Journal of Inorganic Materials ›› 2013, Vol. 28 ›› Issue (11): 1255-1260.DOI: 10.3724/SP.J.1077.2013.13120

• Research Paper • Previous Articles     Next Articles

Sol-Gel Synthesis and Conductivity Properties of Sodium Ion Solid State Electrolytes Na3Zr2Si2PO12

ZHANG Zhi-Zhen1,2, SHI Si-Qi1,3, HU Yong-Sheng2, CHEN Li-Quan2   

  1. (1. College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China; 2. Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; 3. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China)
  • Received:2013-03-05 Revised:2013-05-10 Published:2013-11-20 Online:2013-10-18
  • About author:ZHANG Zhi-Zhen. E-mail: zhangzhizhen1@126.com
  • Supported by:

    National High Technology Research and Development Program of China (2011AA11A235); National Natural Science Foundation of China (51072183, 11005161, 11205249)

Abstract: NASICON-structured Na3Zr2Si2PO12 was synthesized by a Sol-Gel approach. Phase-pure samples were successfully sintered at 1050℃ when adding 10% excessive Na and P in the precursors, while a small amount of ZrO2 impurity was detected without adding excessive phosphorus. Electrochemical impedance spectrum tests indicate that the ionic conductivity of the former is as high as 5.4×10-4 S/cm at room temperature, which is higher than that of samples prepared from the precursors without adding excessive phosphorus (3.7×10-4 S/cm). Further analysis reveals that the evaporation of phosphorus at high temperature would cause the formation of ZrO2 impurity in the samples, leading to a lower ionic conductivity. Compared with solid state reaction approach, samples with enhanced ionic conductivity can be obtained at a rather lower temperature by Sol-Gel synthesis.

Key words: solid state electrolytes, Sol-Gel synthesis, ionic conductivity, Na3Zr2Si2PO12

CLC Number: