HANNOVER MESSE 2020, 20 - 24 April
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A reinforcement for electrolytes

New class of materials for lithium- ion batteries.

Logo Karlsruher Institut für Technologie


Karlsruher Institut für Technologie

Exhibitor details
Exhibitor details
Logo A reinforcement for electrolytes

Product description

Lithium-ion accumulators still belong to the most efficient electrochemical storage systems. They are characterised by a high specific energy content , which enables them to provide energy for portable devices with a high energy demand, such as tablets, power-tools or electric vehicles. Despite success scored so far, the aim is above that of significantly improving energy density, battery safety and cell performance. Although the liquid electrolytes that are currently used feature a high degree of ion conductivity, using them does bear disadvantages when they are in operation. Potential leakages and the danger of thermic runaway represent a safety risk. This risk can be effectively limited with solid electrolytes. At the KIT scientists have developed filler-reinforced polymers that could be used as solid electrolytes. This new class of materials is based on an ionic liquid containing acryl that ensures the mobility of the charge carriers. It is mixed with nano- to micro-scale, functionalised fillers and a lithium conductive salt. The viscose paste that is obtained in this manner and is also referred to as ionogel is homogenised and polymerised in a subsequent step, so that a direct chemical bonding between the ionic liquid and the filler is achieved and optimum mechanical stability is ensured. As a firmly bonded layer, the polymer can be employed as a solid electrolyte membrane. In addition, a large proportion of filler and the resulting strength protect the electrodes from dendrite growth. The material properties, such as conductivity, strength, dielectricity or elasticity, can be modified by the amount of filler in the mixture, which makes them applicable for a wide range of purposes, for example also outside lithium ion technology as condenser membranes.

You can get an overview of this technology at KIT stand. Detailed information can be exchanged individually in contact with the responsible scientific employees of KIT after the industry fair.

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