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Research group Prof. Dr. Jürgen Janek

Physical chemistry of solids – solid state ionics and electrochemistry
Current notice

New PhD projects available in the field of Solid State Batteries. In case of interest please contact directly Prof. Janek.

Welcome to our homepage!

RG Janek stats summer 2014

The research of our group is directed towards the physicochemical basis of solid state processes, that are important for modern energy and interface technologies.

 

 

Recent Publications

LATP and LiCoPO4 thin film preparation–Illustrating interfacial issues on the way to all-phosphate SSBs
P. Hofmann, F. Walther, M. Rohnke, J. Sann, W. G. Zeier, and J. Janek, Solid State Ion. 342 (2019) 115054; find paper here

 

Experimental Assessment of the Practical Oxidative Stability of Lithium Thiophosphate Solid Electrolytes
G. F. Dewald, S. Ohno, M. A. Kraft, R. Koerver, P. Till, N. M. Vargas-Barbosa, J. Janek, and W. G. Zeier, Chem. Mater. (2019); find paper here

 

Lithium-Metal Growth Kinetics on LLZO Garnet-Type Solid Electrolytes
T. Krauskopf, R. Dippel, H. Hartmann, K. Peppler, B. Mogwitz, F. H. Richter, W. G. Zeier, and J. Janek, Joule 3 (2019) 2030-2049; find paper here

 

Interfacial stability of phosphate-NASICON solid electrolytes in Ni-rich NCM cathode-based solid-state batteries
T. Yoshinari, R. Koerver, P. Hofmann, Y. Uchimoto, W. G. Zeier, and J. Janek, ACS Appl. Mater. Interfaces (2019); find paper here

 

Guidelines for all-solid-state battery design and electrode buffer layers based on chemical potential profile calculation
T. Nakamura, K. Amezawa, J. Kulisch, W. G. Zeier, and J. Janek, ACS Appl. Mater. Interfaces (2019); find paper here

Picture of the month - August 2019

Here you can find alternating insights into our research group. Enlarged versions of all published pictures can be found here.

Atomic Force Microscopy (AFM) is a method of characterizing a sample surface by passing a tip close to the surface to be examined. By measuring the atomic forces between the tip and the surface by means of the deflection of the tip, it is possible to obtain information about the topography of the surface or to determine the magnetic and chemical properties of the surface. The picture on the left shows the topography of a cathode for lithium-ion batteries investigated by AFM, in which as active material secondary particles of Li(Ni,Co,Mn)O2 with a diameter of a few micrometers are embedded in carbon. In the right image, an electrically conductive tip was used during the AFM measurement to examine the electrical conductivity of the cathode at the surface. Clearly recognizable is the impact of carbon as conductive additive, since an electrical current is measured mainly in the region, where carbon is found. (Picture submitted by Miguel Wiche and Matthias Elm)

Atomic Force Microscopy (AFM) is a method of characterizing a sample surface by passing a tip close to the surface to be examined. By measuring the atomic forces between the tip and the surface by means of the deflection of the tip, it is possible to obtain information about the topography of the surface or to determine the magnetic and chemical properties of the surface. The picture on the left shows the topography of a cathode for lithium-ion batteries investigated by AFM, in which as active material secondary particles of Li(Ni,Co,Mn)O2 with a diameter of a few micrometers are embedded in carbon. In the right image, an electrically conductive tip was used during the AFM measurement to examine the electrical conductivity of the cathode at the surface. Clearly recognizable is the impact of carbon as conductive additive, since an electrical current is measured mainly in the region, where carbon is found. (Picture submitted by Miguel Wiche and Matthias Elm).

The WG Janek is involved in the following networks
Logo BASF BASF-Forschungsnetzwerk "Elektrochemie und Batterien"

FestBatt

BMBF-Kompetenzcluster für Festkörperbatterien "FestBatt"

BMBF

BMBF-Projekt MaLiBa

"Maßgeschneiderte Lithium-Metall-Anoden für zukünftige Batteriesysteme"

BMBF-Projekt MeLuBatt

BMBF-Projekt MeLuBatt

 "Frischer Wind für Metall/Luftsauerstoff-Batterien:

Was man von Lithium-Ionen-Batterien lernen kann"

NASEBER

 BMBF-Projekt NASEBER

"Natriumbasierte feste Sulfid- und Oxid-Elektrolyt-Batterien"

BMBF

BMBF - Deutsch-Japanisches Programm


Projekt "Osaban" (Operando surface analytics for batteries with
3D-structured metal anodes)

 

Projekt "InCa" (Interfaces in Composite All-solid-state Cathodes: Advanced Characterization and Optimization; 3D analysis of structured composite cathodes)

BMBF

BMBF - Deutsch-Taiwanesisches Programm

Projekt "EvaBatt"

BMBF

BMBF - Deutschland-USA (DE-US)

Projekte "LiSi" und "CatSE"

DFG

DFG-Exzellenzinitiative - Cluster "POLIS"

German Israeli Battery School

German Israeli Battery School