High-Power-Density Heat-Managing Miniaturized Redox Flow Batteries: Fusing Cooling and Power Delivery in 3D-Integrated Electronics

Date: 
Thursday, April 20, 2017 - 3:00pm
Location: 
3110 Etcheverry Hall
Speaker: 
Professor Dimos Poulikakos

Director, Laboratory of Thermodynamics in Emerging Technologies

Institute of Energy Technology
ETH Zurich

About: 

The miniaturization of redox flow cells (RFCs) paves the way to novel energy conversion concepts combining power delivery and heat regulation. Envisioning the integration of high-power-density RFCs into electronic devices such as microprocessors, lasers, or light-emitting diodes for the purpose of providing power and heat management simultaneously, optimisation of the enabling microfluidic networks in miniaturized flow cells is critical. Employing 3D-printing for the facile and inexpensive fabrication of these networks, we demonstrate RFCs with maximum power densities of up to 1.4 W cm^-2 at room temperature and net power densities of up to 0.99 W cm^-2 after subtracting pumping power losses (highest reported to date). The electrolytes employed modest concentrations of 0.4 M K4Fe(CN)6 and 0.2 M 2,6-dyhydroxyanthraquinone in alkaline electrolyte. I will thereby show that rational tailoring of fluidic networks in RFCs is key for the development of devices effectively and efficiently combining power delivery and thermal management (1).

 

1. Marschewski J, Brenner L, Ebejer N, Ruch P, Michel B, Poulikakos D: 3D-printed fluidic networks for high-power-density heat-managing miniaturized redox flow batteries. Energy and Environmental Science 2017, doi: 10.1039/c6ee03192g

Biography: 

Professor Dimos Poulikakos holds the Chair of Thermodynamics at ETH Zurich, where in 1996 he founded the Laboratory of Thermodynamics in Emerging Technologies in the Institute of Energy Technology. He was a Member of the Research Commission of ETH (2001-2005). He served as the Vice President of Research of ETH Zurich in the period 2005-2007. Professor Poulikakos was the ETH director of the IBM-ETH Binnig-Rohrer Nanotechnology center, a unique private-public partnership in nanotechnology at the interface of basic research and future oriented applications (2008-2011). He served as the Head of the Mechanical and Process Engineering Department at ETH Zurich (2011-2014). His research is in the area of interfacial transport phenomena, thermodynamics and related materials with a broad range of emerging technologies and applications. The focus is on understanding the related physics, in particular at the micro- and nanoscales and employing this knowledge to the development of novel technologies.

 

Hosted by: Professor Costas Grigoropoulos, 6129 Etcheverry Hall, 510- 642-2525, cgrigoro@berkeley.edu