Publications before 2015

2014

(72.) Order vs disorder – huge increase of Li conductivity in nanocrystalline LiAlO₂ embedded in an amorphous-like matrix of lithium aluminate, D. Wohlmuth, V. Epp, P. Bottke, I. Hanzu, B. Bitschnau, I. Letovsky-Papst, M. Kriechbaum, H. Amenitsch, F. Hofer, M. Wilkening, J. Mater. Chem. A 2 (2014) 20295.

(71.)  Lithium Distribution in Monocrystalline Silicon-based Lithium-Ion Batteries, R. Janski, M. Fugger, M. Sternad, M. Wilkening, ECS Trans. 62 (2014) 247.

(70.)  Enhancing Photoinduced Electron Transfer Efficiency of Fluorescent pH-probes with Halogenated Phenols, D. Aigner, S. Freunberger, M. Wilkening, R. Saf, S. Borisov, I. Klimant, Anal. Chem. 86 (2014) 9293.

(69.) Short-range Li diffusion vs long-range ionic transport in nanocrystalline lithium peroxide Li₂O₂ — the discharge product in lithium-air batteries, A. Dunst, V. Epp, I. Hanzu, S. Freunberger, M. Wilkening, Energy Environ. Sci. 7 (2014) 2739.

(68.)  Evidence of low-dimenional ion transport in mechanosynthesized, nanocrystalline BaMgF₄, F. Preishuber-Pflügl, M. Wilkening, Dalton Transact. 43 (2014) 9901.

(67.) "Ionic liquids-in-salt" - A promising concept to design electrolytes for high-temperature lithium batteries, M. J. Marczewski, B. Stanje, I. Hanzu, M. Wilkening, P. Johansson, Phys. Chem. Chem. Phys. 16 (2014) 12341.

(66.) Novel amino propyl substituted organo tin compounds, J. Pichler, A. Torvisco, P. Bottke, M. Wilkening, F. Uhlig, Can. J. Chem. 92 (2014) 565.

(65.) Correlated F diffusion and ionic conduction in the nanocrystalline solid electrolyte Ba_0.6La_0.4F_2.4  - ¹⁹F T_1rho NMR relaxation vs conductivity spectroscopy, F. Preishuber-Pflügl, P. Bottke, V. Pregartner, B. Bitschnau, and M. Wilkening, Phys. Chem. Chem. Phys. 16 (2014) 9580.

(64.)  A DFT study of the role of Al³⁺ in the fast ion-conductor Li_7-3xAl³⁺_xLa₃Zr₂O₁₂ garnet, D. Rettenwander, P. Blaha, R. Laskowski, K.-H. Schwarz, P. Bottke, M. Wilkening, C. A. Geiger, and G. Amthauer, Chem. Mater. 26 (2014) 2617.

(63.)  Li ion dynamics in TiO₂ anodes with an ordered hierarchical pore structure: Insights from ex situ Li NMR spectroscopy, P. Bottke, Y. Ren, I. Hanzu, P.G. Bruce, M. Wilkening, Phys. Chem. Chem. Phys. 16 (2014) 1894.
 

2013

(62.)  Li⁺ motions in nano-engineered LiBH₄ and LiBH₄:Al₂O₃ – comparisons with the microcrystalline form, V. Epp, M. Wilkening, ChemPhysChem, 14 (2013) 3706.

(61.)  Li motion in the anode material LiC₆ as seen via time-domain ⁷Li NMR, J. Langer, V. Epp, P. Heitjans, F. A. Mautner, M. Wilkening, Phys. Rev. B 88 (2013) 094304.

(60.)  Highly Mobile Ions: Low Temperature NMR Directly Probes Extremely Fast Li⁺ Hopping in Argyrodite-type Li₆PSe₅Br, V. Epp, O. Gün, H.-J. Deiseroth, M. Wilkening, J. Phys. Chem. Lett., 4 (2013) 2118.

(59.)  Two-dimensional diffusion in Li_0.7NbS₂ as directly probed by frequency-dependent ⁷Li NMR , V. Epp, S. Nakhal, M. Lerch, M. Wilkening, J. Phys.: Condens. Matter 25 (2013) 195402.

(58.)  Long-range Li dynamics in the lithium argyrodite Li₇PSe₆ as probed by rotating-frame spin-lattice relaxation NMR, V. Epp, O. Gün, H.-J. Deiseroth, M. Wilkening, Phys. Chem. Chem. Phys. 15 (2013) 7123.

