Solid phase synthesis and characterization of Na3Zr2−yNb0.8ySi2PO12 system

Li, Duanyang; Zhao, Jingzong

doi:10.1016/0167-2738(92)90350-x

Cited by 11 publications

(3 citation statements)

References 8 publications

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“…Among them, Na 3 Zr 2 Si 2 PO 12 ( x = 2) [H-NASICON] is the most well-known composition that shows a high ionic conductivity at room temperature. Typical ionic conductivity values are σ bulk (bulk ionic conductivity) = ∼6.8 × 10 –4 S/cm, and σ total (total ionic conductivity) = ∼3 × 10 –4 S/cm as shown in Table , , and some recent studies improved σ total up to ∼1 × 10 –3 S/cm using advanced synthesis methods. , The H-NASICON ceramic was reported to be stable in room-temperature seawater and used in the SWB as a solid electrolyte with a long cycle life . However, H-NASICON always contains a minor secondary phase of ZrO 2 (2–4 wt %), which has been reported to reduce ionic conductivity and mechanical strength. − …”

Section: Introductionmentioning

confidence: 99%

Investigation on the Structure and Properties of Na_3.1Zr_1.55Si_2.3P_0.7O₁₁ as a Solid Electrolyte and Its Application in a Seawater Battery

Kim

Pyo

et al. 2021

ACS Appl. Mater. Interfaces

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The ionic conductivity, bend strength, and electrochemical performance in a seawater battery (SWB) of an Na3.1Zr1.55Si2.3P0.7O11 (vA-NASICON) solid electrolyte were compared to those of Na3Zr2Si2PO12 (H-NASICON). vA-NASICON exhibited three times higher total ionic conductivity (8.6 × 10–4 S/cm) than H-NASICON (2.9 × 10–4 S/cm). This is due to the higher bulk ionic conductivity and lower grain boundary resistance of vA-NASICON. The higher bulk conductivity of vA-NASICON is a result of its higher Na content, leading to a larger concentration of charge carriers and/or the formation of a higher conductive rhombohedral phase. The lower grain boundary resistance of vA-NASICON is a result of its larger grain size and reduced ZrO2 content. The bend strength of vA-NASICON (95 MPa) was 30% higher than that of the H-NASICON ceramic. The higher bend strength of vA-NASICON was attributed to its reduced ZrO2 secondary phase (1.1 vol %) compared to that of H-NASICON (2.6 vol %). When the vA-NASICON ceramic was tested in the SWB as a solid electrolyte, an 8.27% improved voltage efficiency and 81% higher power output were demonstrated, compared to those of H-NASICON, as a result of its higher total ionic conductivity and mechanical strength. At the same time, the vA-NASICON membrane revealed comparable cycle life (1000 h) to that of H-NASICON. These results suggest that vA-NASICON can be a better alternative than H-NASICON for use in the SWB.

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Section: Introductionmentioning

confidence: 99%

Investigation on the Structure and Properties of Na_3.1Zr_1.55Si_2.3P_0.7O₁₁ as a Solid Electrolyte and Its Application in a Seawater Battery

Kim

Pyo

et al. 2021

ACS Appl. Mater. Interfaces

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“…Much attention has been paid to Na 1+x M 2−x N x P 3 O 12 (M = Ti, Ge or Hf, N = Al, In or Cr) [7][8][9] and Na 3+x Zr 2−x M x Si 2 PO 12 (M = Mg, Yb and Nb) [10][11][12] with crystalline phase structure. These systems exhibited excellent sodium ionic conductivity in the temperature range of 150-300 • C. However, the effects of high porosity and grain boundary, as well as the difficulties in obtaining the desired shapes of the sintered NASICON-type ceramics affected their practical use as solid electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Na+ ion conductors of glass–ceramics in the system Na1+xAlxGe2−xP3O12(0.3≤x≤1.0)

Zhang

Liu

et al. 2009

Journal of Alloys and Compounds

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“…To identify which NASICON compositions may have a higher probability of being interesting fast-ion conductors, we extracted the experimentally measured conductivity vs. Na content x for more than two hundred NASICONs from the literature and plot the result in Fig. 3A (19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(40)(41)(42)(43)(44)(45)(46)(47)(48)(49)(50)(51)(52)(53)(54)(55)(56)(57)(58)(59). In general, the conductivity increases with Na content until x ≈ 3.…”

Section: Experimental Validation Of the Predicted Na-rich Mixed-polya...mentioning

confidence: 99%

Synthetic accessibility and stability rules of NASICONs

Ouyang

Wang

et al. 2021

Nat Commun

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In this paper we develop the stability rules for NASICON-structured materials, as an example of compounds with complex bond topology and composition. By first-principles high-throughput computation of 3881 potential NASICON phases, we have developed guiding stability rules of NASICON and validated the ab initio predictive capability through the synthesis of six attempted materials, five of which were successful. A simple two-dimensional descriptor for predicting NASICON stability was extracted with sure independence screening and machine learned ranking, which classifies NASICON phases in terms of their synthetic accessibility. This machine-learned tolerance factor is based on the Na content, elemental radii and electronegativities, and the Madelung energy and can offer reasonable accuracy for separating stable and unstable NASICONs. This work will not only provide tools to understand the synthetic accessibility of NASICON-type materials, but also demonstrates an efficient paradigm for discovering new materials with complicated composition and atomic structure.

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Solid phase synthesis and characterization of Na3Zr2−yNb0.8ySi2PO12 system

Cited by 11 publications

References 8 publications

Investigation on the Structure and Properties of Na_3.1Zr_1.55Si_2.3P_0.7O₁₁ as a Solid Electrolyte and Its Application in a Seawater Battery

Investigation on the Structure and Properties of Na_3.1Zr_1.55Si_2.3P_0.7O₁₁ as a Solid Electrolyte and Its Application in a Seawater Battery

Na+ ion conductors of glass–ceramics in the system Na1+xAlxGe2−xP3O12(0.3≤x≤1.0)

Synthetic accessibility and stability rules of NASICONs

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Solid phase synthesis and characterization of Na3Zr2−yNb0.8ySi2PO12 system

Cited by 11 publications

References 8 publications

Investigation on the Structure and Properties of Na3.1Zr1.55Si2.3P0.7O11 as a Solid Electrolyte and Its Application in a Seawater Battery

Investigation on the Structure and Properties of Na3.1Zr1.55Si2.3P0.7O11 as a Solid Electrolyte and Its Application in a Seawater Battery

Na+ ion conductors of glass–ceramics in the system Na1+xAlxGe2−xP3O12(0.3≤x≤1.0)

Synthetic accessibility and stability rules of NASICONs

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Investigation on the Structure and Properties of Na_3.1Zr_1.55Si_2.3P_0.7O₁₁ as a Solid Electrolyte and Its Application in a Seawater Battery

Investigation on the Structure and Properties of Na_3.1Zr_1.55Si_2.3P_0.7O₁₁ as a Solid Electrolyte and Its Application in a Seawater Battery