Fraunhofer-Institut für Keramische Technologien und Systeme IKTS

Winterbergstr. 28, 01277 Dresden
Telephone +49 351 25537700
Fax +49 351 25537600

Hall map

Energy Storage Europe 2018 hall map (Hall 8b): stand B39

Fairground map

Energy Storage Europe 2018 fairground map: Hall 8b

Our products

Product category: Battery Production Technologies

Energy storage systems

Fraunhofer IKTS works on cost-effective, decentralized energy storage devices by working with both lithium-ion batteries and their production engineering, as well as batteries that use ceramic sodium solid-state ionic conductors. Metal-air batter­ies and super capacitors represent other focal points. Zeolites, phase change materials and salt storage components are offered for thermal storage. Development issues encompass complete value-added chains for energy storage devices and their production, from the laboratory scale to full-scale indus­trial production.

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Product category: Battery Production Technologies

Battery and special powders

The Powder Technology group uses its excellent equipment to produce functional materials and other special powders besides structural ceramics.

In particular, active masses for the electrodes of electrochemical storage devices, such as Li-ion batteries, supercaps and other battery types, often rely on powder showing very precise granule features with respect to morphology, size and composition.

The “Powder Technology” group has at its disposal all procedures for modifying, packaging and characterizing, with regard to powder properties, battery power and its chemical raw materials under inert gas up to a technical scale of several 100 kg.

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Product category: Battery Production Technologies

Glasses and glass-ceramics for Li-ion-batteries

Porous organic polymer membranes reinforced with ceramic particles are applied in Lithium ion batteries as separators between anodes and cathodes. The mechanical stability of these separators, which are filled with a Li-ion conducting electrolyte, determine the maximum operating temperatures of the batteries and improve their resistance against short circuits or hot spots. The IKTS develops Li ion conducting filler materials based on glass ceramics. Beside the mechanical stabilizing effect these types of inorganic fillers can contribute to the overall conductivity of the separator-electrolyte arrangement.

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Product category: Battery Production Technologies

Mobile Energy Storage Systems

Within the context of a sustainable energy supply on the basis of renewable energies, energy storage systems – particularly electrical energy storage systems (accumulators) – play a key role. The deep understanding of performance and aging characteristics and thus the optimum application scenario of the specific technologies as well as an application-suitable system configuration are essential for the development of such high-performance and cost-efficient energy storage systems. In collaboration with other working groups dealing with materials and technology development the entire value chain for the development and production of energy storage systems can be covered at Fraunhofer IKTS.

One main focus of the „Energy Storage Systems“ working group is the characterization of the operational, failure and long-term behavior of accumulators. This allows not only the selection of suitable products for specific application profiles but it is also an essential part of material, technology and product development. On this basis, the production processes and plants are evaluated and optimized as well. In addition, degradation and failure mechanisms are studied by means of postmortem analyses of battery cells, and the understanding of the interaction between cell design, system integration and operation mode can be improved.

Aside from the use of high-performance storage materials, their processing is essential for the quality and reliability of energy storage systems. For this reason, the working group together with industry partners is working on the development and optimization of innovative manufacturing technologies in pilot scale. It is the aim to establish cost-effective, modular and flexible (in terms of geometry and cell chemistry) production equipment. It is one of the main tasks to develop production-suitable technologies and monitoring methods which can be integrated into the production process as in-line process control for quality assurance.

For the efficient operation of energy storage systems and their system environment, the working group develops integrable prototype electronic components as well as the required operational software. This almost covers the whole spectrum of device development ranging from components for signal conditioning, power output stages and internal energy supply systems to control units. According to the requirements and complexity, software and algorithms are developed in hardware-related programming languages or in combination with system simulations in abstract programming environments.

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Product category: Battery Production Technologies

Optimization of electrolyte filling by surface modification of separators and electrodes

The filling of lithium-ion batteries with liquid electrolyte still represents a significant bottleneck in the production chain of lithium ion batteries. Uniform electrolyte distribution is decisive for cell performance and is currently being realized by a multi-stage filling and subsequent storage for several hours up to days. The aim of the joint project “Optilyt” of Fraunhofer IKTS and Leibniz Institute of Polymer Research IPF was therefore, first of all, to develop suitable measuring set-ups allowing to extend the knowledge about this filling process based on reliable and reproducible results. The second goal as well as challenge was to reduce the real filling time by developing suitable modification methods for the main components of lithium ion batteries (anode, cathode and separator).

Within the project, two measurement methods (tensiometric, electrical) that allow to monitor the filling behavior with electrolyte were used and tailored. The tensiometric method with a special measuring set-up followed the penetration of model electrolytes into all components of the cell (anode, cathode, separator), and into model stacks (anode/separator/cathode). The penetration rate was quantitatively described using the Washburn equation and the differences between the components were described by the parameters of the Washburn equation. On the other hand, a chronoamperometric method allowed to follow the filling of a lab size pouch cell with electrolyte. It was shown that the current curve characteristics were representative for the electrolyte wetting process. Both methods yielded comparable results although they used different basic concepts. Structure-property relationships could be derived.

In addition, strategies for morphological and chemical modification of the individual components were developed and studied aiming to influence the surface of the cell components and the 3D pore network to accelerate the electrolyte wetting. In the morphological modification, structures were introduced into the individual components which can act as capillaries during the filling process. Thus, the filling time could be significantly reduced. The grafting of polar monomers onto separators by either in situ or subsequent grafting did not yield significant improvements in the wetting properties, whereas the coating of the electrodes with oxides resulted in a reduction in filling time. The extensive results obtained help to better understand the filling process of lithium ion batteries and at the same time open up new areas of interest that are relevant to the complete understanding of the filling process.

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About us

Company details

Fraunhofer IKTS was founded in Dresden in 1992 as the “Fraunhofer Institute for Ceramic Technologies and Sintered Materials IKTS”. The goal of the Fraunhofer-Gesellschaft and the former Central Institute for Solid Body Physics and Materials Research was to sustain the research potential in the field of construction and functional ceramics after 1989 at this location and to develop it for the future. The institution rapidly evolved into an established research partner in the field of high-performance ceramics. In order to document the enhanced focus on “ceramic systems solutions”, the IKTS was renamed “Fraunhofer Institute for Ceramic Technologies and Systems” in 2006.

In February 2010, the Hermsdorf Institute for Technical Ceramics HITK – including the research activities of the former inocermic GmbH – was fully integrated into Fraunhofer IKTS, in order to bring together the comprehensive experiences with and expertise in materials, procedural technologies, and applications of both facilities in the area of high- performance ceramics into a combined portfolio of services. Over and beyond the development of ceramic materials, production technologies and components, the focus of Fraunhofer IKTS was thereby consistently further broadened to cover intelligent systems solutions.

In January 2014, the Dresden-based location of the Fraunhofer Institute for Non-Destructive Testing IZFP was integrated into Fraunhofer IKTS. The new branch expanded the research portfolio to include the fields of materials diagnostics, structural health monitoring and test electronics, nanoanalytics and sensor technology as well as biotechnology and environmental technology. As part of the integration process, the Dresden-Klotzsche location is to be further expanded and developed into a center for materials diagnostics. With this integration, the now three sites form Europe’s largest ceramics research institute.

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