(57.)  Ultraslow Li exchange processes in diamagnetic Li₂ZrO₃ studied by 2D EXSY NMR, P. Bottke, D. Freude, M. Wilkening, J. Phys. Chem. C 117 (2013) 8114.

(56.)  Towards a lattice-matching solid-state battery: synthesis of a new class of lithium-ion conductors with the spinel structure, F. Rosciano, P. P. Pescarmona, K. Houthoofd, A. Persoons, P. Bottke, M. Wilkening, Phys. Chem. Chem. Phys. 15 (2013) 6170.

(55.)  Mechanochemical reactions and syntheses of oxides, V. Šepelák, A. Düvel, M. Wilkening, K. D. Becker, P. Heitjans, Chem. Soc. Rev. 42 (2013) 7507.

(54.)  Low-temperature synthesis, characterization and stability of spinel-type Li₂NiF₄ and solid-solutions Li₂Ni_1-xCo_xF₄, J. Kohl, S. Nakhal, N. Ferro, P. Bottke, M. Wilkening, T. Bredow, P. Heitjans, M. Lerch, Z. Allg. Anorg. Chem. 639 (2013) 326.

2012

(53.)  Insight into Li Ion Migration Pathways in α-Li₃VF₆: A First Principles Investigation, M. Islam, M. Wilkening, P. Heitjans, T. Bredow, J. Phys. Chem. Lett. 3 (2012) 3120.

(...)  Extremely slow Li dynamics in monoclinic metatitanate Li₂TiO₃ — probing macroscopic jump diffusion via ⁷Li NMR stimulated echoes, B. Ruprecht, M. Wilkening, R. Uecker, P. Heitjans, Phys. Chem. Chem. Phys. 14 (2012) 11974.

Mechanosynthesis of solid electrolytes for lithium-ion batteries — Li ion transport properties of garnet-type Al-doped Li₇La₃Zr₂O₁₂, A. Düvel, A. Kuhn, L. Robben, M. Wilkening, P. Heitjans, J. Phys. Chem. C 116 (2012) 15192.

Synthesis of ternary transition metal fluorides Li₃MF₆ via a sol-gel route as candidates for cathode materials in lithium-ion batteries, J. Kohl, D. Wiedemann, S. Nakhal, P. Bottke, N. Ferro, T. Bredow, E. Kemnitz, M. Wilkening, P. Heitjans, M. Lerch, J. Mater Chem. 22 (2012) 15819.

Studying Li ion dynamics in a gas-phase synthesized amorphous oxide by NMR and impedance spectroscopy, V. Epp, C. Brüning, M. Binnewies, P. Heitjans, M. Wilkening, Z. Phys. Chem. 226 (2012) 513.

Li ion dynamics in Al-doped garnet-type Li₇La₃Zr₂O₁₂ crystallizing with cubic symmetry, A. Kuhn, S.-Y. Choi, L. Robben, F. Tietz, M. Wilkening, P. Heitjans, Z. Phys. Chem. 226 (2012) 525.

Macroscopic and microscopic Li transport parameters in cubic garnet-type Li_6.5La_2.5Ba_0.5ZrTaO₁₂ as probed by NMR and impedance spectroscopy, S. Narayanan, V. Epp, M. Wilkening, V. Thangadurai, RSC Adv. 2 (2012) 2553.

From Micro to Macro: Access to Long-Range Li+ Diffusion Parameters in Solids via Microscopic ^6,7Li Spin-Alignment Echo NMR M. Wilkening, P. Heitjans, Chem. Phys. Chem. 13 (2012) 53.

NMR relaxometry as a versatile tool to study Li dynamics in potential battery materials, A. Kuhn, M. Wilkening, P. Heitjans, Solid State Nucl. Magn. Reson. 42 (2012) 2.

Spin-Alignment Echo NMR: Probing Li⁺ hopping motion in the solid electrolyte Li₇La₃Zr₂O₁₂ with garnet-type tetragonal structure, A. Kuhn, V. Epp, G. Schmidt, S. Narayanan, V. Thangadurai, M. Wilkening, J. Phys.: Condens. Matter. 24 (2012) 035901.

2011

Mixed alkaline-earth effect in the metastable anion conductor Ba_1-xCa_xF₂ (0 ≤ x ≤ 1): Correlating long-range ion transport with local structures revealed by ultrafast ¹⁹F MAS NMR, A. Düvel, B. Ruprecht, Paul Heitjans, and M. Wilkening, J. Phys. Chem. C 115 (2011) 23784.

