Enhanced ionic conductivity of Ce-doped Na_(3)Zr_(2)Si_(2)PO_(12) electrolyte for achieving superior performance of solid-state sodium batteries  

作　　者：Jiahui Liu Zhaoyue Xia Youli Chen Daiwen Tao Qilong Zhang 

机构地区：[1]School of Materials Science and Engineering,State Key Lab of Silicon and Advanced Semiconductor Materials,Zhejiang University,Hangzhou 310058,China

出　　处：《Journal of Advanced Ceramics》2025年第2期109-118,共10页先进陶瓷(英文)

基　　金：support from the National Natural Science Foundation of China(No.52272093);the“Pioneer”and“Leading Goose”R&D Program of Zhejiang Province(No.2022C01189).

摘　　要：Solid-state sodium batteries (SSSBs) are gaining significant attention for their potential in electrochemical energy storage. However, the development of SSSBs is hindered by the low ionic conductivity of sodium-ion solid electrolytes (SSEs). Herein, Ce with a relatively large ionic radius is employed to replace Zr in Na_(3)Zr_(2)Si_(2)PO_(12) (NZSP), aiming to increase the ionic conductivity of the SSEs. Through structural analysis and theoretical calculations, it is inferred that Ce doping is favorable for stabilizing phases with higher ionic conductivity, increasing the Na^(+) concentration via the substitution of Zr^(4+) with Ce^(3+), and facilitating the generation of a densified microscopic morphology. The Ce-doped NZSP achieves a high room-temperature conductivity of 2.08 mS·cm^(−1) and good interfacial compatibility with Na metal. Furthermore, the assembled Na_(3)V2(PO4)3 cell based on Ce-doped NZSP maintains a capacity of 111.18 mAh·g^(−1) at 0.5 C after 200 cycles, with a high retention of 98.06%.

关 键 词：solid electrolyte Na_(3)Zr_(2)Si_(2)PO_(12) Ce doping ionic conductivity solid-state battery 

分 类 号：TM912[电气工程—电力电子与电力传动]