Duration: 01.10.2013 – 31.10.2016

Project management: Dr. Harald Kren

Funding: FP7-ENERGY-2013-1 (Project nummer: 608491)

Partner: COMMISSARIAT A L ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES (FRA), CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (FRA), TECHNION - ISRAEL INSTITUTE OF TECHNOLOGY (IL), HUTCHINSON GMBH (GER), IOLITEC IONIC LIQUIDS TECHNOLOGIES GMBH (GER)

The present project aims at improving the performance of LiB and supercapacitors. This step requires a deep understanding of interfaces and interphases evolution within the electrode in cycling in order to control and improve their properties as addressed by the Topic ENERGY.2013.7.3.3

We propose in this project to create a network of multiprobe characterization techniques in order to investigate these interfaces and their behavior through in situ/in operando methods. The goal is to control and then optimize the negative electrode/electrolyte interface (active material morphology and functionalization, electrode formulation, electrolyte formulation) by investigating structural, chemical and morphological changes during electrochemical cyclability. Deep insight in the process will be gained through a network of classical and advanced techniques of characterization including large scale instruments (synchrotron and neutron beam) to investigate the electrodes at molecular and atomic scale cross with a series of operand studies on model systems coupled with numerical simulations. The new data collected therein will lead us to propose enhancement strategies, which will be tested for performance and security, searching for “the fundamental basis for the next innovative generation of large electrical energy storage devices” (grid-scale). Since the project aims to improve interfacial and accompanying transport behavior, we do not propose major efforts to develop new materials and we will focus on Silicon nanopowders and graphene as active or additive materials.

Duration: 01.06.2012 - 30.06.2015

Project management: Dr. Martin Schmuck

Funding: Electromobility ERA-Net Plus Initiative

Partner: Fraunhofer IWS (GER); TU-Dresden (GER); SGL Carbon GmbH (GER); Uppsala University (SWE); Scania CV AB (SWE)

Main objective is the development of a new full cell concept for a next generation lithium sulphur battery with significantly enhanced properties. Prototype cells with energy densities larger than 400 Whkg-1 and cycle life over hundreds of cycles are expected as a result of this project. To reach this goal, close cooperative work on different components of the battery cells is necessary. Most important aspects are the material chemistry of the sulphur cathode and the electrolyte system to be combined with lithium anodes.

Duration: 01.01.2011 – 31.12.2013

Project management: Dr. Harald Kren

Funding: FP7-NMP-2009-SMALL-3 (Project number: 246073)

Partner: Commissariat à l’ Energie Atomique (FRA); Centre National de la recherche Scientifique (FRA); University of Cologne (GER); Lancaster University (UK); Universidad Politecnica de Valencia (ESP); Centro Ricerche Fiat SCPA (ITA); VARTA Microbattery (GER)

Link: http://www.fp7grenada.eu/index.html

Within the last years nano-structured films gained enormous importance in electrical (transistors) optical (OLED), magnetical and electrochemical (batteries and super capacitors) applications. One of the most promising applications within these materials is the induction of graphene in lithium ion batteries. On the one hand graphene may serve as active material in negative electrodes or, on the other hand, graphene may represent a promising conducting agent at the negative and positive electrode. Next to lithium ion batteries graphene represents an auspicious material for the application within electrodes for super capacitors.

Theoretically the lithiation of graphene results in the establishment of LiC3 with a theoretical maximum capacity of 744 Ah/kg, combined with an outstanding electrical conductivity.

Together with seven excellent partners within the consortium and funded by the 7th framework program of the European commission, Varta Micro Innovation investigates the applicability of graphene for lithium ion battery application.

Duration: 01.01.2011 - 31.12.2013

Project management: Dr. Martin Schmuck

Funding: FWF (Kooperatives Projekt)

Partner: Leibniz-Institut für Polymerforschung Dresden (GER); Institut für Optik und Atomare Physik - TU-Berlin (GER); Universität Ulm (GER)

Link: http://www.spp1473.kit.edu/24.php

The main objective of the project is development of approaches, which will allow design Lis-S batteries increase of energy density up to 750 Wh/kg combined with high reversibility of charge-uncharged cycles. In particular, we will develop and investigate novel intercalated cathodes, which are hierarchically structured on both micro and nanoscale.

Duration: 01.10.2010 – 31.12.2013

Project management: Dr. Harald Kren

Funding: Kompetenzzentrenprogramm COMET der FFG

Partner: Polymer Competence Center Leoben (AUT); TU Graz – ICTM (AUT); ISOVOLTAIC AG (AUT)

This project targets on the establishment of electrochemical power storage devices based on polyradical cell reactions. So-called “organic radical batteries” (ORBs) allow higher rate capability and extended cycle life (>1000 cycles) compared to other battery types, but still exhibit high charge/discharge capacities (~ 200 mAh/g).

In the 1970s secondary organic batteries were described by Heerer et al. using doped polyacetylene. Intensive research resulted in matrix polymers ensuring charge transfer by electron-hopping along various, redox-active side chains. The most common example for a cathode active material is represented by the 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO) unit immobilized at an polymer matrix. The working principle is based on nitroxide radicals getting oxidized to oxoammonium cations during the charging step, followed by the corresponding back reaction during the discharge step.

Based on the state of the art, this promising power storage device is investigated together with the Polymer Competence Center Leoben (PCCL) and the Institute for Chemistry and Technology of Materials (ICTM, TU Graz).

Duration: 01.10.2009 – 30.09.2013
    TUGraz: 01.10.2009 – 30.06.2011
    VMI: 01.07.2011 – 30.09.2013

Project management: Dr. Bernd Fuchsbichler

Funding: Neue Energien 2020 (2. Ausschreibung)

Partner: Platingtech Beschichtungs- GmbH (AUT)

The goal of the NEULIBE project is to improve energy and power density of Lithium -Ion batteries by the use of three-dimensional current collectors based on metallized polymer non wovens.

Currently copper and aluminum foils are mostly used as current collectors in lithium ion batteries. Because they offer, apart from a certain roughness of their surfaces, basically only a 2-dimensional area of contact to the rest of the electrode components, thereby only a relatively small contact area between these foils and the electrochemical active material is given. The resulting poor electron transport may be one of the reasons for poor electrode kinetics and rate capability of such electrodes.

Three-dimensional current collectors have a significantly larger contact area than the above-mentioned current collector foils, whereby the electrical connection of the active materials is remarkably improved. A further advantage of three dimensional current collectors consists in an improvement of the mechanical stability of such electrodes by embedding of the active material into the three dimensional network of the current collector. This is essential especially in the use of high-capacity anode materials (for example silicon or tin), since these active materials are associated with major volume changes during lithiation and delithiation.

Therefore, three-dimensional current collectors have the potential to become a key technology for the next generation of lithium -ion batteries.