Mechanically induced phase transformation of gamma-Al₂O₃ into α-Al₂O₃ — Access to structurally disordered gamma-Al₂O₃ with a controllable amount of penta-coordinated Al sites, A. Düvel, E. Romanova, M. Sharifi, D. Freude, M. Wark, P. Heitjans, and M. Wilkening, J. Phys. Chem. C 115 (2011) 22770.

Structure and dynamics of the fast lithium ion conductor "Li₇La₃Zr₂O₁₂", H. Buschmann, J. Dölle, S. Berendts, A. Kuhn, P. Bottke, M. Wilkening, P. Heitjans, A. Senyshyn, H. Ehrenberg, A. Lottnyk, V. Duppel, L. Kienle, J. Janek, Phys. Chem. Chem. Phys. 13 (2011) 19378.

Li NMR spectroscopy on crystalline Li₁₂Si₇: experimental evidence for aromaticity of the planar cyclopentadienyl-analogous Si-rings, A. Kuhn. P. Sreeraj, R. Pöttgen, H.-D. Wiemhöfer, M. Wilkening, P. Heitjans, Angew. Chem. Intern. Ed. 50 (2011) 12099.

Access to metastable complex ion conductors via mechanosynthesis: Preparation, microstructure and conductivity of (Ba,Sr)LiF₃ with inverse perovskite structure, A. Düvel, S. Wegner, K. Efimov, A. Feldhoff, P. Heitjans, M. Wilkening, J. Mater. Chem. 21 (2011) 6238.

Li Ion Diffusion in the Anode Material Li₁₂Si₇ – Ultrafast Quasi-1D Diffusion and Two Distinct Fast 3D Jump Processes Separately Revealed by ⁷Li NMR Relaxometry, A. Kuhn, P. Sreeraj, R. Pöttgen, H.-D. Wiemhöfer, M. Wilkening, P. Heitjans, J. Am. Chem. Soc. 113 (2011) 11018.

Mechanosynthesized BiFeO₃ Nanoparticles with Highly Reactive Surface and Enhanced Magnetization, K. L. Da Silva, D. Menzel, A. Feldhoff, C. Kübel, M. Bruns, A. Paesano, A. Düvel., M. Wilkening, M. Ghafari, H. Hahn, F. J. Litterst, P. Heitjans, K. D. Becker, V. Sepelak, J. Phys. Chem. C 115 (2011) 7209.

Li self-diffusion in garnet-type Li₇La₃Zr₂O₁₂ as probed directly by diffusion-induced ⁷Li spin-lattice relaxation NMR spectroscopy, A. Kuhn, S. Narayanan, L. Spencer, G. Goward, V. Thangadurai, M. Wilkening, Phys. Rev. B. 83 (2011) 094302.   

Ion conduction and dynamics in mechanosynthesized nanocrystalline BaLiF₃, A. Düvel, M. Wilkening, S. Wegner, A. Feldhoff, V. Sepelak, P. Heitjans, Solid State Ion. 184 (2011) 65.

2010

Time-Resolved and Site-Specific Insights into Migration Pathways of Li⁺ in α-Li₃VF₆ by ⁶Li 2D Exchange MAS NMR, M. Wilkening, E. Romanova, S. Nakhal, D. Weber, M. Lerch, P. Heitjans, J. Phys. Chem C 114 (2010) 19083.

Mechanosynthesized nanocrystalline BaLiF₃: The impact of grain boundaries and structural disorder on ionic transport, A. Düvel, M. Wilkening, R. Uecker, A. Feldhoff, P. Heitjans, Phys. Chem. Chem. Phys. 12 (2010) 11521.

Proton Conductivity of Ordered Mesoporous Materials Containing Aluminium, M. Sharifi, R. Marschall, M. Wilkening, M. Wark, J. Power Sources 195 (2010) 7781.

Fast Li diffusion in crystalline LiBH₄ due to reduced dimensionality: Frequency-dependent NMR spectroscopy, V. Epp and M. Wilkening, Phys. Rev. B 82 (2010) 020301.

Ultra-slow Li ion dynamics in Li₂C₂ – On the similarities of results from ⁷Li spin-alignment echo NMR and impedance spectroscopy, B. Ruprecht, H. Billetter, U. Ruschewitz, M. Wilkening, J. Phys.: Condens. Matter 22 (2010) 245901.

2009

Li intercalation and anion/cation substitution of transition metal chalcogenides: effects on crystal structure, microstructure, magnetic properties and Li ion mobility, 
W. Bensch, T. Bredow, H. Ebert, P. Heitjans, S. Indris, S. Mankovsky,  M. Wilkening, J. Progr. Solid State Chem. 37 (2009) 206.

