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Increasing sinterability and ionic conductivity of Na3Zr2Si2PO12 ceramics by high energy ball-milling
被引：15
|作者：
Shindrov, Alexander A.
[1
]
机构：
[1] Russian Acad Sci, Inst Solid State Chem & Mechanochem, Siberian Branch, 18 Kutateladze, Novosibirsk 630090, Russia
基金：
俄罗斯科学基金会;
关键词：
Na3Zr2Si2PO12;
Mechanochemically assisted solid-state route;
High energy ball-milling;
Ionic conductivity;
Transference number;
SINTERING TEMPERATURE;
NASICON NA3ZR2SI2PO12;
SOLID-ELECTROLYTE;
SODIUM;
PHASE;
EXCESS;
MICROSTRUCTURE;
OPTIMIZATION;
PERFORMANCE;
STABILITY;
D O I：
10.1016/j.ssi.2022.116139
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ;
081704 ;
摘要：
Na3Zr2Si2PO12 (NZSP) is one of the most promising solid electrolytes for all-solid-state sodium-ion batteries. In this work, NZSP was obtained using the mechanochemically assisted solid-state route. The effect of high-energy ball milling (HEBM) on sintering and conductive properties of as-prepared NZSP was shown. It was mentioned that the polydisperse particle size distribution of HEBM samples has a positive effect on densification during the pressing, which enables using low pressure (10 MPa). High-density ceramics (3.14 g.cm(-3)) with high ionic conductivity (2.12.10(-3) S.cm(-1)) and low activation energy (0.31 eV) was obtained after 10 min of HEBM. The value of the electronic conductivity obtained from the analysis of DC polarization using blocking Au electrodes is equal to 4.85.10(-9) S.cm(-1). The NZSP ceramics shows stability during the charge-discharge process at a current density of 0.1 mA.cm(-2) for 200 h at room temperature. The transference number of Na+ ions is 0.95 and practically does not change during cycling. The high ionic conductivity, exceeding 10(-3) S.cm(-1), is confirmed by measuring ionic conductivity at AC and DC current.
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页数：10
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