Über die quasi‐binären Systeme NaNO2/Na2O und NaCN/Na2O. Phasendiagramme und Natrium‐Ionenleitung in Na3O(NO2) und Na3O(CN)

Jansen, Martin; Feldmann, Claus; Müller, Winfried

doi:10.1002/zaac.19926110502

Cited by 16 publications

(21 citation statements)

References 7 publications

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“…We noticed two previous reports on the ionic conductivity of antiperovskite Na 3 OBr and Na 3 OCN gave low values below their melting points [28,29]. In the present work, we demonstrated that both A-site size-mismatch substitution and unequivalent alkali-earth-metal doping could improve the ionic conducting performance remarkably.…”

Section: Sodium Ionic Conductivitysupporting

confidence: 48%

Structural manipulation approaches towards enhanced sodium ionic conductivity in Na-rich antiperovskites

Wang

Liu

et al. 2015

Journal of Power Sources

101

158

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h i g h l i g h t s g r a p h i c a l a b s t r a c tA series of Na-rich antiperovskites were developed as advanced solid electrolytes.The materials are nonflammable, low-cost and suitable for thermoplastic processing. Enhanced sodium ionic conductivity was achieved by structural manipulation approaches. The Na ionic conductivity of Na 2.9 Sr 0.05 OBr 0.6 I 0.4 reaches 1.9 Â 10 À3 S/cm at 200 C. a b s t r a c tHigh-performance solid electrolytes are critical for realizing all-solid-state batteries with enhanced safety and cycling efficiency. However, currently available candidates (sulfides and the NASICON-type ceramics) still suffer from drawbacks such as inflammability, high-cost and unfavorable machinability.Here we present the structural manipulation approaches to improve the sodium ionic conductivity in a series of affordable Na-rich antiperovskites. Experimentally, the whole solid solutions of Na 3 OX (X ¼ Cl, Br, I) are synthesized via a facile and timesaving route from the cheapest raw materials (Na, NaOH and NaX). The materials are nonflammable, suitable for thermoplastic processing due to low melting temperatures (<300 C) without decomposing. Notably, owing to the flexibility of perovskite-type structure, it's feasible to control the local structure features by means of size-mismatch substitution and unequivalent-doping for a favorable sodium ionic diffusion pathway. Enhancement of sodium ionic conductivity by 2 magnitudes is demonstrated by these chemical tuning methods. The optimized sodium ionic conductivity in Na 2.9 Sr 0.05 OBr 0.6 I 0.4 bulk samples reaches 1.9 Â 10 À3 S/cm at 200 C and even higher at elevated temperature. We believe further chemical tuning efforts on Na-rich antiperovskites will promote their performance greatly for practical all-solid state battery applications.

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Section: Sodium Ionic Conductivitysupporting

confidence: 48%

Structural manipulation approaches towards enhanced sodium ionic conductivity in Na-rich antiperovskites

Wang

Liu

et al. 2015

Journal of Power Sources

101

158

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“…In addition to recent work on Li-rich anti-perovskites Li 3 OX (X = Cl or Br), 19–23 there have been structural and conductivity studies of the sodium analogues Na 3 OX (X = Cl or Br), 24–35 as well as work on a range of other Na-rich anti-perovskites such as Na 3 ONO 2 and Na 3 OBH 4 . 36–51 In comparison to lithium, Na-ion batteries have the advantages of raw material abundance and reduced cost with possible use in large-scale grid storage applications. It is generally accepted that ion transport in Na-rich anti-perovskites takes place via Na-vacancy migration 27 as sodium vacancies seem to be the majority sodium defect species.…”

Section: Introductionmentioning

confidence: 99%

Atomic-scale investigation of cation doping and defect clustering in the anti-perovskite Na₃OCl sodium-ion conductor

et al. 2022

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“…The idea of LiRAPs can also be extended to the design of Na batteries with the development of a series of Na‐rich antiperovskites (NaRAPs) and intergrowth NaRAPs: Na 4 OI 2 and Na 3 SO 4 F . Larger Na + ions are better for stabilizing the antiperovskite structure, and hence, more NaRAPs are expected.…”

Section: Emerging Functionalities Of Antiperovskitesmentioning

confidence: 99%

Antiperovskites with Exceptional Functionalities

et al. 2019

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ABX3 perovskites, as the largest family of crystalline materials, have attracted tremendous research interest worldwide due to their versatile multifunctionalities and the intriguing scientific principles underlying them. Their counterparts, antiperovskites (X3BA), are actually electronically inverted perovskite derivatives, but they are not an ignorable family of functional materials. In fact, inheriting the flexible structural features of perovskites while being rich in cations at X sites, antiperovskites exhibit a diverse array of unconventional physical and chemical properties. However, rather less attention has been paid to these “inverse” analogs, and therefore, a comprehensive review is urgently needed to arouse general concern. Recent advances in novel antiperovskite materials and their exceptional functionalities are summarized, including superionic conductivity, superconductivity, giant magnetoresistance, negative thermal expansion, luminescence, and electrochemical energy conversion. In particular, considering the feasibility of the perovskite structure, a universal strategy for enhancing the performance of or generating new phenomena in antiperovskites is discussed from the perspective of solid‐state chemistry. With more research enthusiasm, antiperovskites are highly anticipated to become a rising star family of functional materials.

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Über die quasi‐binären Systeme NaNO₂/Na₂O und NaCN/Na₂O. Phasendiagramme und Natrium‐Ionenleitung in Na₃O(NO₂) und Na₃O(CN)

Cited by 16 publications

References 7 publications

Structural manipulation approaches towards enhanced sodium ionic conductivity in Na-rich antiperovskites

Structural manipulation approaches towards enhanced sodium ionic conductivity in Na-rich antiperovskites

Atomic-scale investigation of cation doping and defect clustering in the anti-perovskite Na₃OCl sodium-ion conductor

Antiperovskites with Exceptional Functionalities

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Über die quasi‐binären Systeme NaNO2/Na2O und NaCN/Na2O. Phasendiagramme und Natrium‐Ionenleitung in Na3O(NO2) und Na3O(CN)

Cited by 16 publications

References 7 publications

Structural manipulation approaches towards enhanced sodium ionic conductivity in Na-rich antiperovskites

Structural manipulation approaches towards enhanced sodium ionic conductivity in Na-rich antiperovskites

Atomic-scale investigation of cation doping and defect clustering in the anti-perovskite Na3OCl sodium-ion conductor

Antiperovskites with Exceptional Functionalities

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Über die quasi‐binären Systeme NaNO₂/Na₂O und NaCN/Na₂O. Phasendiagramme und Natrium‐Ionenleitung in Na₃O(NO₂) und Na₃O(CN)

Atomic-scale investigation of cation doping and defect clustering in the anti-perovskite Na₃OCl sodium-ion conductor