Ion dynamics at Interfaces: NMR Studies, P. Heitjans, M. Wilkening, Mat. Res. Bul. 34 (2009) 915.

Ionic Transport in Mechanosynthesized Nanocrystalline LiBaF₃, A. Düvel, M. Wilkening, P. Heitjans, Diffusion Fundamentals (extend. abstract) 11 (2009) 46.

Li Diffusion in Li₂Ti₃O₇ Probed by ⁷Li Stimulated Echo NMR, J. Heine, M. Wilkening, P. Heitjans, Diffusion Fundamentals (extend. abstract) 11 (2009) 47.

Li diffusion properties of mixed conducting LixTiO₂-B nanowires, M. Wilkening, J. Heine, C. Lyness, A. R. Armstrong, P. G. Bruce, Phys. Rev. B  80 (2009) 064302.

Li Conductivity of Nanocrystalline Li₄Ti₅O₁₂ Prepared by a Sol-Gel Method and High-Energy Ball Milling, W. Iwaniak, J. Fritzsche, M. Zukalová, R. Winter, M. Wilkening and P. Heitjans, Def. Diff. Forum 289-292 (2009) 565.

High anion conductivity in a ternary non-equilibrium phase of BaF₂ and CaF₂ with mixed cations, B. Ruprecht, M. Wilkening, A. Feldhoff, S. Steuernagel, P. Heitjans, Phys. Chem. Chem. Phys. 11 (2009) 3071.

Mechanically induced decrease of the Li conductivity in an alumosilicate glass, A. Kuhn, M. Wilkening, P. Heitjans, Solid State Ion. 180 (2009) 302.

Diffusion in Confined Dimensions: Li Transport in Nanocrystalline TiO₂-B Nanowires, M. Wilkening, C. Lyness, A. R. Armstrong, P. G. Bruce, J. Phys. Chem. C (Letter), 113 (2009) 4741.

Diffusion in Nanocrystalline Ion Conductors Studied by Solid State NMR and Impedance Spectroscopy, P. Heitjans, M. Wilkening, Def. Diff. Forum 283-286 (2009) 705.

2008

Anion diffusivity in highly conductive nanocrystalline BaF₂:CaF₂ composites prepared by high-energy ball milling, B. Ruprecht, M. Wilkening, S. Steuernagel, P. Heitjans, J. Mater. Chem. 18 (2008) 5412.

Atomic-scale measurement of ultraslow Li motions in glassy LiAlSi₂O₆ by two-time ⁶Li spin-alignment echo NMR, M. Wilkening, A. Kuhn, P. Heitjans, Phys. Rev. B 78 (2008) 054303.

Tuning the Li diffusivity of poor ionic conductors by mechanical treatment: High Li conductivity of strongly defective LiTaO₃ nanoparticles, M. Wilkening, V. Epp, A. Feldhoff, P. Heitjans, J. Phys. Chem. C 112 (2008) 9291.

Ion Transport and Diffusion in Nanocrystalline and Glassy Ceramics - Impedance and NMR Spectroscopy Measurements on Li Ion Conductors, P. Heitjans, E. Tobschall, M. Wilkening, Eur. Phys. J. Special Topics 161 (2008) 97.

Li dynamics in amorphous LiNbO₃ as probed by solid state NMR on different length scales, M. Wilkening, M. Masoud, P. Heitjans, Diffusion Fundamentals 8 (2008) 5.1.

The Li jump process in h-Li_0.7TiS₂ studied by two-time ⁷Li spin-alignment echo NMR and comparison with results on 2D Diffusion from ⁷Li nuclear magnetic relaxation
M. Wilkening, P. Heitjans, Phys. Rev. B 77 (2008) 024311.

Tuning the structural and physical properties of Cr₂Ti₃Se₈ by Lithium intercalation: A Study of the Magnetic Properties and Investigation of Ion Mobility with NMR Spectroscopy, J. Wontcheu, W. Bensch, M. Wilkening, P. Heitjans, S. Indris, P. Sideris, C. P. Grey, J. Am. Chem. Soc. 130 (2008) 288.

2007

Diffusion parameters in single-crystalline Li₃N as probed by ⁶Li and ⁷Li spin-alignment echo NMR spectroscopy in comparison with results from ⁸Li beta-radiation detected NMR, M. Wilkening, D. Gebauer, P. Heitjans, J. Phys.: Condens. Matter 20 (2007) 022201.

