Journal of Inorganic Materials ›› 2022, Vol. 37 ›› Issue (2): 189-196.DOI: 10.15541/jim20210486

Special Issue: 【能源环境】超级电容器,锂金属电池,钠离子电池和水系电池(202312)

• RESEARCH ARTICLE • Previous Articles     Next Articles

Na3Zr2Si2PO12 Ceramic Electrolytes for Na-ion Battery: Preparation Using Spray-drying Method and Its Property

LI Wenkai, ZHAO Ning, BI Zhijie, GUO Xiangxin   

  1. College of Physical Sciences, Qingdao University, Qingdao 266071, China
  • Received:2021-08-04 Revised:2021-09-17 Published:2022-02-20 Online:2021-10-21
  • Contact: ZHAO Ning, assistant professor. E-mail: n.zhao@qdu.edu.cn; GUO Xiangxin, professor. E-mail: xxguo@qdu.edu.cn
  • About author:LI Wenkai(1996-), male, Master candidate. E-mail: 1594070907@qq.com
  • Supported by:
    National Natural Science Foundation of China (51771222, 22005163, 52002197); Taishan Scholars Program (ts201712035); Project of Qingdao Talents in Entrepreneurship and Innovation (193210zhc)

Abstract: Na-ion batteries, which currently use flammable and explosive organic electrolytes, now urgently need to develop high performance sodium ion solid electrolyte to realize more safe and practical application. Na3Zr2Si2PO12 is one of the most promising solid sodium electrolytes for its wide electrochemical window, high mechanical strength, superior air stability and high ionic conductivity. But its inhomogeneous mixing of the ceramic particles with the binders causing much more pores in the green bodies makes it difficult to obtain high-density and high-conductivity ceramic electrolytes after sintering. Herein, the spray drying method was used to enable Na3Zr2Si2PO12 particles uniformly coated with binders and granulated into spherical secondary ones. The as-prepared normal distributed particles can effectively contact each other and reduce porosity of ceramic green body. After sintering, Na3Zr2Si2PO12 ceramic pellets via the spray drying show relative density of 97.5% and ionic conductivity of 6.96×10-4 S∙cm-1 at room temperature. In contrast, the relative density and room-temperature ionic-conductivity of Na3Zr2Si2PO12 ceramic pellets prepared without the spray-drying are only 88.1% and 4.94×10-4 S∙cm-1, respectively.

Key words: solid electrolyte, spray-drying method, density, ionic conductivity, Na3Zr2Si2PO12

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