溶胶-凝胶法制备钠离子固态电解质Na3Zr2Si2PO12及其电导性能研究

doi:10.3724/SP.J.1077.2013.13120

无机材料学报 ›› 2013, Vol. 28 ›› Issue (11): 1255-1260.DOI: 10.3724/SP.J.1077.2013.13120

溶胶-凝胶法制备钠离子固态电解质Na₃Zr₂Si₂PO₁₂及其电导性能研究

章志珍^1,2, 施思齐^1,3, 胡勇胜², 陈立泉²

(1. 浙江理工大学材料与纺织学院, 杭州310018; 2. 中国科学院物理研究所, 北京100190; 3. 上海大学材料科学与工程学院, 上海 200444)

收稿日期:2013-03-05 修回日期:2013-05-10 出版日期:2013-11-20 网络出版日期:2013-10-18
作者简介:章志珍(1986-), 女, 硕士研究生. E-mail: zhangzhizhen1@126.com
基金资助:
国家高科技研究发展计划(2011AA11A235); 国家自然科学基金(51072183, 11005161, 11205249)

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

ZHANG Zhi-Zhen^1,2, SHI Si-Qi^1,3, HU Yong-Sheng², CHEN Li-Quan²

(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)

摘要/Abstract

摘要： 采用溶胶-凝胶法, 探索了合成纯相Na₃Zr₂Si₂PO₁₂的条件, XRD分析表明前驱体中Na和P 均过量10%时, 在1050℃下烧结得到了纯相的Na₃Zr₂Si₂PO₁₂, 而P不过量时, 得到的产物中含有少量的ZrO₂杂质。电化学阻抗谱测试表明Na和P 均过量10%时, 烧结得到的陶瓷片室温离子电导率达到了5.4×10^-4 S/cm, 比P不过量时烧结得到样品的离子电导率(室温时为3.7×10^-4 S/cm)要高。进一步分析可知高温下P的挥发造成ZrO₂杂质相的析出, 从而使得离子电导率降低。与固相法相比, 溶胶-凝胶法需要的烧结温度更低, 且制得的样品的离子传导性更好。

关键词: 固态电解质, 溶胶-凝胶法, 离子电导率, Na₃Zr₂Si₂PO₁₂

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

中图分类号:

TM912

章志珍, 施思齐, 胡勇胜, 陈立泉. 溶胶-凝胶法制备钠离子固态电解质Na₃Zr₂Si₂PO₁₂及其电导性能研究[J]. 无机材料学报, 2013, 28(11): 1255-1260.

ZHANG Zhi-Zhen, SHI Si-Qi, HU Yong-Sheng, CHEN Li-Quan. Sol-Gel Synthesis and Conductivity Properties of Sodium Ion Solid State Electrolytes Na₃Zr₂Si₂PO₁₂[J]. Journal of Inorganic Materials, 2013, 28(11): 1255-1260.

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溶胶-凝胶法制备钠离子固态电解质Na₃Zr₂Si₂PO₁₂及其电导性能研究

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

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