A new generation of the lithium battery:

assembly of an all-solid-state system

HOMING Program sponsored by the Foundation for Polish Science

The 2 year project, A new generation of the lithium battery: assembly of the all-solid-state system is awarded to the Project Manager and is carried out within the 5th edition of the Homing programme of the Foundation for Polish Science co-financed by the European Union under the European Regional Development Fund.

The project manager will lead the group of one PhD and two master students. This project is located at the Faculty of Chemistry, University of Warsaw in the Laboratory of Electrochemical Power Sources. The Team Leader of this laboratory is Prof. Andrzej CzerwiƄski, an expert in energy storage systems and a highly experienced research and development scientist and inventor. His laboratory is fully equipped for electrochemical studies on lithium technologies. Highly qualified scientific Mentors, both Polish and international, will closely collaborate with the project manager and students to ensure the success of this proposal. This project is divided into the three parts: battery electrode and electrolyte preparation and testing, ASSB assembly and optimization, and revealing the ionic conduction mechanism based on the results.

Aims of the project

Larger polarizability of the anions in the same structure allows for similar hopping-site environments and lower the activation energy barriers, greatly increase the ionic conductivity. This is why sulfur-based superconductors are the first choice for this project, before trying the oxide materials. Lithium metal anode and several different types of modern cathodes will be applied to test their compatibility in an all-solid-state battery (ASSB) system. There are several demonstrations of such ASSBs, but in order to improve their electrochemical performance it is necessary to prepare good interfaces between the electrodes and solid electrolyte. Several chemical approaches to improve those contacts will be tested, as well as battery assembly improvements. The correct formation of the interfaces will provide a better ionic conduction path, another purpose of this study. Even though the assembly of an ASSB might be more tricky in a sulfide-based system, the effort and success of such configuration will lead to the filing of an attractive patent application.

The relationship of a dynamic lattice to the ionic conductivity of these systems is still not fully understood, so in collaboration with Department of Physics, the Chalmers University of Technology in Sweden, we plan to provide evidence on how changing the atoms in a sublattice affects its ionic transport and structural properties. We would like to combine structural characterization and electrochemical impedance spectroscopy, and theoretical calculation on the ionic transport in studied materials to find the theoretical explanation of their conduction mechanism. This research can be a stepping stone to a better understanding of ionic transport in these materials, helping choose accurate technological strategies.

Research tasks

1. Preparation and characterization of battery components.

1.1 Preparation of electrodes (in collaboration withDr L. Lipinska from ITME, Poland and Prof. W. Wieczorek from Warsaw University of Technology, Poland).

1.2 Preparation of solid state electrolytes (in collaboration with Dr H. Wang from University of Louisville, USA, and Prof. W. Wieczorek from Warsaw University of Technology, Poland).

1.3 Characterization of battery materials (in collaboration with Prof. W. Wieczorek from Warsaw University of Technology, Poland and Dr. J. Jasinski from University of Louisville, USA).

1.3.1 Electrochemical test on raw materials.

1.3.2. Structural and morphological study on raw materials.

2. Assembly and optimization of an all-solid-state battery.

2.1 Assembly of all-solid-state batteries (possible patent application after completion of this stage and promising electrochemical testing)

2.2 Electrochemical testing of batteries (in collaboration with Prof. W. Wieczorek from Warsaw University of Technology, Poland)

2.3 In situ/Ex situ studies of ASSB (in collaboration with Dr. J. Jasinski from University of Louisville, USA )

3. Investigation of the conduction mechanism based on experimental results and theoretical calculations

(in collaboration with Prof. P. Johansson and Dr. A. Hellman from Chalmers University of Technology)