Szczegóły publikacji
Opis bibliograficzny
Composite NASICON ($Na_{3}Zr_{2}Si_{2}PO_{12}$) solid-state electrolyte with enhanced $Na^{+}$ ionic conductivity: effect of liquid phase sintering / Jin An Sam Oh, Linchun He, Anna PLEWA, Masato Morita, Yue Zhao, Tetsuo Sakamoto, Xu Song, Wei Zhai, Kaiyang Zeng, Li Lu // ACS Applied Materials & Interfaces ; ISSN 1944-8244. — 2019 — vol. 11 iss. 43, s. 40125–40133. — Bibliogr. s. 40132–40133, Abstr. — Publikacja dostępna online od: 2019-10-08. — A. Plewa - pierwsza afiliacja: National University of Singapore
Autorzy (10)
- Oh Jin An Sam
- He Linchun
- AGHHanc Anna Florentyna
- Morita Masato
- Zhao Yue
- Sakamoto Tetsuo
- Song Xu
- Zhai Wei
- Zeng Kaiyang
- Lu Li
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 125795 |
|---|---|
| Data dodania do BaDAP | 2020-01-17 |
| Tekst źródłowy | URL |
| DOI | 10.1021/acsami.9b14986 |
| Rok publikacji | 2019 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | ACS Applied Materials & Interfaces |
Abstract
NASICON-type of solid-state electrolyte, Na3Zr2Si2PO12 (NZSP), is one of the potential solid-state electrolytes for all-solid-state Na battery and Na-air battery. However, in solid-state synthesis, high sintering temperature above 1200 °C and long duration are required, which led to loss of volatile materials and formation of impurities at the grain boundaries. This hampers the total ionic conductivity of NZSP to be in the range of 10-4 S cm-1. Herein, we have reduced both the sintering temperature and time of the NZSP electrolyte by sintering the NZSP powders with different amounts of Na2SiO3 additive, which provides the liquid phase for the sintering process. The addition of 5 wt % Na2SiO3 has shown the highest total ionic conductivity of 1.45 mS cm-1 at room temperature. A systematic study of the effect of Na2SiO3 on the microstructure and electrical properties of the NZSP electrolyte is conducted by the structural study with the help of morphological and chemical observations using X-ray diffraction (XRD), scanning electron microscopy, and using focused ion-beam-time of flight-secondary ion mass spectroscopy. The XRD results revealed that cations from Na2SiO3 diffused into the bulk change the stoichiometry of NZSP, leading to an enlarged bottleneck area and hence lowering activation energy in the bulk, which contributes to the increment of the bulk ion conductivity, as indicated by the electrochemical impedance spectroscopy result. In addition, higher density and better microstructure contribute to improved grain boundary conductivity. More importantly, this study has achieved a highly ionic conductive NZSP only by facile addition of Na2SiO3 into the NZSP powder prior to the sintering stage. © 2019 American Chemical Society.
