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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 56: Materials for Energy Storage II (joint session KFM/CPP)

CPP 56.1: Hauptvortrag

Mittwoch, 14. März 2018, 15:00–15:30, EMH 025

Electrical double layer capacitors, Insights from fundamental research and their impact on storage devices — •Gudrun Reichenauer — Bavarian Center for Applied Energy Research, 97074 Wuerzburg, Germany

Electrical double layer capacitors (EDLC) are important components in the toolbox of currently available electrical storage devices, serving in particular applications that require reliability and high power density, such as e.g. emergency doors in airplanes, or high cycling stability at low to medium energy density, such as electrically driven buses for public transportation. Typically, optimization of EDLCs is performed by empirical tests of different active materials, binders and conductive additives. However, only limited systematic studies are available to address questions, such as

What are the optimized structures in terms of pore sizes and porosity of the active component?

How do the micropore (pores < 2 nm) characteristics affect the storage in the presence of organic, aqueous and polymer electrolytes?

What is the impact of the device layout vs. the properties of the electrode itself on the performance (energy and power density) of an EDLC?

The talk will address some of these questions using model carbon materials that allow systematic variation of key parameters and also show how new in-situ/in-operando techniques can further support a more targeted development of EDLC storage devices for different types of applications.