PAGE TITLE
Overview
PAGE SUMMARY
Traditional flow batteries suffer from slow response rates due to faradaic reactions at the electrode-electrolyte surface and have limited cycle lifetimes (<12,000 cycles) which is a critical factor for grid scale energy storage. In contrast, the electrochemical flow capacitor is a rechargeable electrochemical energy storage system that utilizes flow battery architecture and is based on the fundamental working principles of supercapacitors. The primary difference between traditional flow cells and the EFC is that the EFC utilizes a flowable carbon-electrolyte ‘slurry electrode’ for capacitive energy storage (see Figure below). During operation the slurry is pumped from a storage reservoir through two polarized plates (charging process). Once fully charged, the slurry is pumped out of the cell and stored in external reservoirs until the process is reversed and the slurry is discharged. The charged slurry stores charge electrostatically at the carbon/electrolyte interface, which allows for rapid charging and discharging leading to a higher power density. Faradaic charging processes have losses that cause degradation of the device over time compared to electrostatic charging, which has near 100% efficiency and millions of charge-discharge cycles.
APPLICATIONS
TITLE: Applications
Grid scale energy storage
Desalination
Rapid energy recovery and delivery
ADVANTAGES
TITLE:Advantages
Higher power than flow batteries
Rapid charging and discharging
Long lifetime - millions of cycles
Safe, low-cost, non-toxic materials
Scalable energy storage capacity
FIGURES: Insert Figure Image Inside Figure Tags within Editor
Figure 1
Figure 1 Caption:
Operational schematic of the electrochemical flow capacitor. Uncharged slurry flows through polarized plates and charged. At the pore level, electrode neutrality is maintained at the interface between the electrolyte and active material. This slurry is then pumped into external reservoirs for storage. The process is reversed during discharge.
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IP STATUS
Intellectual Property and Development Status
United States Issued Patent- 9,171,679
https://patents.google.com/patent/US9171679B2/en?oq=9%2c171%2c679
PUBLICATIONS
References
Pubinfo should be the citation for your publication. Publink is the full url linking to the publication online or a pdf.
Dennison, C. R., Beidaghi, M., Hatzell, K. B., Campos, J. W., Gogotsi, Y., and Kumbur, E. C., 2014, “Effects of flow cell design on charge percolation and storage in the carbon slurry electrodes of electrochemical flow capacitors,” Journal of Power Sources, vol. 247, pp. 489-496. /rss.pubinfo1>
http://nano.materials.drexel.edu/wp-content/uploads/2013/02/2016-10.pdf
Hatzell, K. B., Beidaghi, M., Campos, J. W., Dennison, C. R., Kumbur, E. C., and Gogotsi, Y., 2013, “A high performance pseudocapacitive suspension electrode for the electrochemical flow capacitor,” Electrochimica Acta, vol. 111, pp. 888-897.
http://www.sciencedirect.com/science/article/pii/S0013468613016253
Presser, Volker, Christopher R. Dennison, Jonathan Campos, Kevin W. Knehr, Emin C. Kumbur, and Yury Gogotsi. "The electrochemical flow capacitor: a new concept for rapid energy storage and recovery." Advanced Energy Materials 2, no. 7 (2012): 895-902.
http://onlinelibrary.wiley.com/doi/10.1002/aenm.201100768/abstract
Campos, Jonathan W., Majid Beidaghi, Kelsey B. Hatzell, Christopher R. Dennison, Benjamin Musci, Volker Presser, Emin C. Kumbur, and Yury Gogotsi. "Investigation of carbon materials for use as a flowable electrode in electrochemical flow capacitors." Electrochimica Acta 98 (2013): 123-130.
http://www.sciencedirect.com/science/article/pii/S0013468613004349
Commercialization Opportunities
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Contact Information
Web Site
http://nano.materials.drexel.edu
For Technical Information:
E. Caglan Kumbur, Ph.D.
Assistant Professor of Mechanical Engineering
Electrochemical Energy Systems Laboratory
Drexel University, Philadelphia, PA 19104
Ph : 215.895.5871
Fax: 215.895.1478
E-mail: eck32@drexel.edu
For Intellectual Property and Licensing Information:
Elizabeth Poppert, Ph.D.
Licensing Manager
Phone: 215-895-0999
Email: lizpoppert@drexel.edu