储能科学与技术2025，Vol.14Issue(10)：3705-3714,10.DOI:10.19799/j.cnki.2095-4239.2025.0223
Al2O3掺杂提升UV固化准固态电解质的电化学稳定性与离子传输性能
Enhancing the electrochemical stability and ion transport performance of UV-Cured quasi-solid-state electrolytes via Al2O3 doping
摘要
Abstract
Lithium-ion batteries(LIBs)are widely used in portable electronic devices,electric vehicles,and large-scale energy storage systems due to their high energy density,long cycle life,and environmental friendliness.However,conventional liquid electrolytes can promote lithium dendrite growth during cycling,leading to internal short circuits,accompanied by side reactions and interfacial instability-severely compromising both safety and longevity of LIBs.Polymer-based composite solid-state electrolytes have emerged as promising candidates for constructing high-safety lithium metal batteries.However,their conventional fabrication methods often require high-temperature or extended thermal curing processes,limiting their scalability and practical deployment.In this study,we present a novel UV-curing-based fabrication route for the rapid construction of a composite solid-state electrolyte membrane,denoted as OICSE-Al2O3-1,composed of ethoxylated trimethylolpropane triacrylate doped with aluminum oxide(Al2O3)nanoparticles.The experimental results reveal that the addition of Al2O3 effectively suppresses the formation of crystalline domains within the polymer matrix,thereby enhancing the ionic conductivity.Specifically,OICSE-Al2O3-1 achieves an ionic conductivity of 5×10-4 S/cm at 30℃,while also modulating the polymer chain alignment and optimizing the distribution of ion-conducting channels,which facilitates efficient lithium-ion transport(with a lithium-ion transference number tLi+of 0.66).Furthermore,the addition of Al2O3 broadened the electrochemical stability window to 5 V and significantly improved the cycling stability of the electrolyte.At a discharge rate of 0.5 C,OICSE-Al2O3-1 retained 89.3%of its initial capacity after 200 cycles.It also demonstrates stable lithium plating/stripping behavior over 1300 h at a current density of 200 μA/cm2.Moreover,this study presents an efficient,room-temperature fabrication strategy for quasi-solid-state electrolytes,extending their potential applications in advanced energy storage technologies.关键词
准固态电解质/锂金属电池/紫外光固化技术/电化学性能Key words
quasi-solid-state electrolyte/lithium metal battery/UV-curing technology/electrochemical performance分类
通用工业技术引用本文复制引用
易卓彦,庞鹏飞,黄亦聪,廖明杰,梁洪华,朱归胜,赵昀云,徐华蕊..Al2O3掺杂提升UV固化准固态电解质的电化学稳定性与离子传输性能[J].储能科学与技术,2025,14(10):3705-3714,10.基金项目
广西科技计划项目(桂科AD23023013、桂科AB23075218) （桂科AD23023013、桂科AB23075218）
桂林市科学研究与技术开发计划(20220120-1) （20220120-1）
桂林电子科技大学研究生教育创新计划项目(C24CLF08CL15). （C24CLF08CL15）
