Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 10, Issue 3, Pages 780-787Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ee03192g
Keywords
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Funding
- Swiss National Science Foundation [147661]
- German National Academic Foundation
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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, we introduce and investigate interdigitated, tapered multiple-pass microfluidic networks in miniaturized flow cells. 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. The electrolytes employed modest concentrations of 0.4 M K4Fe(CN) 6 and 0.2 M 2,6-dihydroxyanthraquinone in alkaline electrolyte. We thereby show that rational tailoring of fluidic networks in RFCs is key for the development of devices effectively combining power delivery and thermal management.
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