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Cuprous Bromide Electrochemistry and its Application in a Flow Battery

Stricker, Elizabeth Ann
http://orcid.org/0000-0003-3251-3292
http://rave.ohiolink.edu/etdc/view?acc_num=case1546604124529032

Abstract Details

2019, Doctor of Philosophy, Case Western Reserve University, Chemical Engineering.
Cuprous and cupric bromide electrochemistry and speciation was examined in electrolytes and concentrations of interest to an all-copper flow battery (CuFB) in a bromide ion supported electrolyte. The all-CuFB was also examined and it was shown that an all-CuFB can operate at geometric current densities of up to 300 mA cm-2 at a temperature of at least 50°C. In addition, the battery was cycled for 50 cycles from 0 to 60% SOC with plating capacities of 125 mAh cm-2 with a voltaic efficiency of 64% at a temperature of 50°C. However, capacity fade (and thus fading coulombic efficiency) was observed due to non-adherent plating on the carbon electrode. Morphology and nucleation of cuprous bromide was examined via current time transients and qualitative plating experiments. Cuprous bromide electrodeposits adhered to gold, silver, and platinum but did not adhere to titanium or glassy carbon. This may due to a lattice mismatch between the copper crystalline structure and the substrate structure. It was determined that electronucleation of cuprous bromide at 30°C between overpotentials of 10 and 150mV on glassy carbon substrates most closely resembled progressive nucleation. Utilizing in situ methods to study the electrochemical nucleation and morphology of cuprous bromide led to the examination of high aspect ratio small gap height cells with side by side electrodes which are typically used for in situ ec-S/TEM. A Wagner number was derived which allows one to determine whether uniform current distribution is expected in the current ec-S/TEM cell design and chemistry of interest.
Robert Savinell (Committee Chair)
Rohan Akolkar (Committee Member)
Julie Renner (Committee Member)
Daniel Scherson (Committee Member)
Jesse Wainright (Committee Member)
163 p.
Alternative Energy; Chemical Engineering; Chemistry; Energy; Engineering; Materials Science; Metallurgy; Nanotechnology
flow batteries; diffusion coefficient; diffusion; cupric; copper; halide; TEM; in situ; Wagner Number; morphology; in situ electrochemistry; microelectrochemistry; nanoelectrochemistry; self generating slurry; slurry; electron microscopy

Recommended Citations

Citations

  • Stricker, E. A. (2019). Cuprous Bromide Electrochemistry and its Application in a Flow Battery [Doctoral dissertation, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1546604124529032

    APA Style (7th edition)

  • Stricker, Elizabeth. Cuprous Bromide Electrochemistry and its Application in a Flow Battery. 2019. Case Western Reserve University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1546604124529032.

    MLA Style (8th edition)

  • Stricker, Elizabeth. "Cuprous Bromide Electrochemistry and its Application in a Flow Battery." Doctoral dissertation, Case Western Reserve University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1546604124529032

    Chicago Manual of Style (17th edition)

case1546604124529032
743
© 2019, all rights reserved.
This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.