CN-mayenite Ca12Al14O32(CN)2: Replacing mobile oxygen ions by cyanide ions

Alexander Schmidt; Martin Lerch; Jens Peter Eufinger; Jürgen Janek; Raimund Dolle; Hans Dieter Wiemhöfer; Ionut Tranca; Mazharul M. Islam; Thomas Bredow; Hans Boysen; Markus Hoelzel

doi:10.1016/j.solidstatesciences.2014.09.017

CN-mayenite Ca₁₂Al₁₄O₃₂(CN)₂: Replacing mobile oxygen ions by cyanide ions

Alexander Schmidt, Martin Lerch, Jens Peter Eufinger, Jürgen Janek, Raimund Dolle, Hans Dieter Wiemhöfer, Ionut Tranca, Mazharul M. Islam, Thomas Bredow, Hans Boysen, Markus Hoelzel

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

17 Citations (SciVal)

Abstract

CN-mayenite (Ca₁₂Al₁₄O₃₂(CN)₂) is a promising candidate for high-temperature CN^- conductivity in a solid due to its special structural features. It was prepared by a solidegas reaction. The transport processes were investigated by means of in situ high-temperature neutron diffraction, impedance spectroscopy and additional Hebbe-Wagner measurements. Diffusion pathways and activation energies were determined additionally by quantum-chemical calculations. Ca₁₂Al₁₄O₃₂(CN)₂ shows a surprisingly high ionic conductivity of σ = 1.4·10^-3 S/cm at 1173 K (E_a = 4.3 eV) and can be considered as first example of a new kind of solid anion conductor with a mobile molecular anion.

Original language	English
Pages (from-to)	69-78
Number of pages	10
Journal	Solid State Sciences
Volume	38
Early online date	2 Oct 2014
DOIs	https://doi.org/10.1016/j.solidstatesciences.2014.09.017
Publication status	Published - 31 Dec 2014

Funding

This work was supported by the German Science Foundation (DFG) within the collaborative project PAK 596 . The authors thank Dr. J.-D. Epping (TUB) for carrying out the NMR measurements.

Keywords

Cyanide ion conduction
Impedance spectroscopy
Mayenite
Neutron scattering
Quantum-chemical calculations

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

Access to Document

10.1016/j.solidstatesciences.2014.09.017

Cite this

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title = "CN-mayenite Ca12Al14O32(CN)2: Replacing mobile oxygen ions by cyanide ions",

abstract = "CN-mayenite (Ca12Al14O32(CN)2) is a promising candidate for high-temperature CN- conductivity in a solid due to its special structural features. It was prepared by a solidegas reaction. The transport processes were investigated by means of in situ high-temperature neutron diffraction, impedance spectroscopy and additional Hebbe-Wagner measurements. Diffusion pathways and activation energies were determined additionally by quantum-chemical calculations. Ca12Al14O32(CN)2 shows a surprisingly high ionic conductivity of σ = 1.4·10-3 S/cm at 1173 K (Ea = 4.3 eV) and can be considered as first example of a new kind of solid anion conductor with a mobile molecular anion.",

keywords = "Cyanide ion conduction, Impedance spectroscopy, Mayenite, Neutron scattering, Quantum-chemical calculations",

author = "Alexander Schmidt and Martin Lerch and Eufinger, {Jens Peter} and J{\"u}rgen Janek and Raimund Dolle and Wiemh{\"o}fer, {Hans Dieter} and Ionut Tranca and Islam, {Mazharul M.} and Thomas Bredow and Hans Boysen and Markus Hoelzel",

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T2 - Replacing mobile oxygen ions by cyanide ions

AU - Schmidt, Alexander

AU - Lerch, Martin

AU - Eufinger, Jens Peter

AU - Janek, Jürgen

AU - Dolle, Raimund

AU - Wiemhöfer, Hans Dieter

AU - Tranca, Ionut

AU - Islam, Mazharul M.

AU - Bredow, Thomas

AU - Boysen, Hans

AU - Hoelzel, Markus

PY - 2014/12/31

Y1 - 2014/12/31

N2 - CN-mayenite (Ca12Al14O32(CN)2) is a promising candidate for high-temperature CN- conductivity in a solid due to its special structural features. It was prepared by a solidegas reaction. The transport processes were investigated by means of in situ high-temperature neutron diffraction, impedance spectroscopy and additional Hebbe-Wagner measurements. Diffusion pathways and activation energies were determined additionally by quantum-chemical calculations. Ca12Al14O32(CN)2 shows a surprisingly high ionic conductivity of σ = 1.4·10-3 S/cm at 1173 K (Ea = 4.3 eV) and can be considered as first example of a new kind of solid anion conductor with a mobile molecular anion.

AB - CN-mayenite (Ca12Al14O32(CN)2) is a promising candidate for high-temperature CN- conductivity in a solid due to its special structural features. It was prepared by a solidegas reaction. The transport processes were investigated by means of in situ high-temperature neutron diffraction, impedance spectroscopy and additional Hebbe-Wagner measurements. Diffusion pathways and activation energies were determined additionally by quantum-chemical calculations. Ca12Al14O32(CN)2 shows a surprisingly high ionic conductivity of σ = 1.4·10-3 S/cm at 1173 K (Ea = 4.3 eV) and can be considered as first example of a new kind of solid anion conductor with a mobile molecular anion.

KW - Cyanide ion conduction

KW - Impedance spectroscopy

KW - Mayenite

KW - Neutron scattering

KW - Quantum-chemical calculations

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