Journal
ADVANCED ENERGY MATERIALS
Volume 2, Issue 7, Pages 895-902Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201100768
Keywords
supercapacitors; electrochemical energy storage; grid energy storage; flow cells
Categories
Funding
- Fluid Interface Reactions, Structures and Transport (FIRST) Center, an Energy Frontier Research Center
- US Department of Energy, Office of Science, Office of Basic Energy Sciences [ERKCC61]
- Alexander von Humboldt Foundation
- US National Science Foundation Integrated Graduate Education and Research Traineeship (IGERT) in Nanoscale Science and Engineering [DGE-0654313]
- NSF REU [235638]
- Southern Pennsylvania Ben Franklin Energy Commercialization Institute [001389-002]
- US National Science Foundation Bridge [1026641]
- Direct For Education and Human Resources
- Division Of Human Resource Development [1026641] Funding Source: National Science Foundation
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Availability of grid-scale electric energy storage systems with response rates on the order of seconds plays a key role in wide implementation of renewable energy sources. Here, a new concept called the electrochemical flow capacitor (EFC) is presented. This new concept shares the major advantages of both supercapacitors and flow batteries, providing rapid charging/discharging while enabling the decoupling of the power and energy ratings. Like in supercapacitors, energy is stored in the electric double layer of charged carbon particles. A flowable carbon-electrolyte mixture is employed as the active material for capacitive energy storage, and is handled in a similar fashion to flow or semi-solid batteries (i.e., for charging/discharging, it is pumped into an electrochemical cell, and for storage, it is pumped into reservoirs). This study presents the proof-of-concept of this technology and reports initial EFC performance data obtained under static and intermittent flow operations.
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