Title: Na3Zr2(SiO4)2PO4 NASICON-type solid electrolyte: Influence of milling duration on microstructure and ionic conductivity mechanism
Abstract: NASICON-type Na3Zr2(SiO4)2PO4 (NZSP) has garnered increasing attraction as a solid electrolyte owing to its high thermal stability and ionic conductivity. In this study, NaH2PO4 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.
Publication Year: 2022
Publication Date: 2022-04-27
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 18
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