电子元件与材料2025，Vol.44Issue(7)：751-759,9.DOI:10.14106/j.cnki.1001-2028.2025.0127
BTO-醋酸纤维素复合准固态电解质的性能探究
Performance of BTO-cellulose acetate composite based quasi-solid-state electrolyte
摘要
Abstract
Solid-state lithium metal batteries are regarded as the next-generation high-energy-density batteries.However,the inorganic solid electrolytes within them have problems such as low ionic conductivity,poor interfacial performance,and high production costs,which seriously impede their commercial application.In this study,cellulose acetate was used as the polymer matrix,and barium titanate powder(BTO),an inorganic filler,was introduced to prepare a composite quasi-solid-state electrolyte.BTO exhibits excellent dielectric properties.It weakens the Coulomb interaction between Li+and anions in the lithium salts through the polarization effect,so the dissociation of the lithium salts was promoted.Significantly,the smaller the BTO particle size,the larger the specific surface area and the more remarkable the surface polarization phenomenon,which can effectively inhibit BTO agglomeration.Thus,a BTO-cellulose acetate composite quasi-solid-state electrolyte(CLB-X QSE)with excellent performance was prepared.The conductivity of the CLB-X QSE reaches 9.77× 10-4 S·cm-1 at 30 ℃.It has excellent interfacial stability and can stably cycle for more than 2500 h at room temperature.Meanwhile,for the LiFePO4/CLB-100-LiPF6/Li battery,when the current density is 0.2C,the capacity retention rate can still reach 97.59％after 200 cycles.This high-performance and low-cost quasi-solid-state electrolyte provides new ideas for the development of the new-generation energy storage devices.关键词
BTO/醋酸纤维素/准固态电解质/介电性能/界面稳定性Key words
BTO/cellulose acetate/quasi-solid-state electrolyte/dielectric properties/interfacial stability分类
信息技术与安全科学引用本文复制引用
吴海宁,徐华蕊,蒋坤朋,赵昀云,朱归胜..BTO-醋酸纤维素复合准固态电解质的性能探究[J].电子元件与材料,2025,44(7):751-759,9.基金项目
广西科技基地和人才专项(桂科AD23023013) （桂科AD23023013）
桂林市科学研究与技术开发计划项目(20220120-1) （20220120-1）
