用于全固态锂电池的LiSiPON电解质薄膜的制备及电导性能研究

利用磁控溅射方法在N2气氛下制备出了LiSiPON电解质薄膜，研究了薄膜的结构、形貌和组成，着重探讨了薄膜中N含量对薄膜离子电导率的影响。随着N2分压的增加，薄膜中的N含量逐渐增加，0.53Pa时达到最大，超过此分压N含量又逐步下降。随着薄膜中N含量的增加，离子电导率提高，最大达10．4×10^-6S／cm（室温），这对固态电解质薄膜来说是足够了。为了测量电解质薄膜的电化学稳定性，组装了LiCoO2／LiSiPON／SnO2薄膜电池，显示出了良好的循环性能。

固态薄膜电解质LiSiPON和其性能研究

用0.5Li3PO4-0.5Li2SiO3为靶材,用射频磁控溅射的方法在N2气氛中制备了非晶结构的固态电解质LiSiPON薄膜。N和Si的引入提高了Li2O-P2O5体系的离子电导率,在室温时电解质薄膜的离子电导率为4.83×10-6S/cm。LiSiPON电解质薄膜与Pt的分解压为5.7V左右,是一种很有潜力的应用于全固态薄膜锂离子蓄电池的电解质材料。

LiSiPON固态薄膜电解质的结构和性能分析

以Li3PO4和Si3N4为靶材,利用离子束辅助沉积N离子流轰击法制备非晶结构的固态电解质LiSiPON薄膜.实验中,通过控制N2气和Ar气的流量比,调节薄膜的含氮量.利用X线衍射、X线能量色散谱仪和X线光电子能谱仪研究薄膜的结构和组织成分的变化,并通过电化学阻抗测试仪获得薄膜的离子电导率,研究不同氮氩比对LiSiPON薄膜结构、组成和电学性质的影响.结果表明:N2和Ar流量比为1∶1时,薄膜含氮量最高,离子电导率达到最大值,在室温时电解质薄膜的离子电导可达6.8×10-6S/cm,是一种有潜力应用于全固态薄膜锂离子电池的电解质材料.

Fabrication and electrochemical properties study of LiSiPON electrolyte films

The LiSiPON electrolyte films were prepared by magnetron sputtering method with different N2 working pressure. The structure, morphology, composition and the relationship between ionic conductivity and N content were studied in detail. The result showed that N content in the films depended on N2 partial pressure. With the N2 partial pressure increasing, N content increased firstly and gained a maximum values then decreased. N content in the LiSiPON films affected the ionic conductivity of the films. The ionic conductivity of the films increased with the N content increasing, and could reach a maximum value 10.4×10 -6 S/cm.