PVDF-LiNbO 3 复合固态电解质的制备及其在锂金属电池中的应用

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关键词：复合固态电解质；LiNbO 3；溶液浇铸法；锂金属电池；铁电体

中图分类号： TM911.3

文献标识码：A

DOI：10.14106/j.cnki.1001-2028.2025.1428

引用格式：张迪， 李海涵， 柳勇， 等. PVDF-LiNbO 3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.

Reference format： ZHANG Di， LI Haihan， LIU Yong， et al. Preparation of PVDF-LiNbO 3composite solid electrolyte and its application in lithium metal batteries [J]. Electronic Components and Materials， 2025， 44（3）： 237-243.

Preparation of PVDF-LiNbO 3composite solid electrolyte and its

application in lithium metal batteries

ZHANG Di 1， LI Haihan 1， LIU Yong 1， REN Fengzhang 2

（1. School of Materials Science and Engineering， Henan University of Science and Technology， Luoyang 471023，

Henan Province， China; 2. Collaborative Innovation Center for New Non-Ferrous Metal Materials and Advanced Processing

Technology， Luoyang 471023， Henan Province， China）

Abstract： In order to solve the problems of low ion conductivity and poor dendrite inhibition ability of PVDF solid polymer electrolyte， the ferroelectric material LiNbO 3with Li +transport ability was used as a filler to improve the performance of PVDF polymer solid electrolyte. PVDF-LiNbO 3composite solid electrolytes with different LiNbO 3contents were prepared by solution casting method， and their electrochemical performance was tested. The results show that with the addition of LiNbO 3， 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 LiNbO 3content is 10% （mass fraction）， the composite solid electrolyte exhibits a high ionic conductivity of 6.1×10 -4S·cm -1at 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 -2and 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.

Keywords： composite solid electrolyte; LiNbO 3; solution casting method; lithium metal battery; ferroelectric

随着新能源汽车的快速发展以及便携式电子设备的快速更新换代，人们对高能量密度和高安全性的二次电池的需求与日俱增。（剩余11601字）