Hybrid Electrochemical Capacitors In Aqueous Electrolyte Operating At Sub-Ambient Temperatures (Energy Storage Innovations Europe 2019)

Dr Qamar Abbas, Senior Researcher
Graz University of Technology
Austria
 

Presentation Summary

Electrochemical capacitors are mainly used for high power outputs and long cycle life. However, it is desirable that they exhibit high energy while simultaneously avoiding to use organic solvents, mainly because of their flammablity and toxic nature. An alternative design of ECs with green aqueous electrolytes effectively solves the environmental and safety issues. In addition, through the hybridization of battery-like and capacitor-like electrodes in aqueous electrolyte, the so-called hybrid electrochemical capacitors with high energy and power performance could reach the electrochemical performance of ECs with acetonitrile-based electrolytes. In this presentation, a solution to critical issue of low temperature performance of aqueous electrochemical capacitor is proposed. We have used choline salts based aqueous electrolyte which enables hybrid capaciotrs to operate down to -40oC.

Speaker Biography (Qamar Abbas)

Dr. Qamar Abbas is a senior researcher and leader of Lise Meitner Project at TU Graz (Austria). He is a specialist in designing new electrodes and electrolytes with over 10 years of experience in fabrication and testing of electrochemical capacitors.

Company Profile (Graz University of Technology)

Technische Universit├Ąt Graz (TU Graz) was founded in 1811 in Styria by Archduke John of Austria. TU Graz is a public university which offers 18 bachelors, 33 master programmes (out of which 16 are in English) and Doctoral programms in 14 Doctoral schools, all offered in English. TU Graz has over 13000 students with a good representation of 24% women and 20% international students. Chemistry and Chemical Engineering at TU Graz has excellent standing with a ranking group of 301-400 (QS world university ranking by subject 2019). TU Graz has a long tradition with energy storage research which is well-kept under the current leadership with special focus on Batteries, Fuel cells and Supercapacitors.
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