Na3Zr2(SiO4)2PO4 NASICON-type solid electrolyte: Influence of milling duration on microstructure and ionic conductivity mechanism. Issue 15 (1st August 2022)

• Record Type: Journal Article
• Authors: Chong, Man Kit; Zainuddin, Zalita; Omar, Fatin Saiha; Jumali, Mohammad Hafizuddin Hj
• Is Part Of: Ceramics international. Volume 48:Issue 15(2022)
• Page Start: 22147
• Page End: 22154
• Publication Date: 2022-08-01
• Subjects: Ionic conductivity -- Milling duration -- Na3Zr2(SiO4)2PO4 -- Solid electrolyte; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.04.202
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: NASICON-type Na3 Zr2 (SiO4 )2 PO4 (NZSP) has garnered increasing attraction as a solid electrolyte owing to its high thermal stability and ionic conductivity. In this study, NaH2 PO4 was selected as a new phosphate source to synthesize NZSP using solid-state reaction (SSR) method. The samples were ball-milled at different durations (i.e. 5, 12, 24 and 36 h) to study the effect of milling duration on their microstructure and conductivity properties. Structural and morphological studies revealed that the milling duration leads to the formation of different types of ZrO2 which have been the cause of the different ionic conductivities. Among all samples, NZSP ball-milled for 24 h achieved the highest maximum total (bulk + grain-boundary) ionic conductivity at room temperature (9.66 × 10 −4 S cm −1 ). The increment in ionic conductivity is contributed by the maximum amount of NASICON phase content and the least pore areas in the sample. The conductivity mechanism has been discussed, promising its potential to be employed as a solid electrolyte of sodium-ion battery. Highlights: Na3 Zr2 (SiO4 )2 PO4 solid electrolytes have been synthesized successfully using new phosphate source. The synthesized NZSP samples have NASICON-type crystal structure. Different milling duration has greatly influenced the microstructure and ionic conductivity mechanism. 24 h-milled NZSP samples displayed the highest total ionic conductivity.