Microscopic Li self-diffusion parameters in the lithiated anode material Li_4+xTi₅O₁₂ (0 ≤ x ≤ 3) measured by ⁷Li solid state NMR, M. Wilkening, W. Iwaniak, J. Heine, V. Epp, A. Kleinert, M. Behrens, G. Nuspl, W. Bensch, P. Heitjans, Phys Chem. Chem. Phys. 9 (2007) 6199.

Dynamical Aspects of Nanocrystalline Ion Conductors studied by NMR, P. Heitjans, S. Indris, M. Wilkening, in Nanocomposites Ionic Conducting Materials and Structural Spectroscopies, Series: Electronic Materials: Science & Technology , Vol. 10, P. Knauth, J. Schoonman (Eds.), 2007.

A study of Li intercalation into Cr₂Ti₃Se₈ using electrochemistry, in-situ energy dispersive X-ray diffractometry and NMR spectroscopy, J. Wontcheu, M. Behrens, W. Bensch, S. Indris, M. Wilkening, P. Heitjans, Solid State Ionics, 178 (2007) 759.

Comparison of 3D and 2D Li Diffusion in Cubic and Hexagonal Li_xTiS₂ – A Study by Solid State ⁷Li NMR Methods, M. Wilkening, P. Heitjans, Diffusion Fundamentals 6 (2007) 40.1 - 40.13.

Microscopic Access to Long-range Diffusion Parameters of the Fast Lithium Ion Conductor Li₇BiO₆ by Solid State ⁷Li Stimulated Echo NMR, M. Wilkening, C. Mühle, M. Jansen, P. Heitjans, J. Phys. Chem. B (Letter) 111 (2007) 8691.

Ultraslow Li diffusion in spinel-type structured Li₄Ti₅O₁₂– a comparison of results from solid state NMR and impedance spectroscopy, M. Wilkening, R. Amade, W. Iwaniak, P. Heitjans, Phys. Chem. Chem. Phys. 9 (2007)1239.

NMR and Impedance Studies of Nanocrystalline and Amorphous Ion Conductors: Lithium Niobate as a Model System, P. Heitjans, M. Masoud, A. Feldhoff, M. Wilkening, Faraday Discuss. 134 (2007) 67.

2006

New prospects in studying Li diffusion - two-time stimulated echo NMR of spin-3/2 nuclei, M. Wilkening, P. Heitjans, Solid State Ionics 177 (2006) 3031.

Extremely slow cation exchange processes in Li₄SiO₄ probed directly by two-time ⁷Li stimulated-echo NMR spectroscopy, M. Wilkening, P. Heitjans, J. Phys.: Condens. Matter 18 (2006) 9849.

From Ultra-slow to Fast Lithium Diffusion in the 2D Ion Conductor Li_0.7TiS₂ - Probed Directly by Stimulated-Echo NMR and Nuclear Magnetic Relaxation, M. Wilkening, W. Küchler, and P. Heitjans, Phys. Rev. Lett. 97 (2006) 065901.

Lithium intercalation into monoclinic Cr₄TiSe₈: Synthesis, structural phase transition, and properties of Li_xCr₄TiSe₈ (x = 0.1 ‒ 2.8), M. Behrens, O. Riemenschneider, W. Bensch, S. Indris, M. Wilkening. P. Heitjans, Chem. Mater. 18 (2006)1569.

2005

Solid-State Diffusion and NMR, P. Heitjans, S. Indris, M. Wilkening, in: Diffusion Fundamentals
J. Kärger, F. Grinberg, P. Heitjans (Eds.), Leipziger Universitätsverlag, Leipzig 2005, pp. 226-245, www.uni-leipzig.de/diffusion/journal

Ultra-slow diffusion in polycrystalline h-Li_1.0TiS₂ studied by ⁷Li spin-alignment echo NMR spectroscopy, M. Wilkening, P. Heitjans, Defect Diffus. Forum 237-240 (2005) 1182.

2002-2004

Electric field gradient calculations for h-Li_xTiS₂ and comparison with ⁷Li NMR results, T. Bredow, P. Heitjans, M. Wilkening, Phys. Rev. B 70 (2004) 115111.

Heterogeneous Diffusion in nanocrystalline Li₂O : Al₂O₃ composites, M. Wilkening, S. Indris, P. Heitjans, Phys. Chem. Chem. Phys. 5 (2003) 2225. 

Diffusion in amorphous LiNbO₃ studied by ⁷Li NMR - comparison with the nano- and microcrystalline material, M. Wilkening, D. Bork, S. Indris, P. Heitjans, 
Phys. Chem. Chem. Phys. 4 (2002) 3246.
 

.