MAVO LiScell

Overview#

Principle of a lithium-sulfur battery cell
© Fraunhofer IWS Dresden
Principle of a lithium-sulfur battery cell
Thermal characterization of a pouch cell
© Fraunhofer IVI Dresden
Thermal characterization of a pouch cell

The efficient storage of electric energy is a bottleneck for all mobile electric applications. Battery usage is significantly limited by weight and costs per kWh storage capacity. Current lithium-ion batteries do not only limit the range of electric cars to no more than 150 km, they also make up the largest part of the total manufacturing costs. Accordingly, there is a pressing demand for novel storage systems with higher energy densities and lower costs.

Apart from lithium-air systems, which are still in a state of early basic research, there is now an increasing interest in lithium-sulfur batteries (Li-S). Here, specific energy densities of more than 600 Wh/kg are expected and in addition, the expensive cathode material of lithium-ion cells is substituted by sulfur, which is less expensive, non-toxic and available in virtually unlimited quantities. In previous developments for Li-S batteries lithium-metal anodes were applied, a material which is extensively responsible for low lifetime and safety risks.

Project aims#

Lithium-sulfur pouch cell
© Fraunhofer IWS Dresden
Lithium-sulfur pouch cell

Within the framework of the MAVO LiScell battery cells, based on novel cathodes, electrolytes and anodes will be developed. Research work focuses on scalable manufacturing processes for anodes and cathodes as roll material as well as on material development.

The scientists aspire to storage densities of >400 Wh/kg, charging cycle stabilities of more than 1000 and a high intrinsic cell stability for this novel cell type. Low cost manufacturing processes for the components as well as for the complete module are targeted to demonstrate the extraordinary potential of the LiSCell technologies for overall competitive battery costs.

Project duration#

01.06.2014 - 31.05.2017