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FUNDAMENTAL FLOW BATTERY STUDIES: ELECTRODES AND ELECTROLYTES

Miller, Mallory A
http://rave.ohiolink.edu/etdc/view?acc_num=case148224641339497

Abstract Details

2017, Doctor of Philosophy, Case Western Reserve University, Chemical Engineering.
Redox flow batteries (RFBs) are flexible in design due to de-coupling of power and energy, thus making them attractive for large scale energy storage applications. This technology is capable of interfacing with renewable energy sources and provides an alternative solution to balancing power consumption and generation. Despite their advantages, RFBs have not yet been widely commercialized. This work addresses two major issues with RFB systems. First, new non-aqueous based electrolytes were explored and developed. This approach is based on low cost ionic liquids that are safe, non-volatile, and allow for high concentrations of active species. The electrochemistry of multi valent iron species has been examined in a deep eutectic solvent (DES) system. The iron redox reactions reactions appear to be fast and reversible, however, RFB performance is limited by the sluggish kinetics of the iron electroplating reaction as well as poor deposit quality. Thus, iron deposition was studied in detail and an understanding of the roles of ionic species as well as the deposition mechanism is discussed. Second, novel carbon fiber microelectrodes (CFME) were developed as a way to isolate electrokinetics effects occurring within RFB electrodes. This enabled exploration of effects of surface treatments on reaction kinetics in a controlled fashion. The all-vanadium chemistry is on the way to commercialization and was thus chosen for this study. This work shows that the addition of surface oxides improves the kinetics of the V2+/V3+ reaction by an order of magnitude and hinders VO2+/VO2+ by a factor of four, which contrasts most contemporary views within the literature.
Robert Savinell (Advisor)
Jesse Wainright (Committee Member)
Burcu Gurkan (Committee Member)
Mark DeGuire (Committee Member)
206 p.
Energy; Engineering

Recommended Citations

Citations

  • Miller, M. A. (2017). FUNDAMENTAL FLOW BATTERY STUDIES: ELECTRODES AND ELECTROLYTES [Doctoral dissertation, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case148224641339497

    APA Style (7th edition)

  • Miller, Mallory. FUNDAMENTAL FLOW BATTERY STUDIES: ELECTRODES AND ELECTROLYTES. 2017. Case Western Reserve University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case148224641339497.

    MLA Style (8th edition)

  • Miller, Mallory. "FUNDAMENTAL FLOW BATTERY STUDIES: ELECTRODES AND ELECTROLYTES." Doctoral dissertation, Case Western Reserve University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case148224641339497

    Chicago Manual of Style (17th edition)

case148224641339497
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© 2016, some rights reserved.Creative Commons License FUNDAMENTAL FLOW BATTERY STUDIES: ELECTRODES AND ELECTROLYTES by Mallory A Miller is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.