PVP溶胶-凝胶法制备锂稳定Na-β-Al2O3纳米粉体

doi:10.3724/SP.J.1077.2013.12695

无机材料学报 ›› 2013, Vol. 28 ›› Issue (9): 916-920.DOI: 10.3724/SP.J.1077.2013.12695

PVP溶胶-凝胶法制备锂稳定Na-β-Al₂O₃纳米粉体

张浩, 张高校, 吴相伟, 温兆银

(中国科学院上海硅酸盐研究所, 中国科学院能量转换材料重点实验室, 上海 200050)

收稿日期:2012-11-19 修回日期:2013-01-10 出版日期:2013-09-20 网络出版日期:2013-08-14
作者简介:张浩(1985-), 男, 博士. E-mail: zhanghao26704@163.com
基金资助:
国家自然科学基金(50730001); 国家重点基础研究发展规划项目(973) (2007CB209700)

Synthesis of Na-β-Al₂O₃ Nanopowders by PVP Sol-Gel Process

ZHANG Hao, ZHANG Gao-Xiao, WU Xiang-Wei, WEN Zhao-Yin

(CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China)

Received:2012-11-19 Revised:2013-01-10 Published:2013-09-20 Online:2013-08-14
About author:ZHANG Hao. E-mail: zhanghao26704@163.com
Supported by:
National Natural Science Foundation of China (50730001); National Key Basic Research Program of China (973) (2007CB209700)

摘要/Abstract

摘要： 作为钠硫电池陶瓷电解质的核心材料, Na-β-Al₂O₃粉体对钠硫电池的性能影响很大。实验以聚乙烯吡咯烷酮(PVP)为络合剂, 合成了纳米Na-β-Al₂O₃粉体。结果表明, 以PVP络合的前驱体形成Na-β-Al₂O₃相的温度低至900?℃, 相比于传统固相合成法及其他化学合成法有显著的降低, 可有效抑制传统制备Na-β-Al₂O₃粉体方法中由于高温而导致Na₂O组份的挥发, 从而避免Na-β-Al₂O₃性能的下降。X射线衍射、扫描电镜和透射电镜对粉体的分析表明, 所获得的粉体为纯相的Na-β-Al₂O₃, 粉体粒径60~70 nm, 分散性好。高分散性的纳米粉体有助于制备高致密度的Na-β-Al₂O₃陶瓷。这种粉体制备烧结的Na-β-Al₂O₃陶瓷的电导率在350℃可达0.22 S/cm。

关键词: PVP, 溶胶-凝胶, 纳米粉体, Na-β-Al₂O₃

Abstract: As the key material of the β-Al₂O₃ electrolyte of sodium sulfur battery(SSB), the properties of Na-β-Al₂O₃ powders play an important role in the performance of SSB. In this study, nanosized Na-β-Al₂O₃ powders were prepared by Sol-Gel process with polyvinyl pyrrolidone (PVP) as the chelating agent. The phase formation temperature of the Na-β-Al₂O₃by the PVP-based process was reduced to 900℃, which was much lower than those of conventional SSR and most chemical synthesis methods. The new method can effectively inhibit the performance decline of the Na-β-Al₂O₃ceramics induced by the volatilization of Na₂O at high temperature in the conventional method. The powders were characterized by XRD, SEM and TEM techniques. It was demonstrated that the phase was pure and the particles were well dispersed with diameter of 60-70 nm, which were helpful to the good performance of Na-β-Al₂O₃ ceramics. In addition, the conductivities of the Na-β-Al₂O₃ceramics sintered by the as-prepared powders were measured by AC impedance spectroscope and the evaluation of the spectra was carried out with increasing temperature from room temperature to 350℃. The electrical conductivity of the ceramics at 350℃ reached 0.22 S/cm.

Key words: PVP, Sol-Gel process, nano-powders, Na-β-Al₂O₃

中图分类号:

TQ174

张浩, 张高校, 吴相伟, 温兆银. PVP溶胶-凝胶法制备锂稳定Na-β-Al₂O₃纳米粉体[J]. 无机材料学报, 2013, 28(9): 916-920.

ZHANG Hao, ZHANG Gao-Xiao, WU Xiang-Wei, WEN Zhao-Yin. Synthesis of Na-β-Al₂O₃ Nanopowders by PVP Sol-Gel Process[J]. Journal of Inorganic Materials, 2013, 28(9): 916-920.

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PVP溶胶-凝胶法制备锂稳定Na-β-Al₂O₃纳米粉体

Synthesis of Na-β-Al₂O₃ Nanopowders by PVP Sol-Gel Process

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