolyte and its application in lithium metal batteries
摘要
Abstract
In order to solve the problems of low ion conductivity and poor dendrite inhibition ability of PVDF solid polymer electrolyte,the ferroelectric material LiNbO3 with Li+transport ability was used as a filler to improve the performance of PVDF polymer solid electrolyte.PVDF-LiNbO3 composite solid electrolytes with different LiNbO3 contents were prepared by solution casting method,and their electrochemical performance was tested.The results show that with the addition of LiNbO3,the ionic conductivity of the electrolytes was significantly increased,the growth of Li dendrites was effectively inhibited,and the life of battery was extended.When LiNbO3 content is 10％(mass fraction),the composite solid electrolyte exhibits a high ionic conductivity of 6.1×104 S·cm-1 at room temperature,a wide electrochemical window of 4.5 V,and an increased critical current density of 1.8 mA·cm-2.The Li/Li symmetrical battery assembled with the composite electrolyte exhibits a stable cycle of more than 800 h and a low polarization voltage of less than 50 mV under the test conditions of 0.1 mA·cm-2 and 0.1 mAh·cm-2.The capacity retention rate of Li/NCM811 full cell assembled with the composite electrolyte is as high as 91.3％after stable cycling for about 400 cycles at 1C,showing excellent cycle performance.关键词
复合固态电解质/LiNbO3/溶液浇铸法/锂金属电池/铁电体Key words
composite solid electrolyte/LiNbO3/solution casting method/lithium metal battery/ferroelectric分类
动力与电气工程引用本文复制引用
张迪,李海涵,柳勇,任凤章..PVDF-LiNbO3复合固态电解质的制备及其在锂金属电池中的应用[J].电子元件与材料,2025,44(3):237-243,7.基金项目
河南科技大学研究生创新基金(2023-S09,2023-N20) （2023-S09,2023-N20）
