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Thesis
Understanding the role of slurry electrode components on electrochemical performance
Master of Science (M.S.), Drexel University
Jun 2018
DOI:
https://doi.org/10.17918/6v5f-4x24
Abstract
This thesis addresses how different components of flowable electrodes (e.g. carbon slurry) affect electrochemical performance. Due to their scalability, flowable electrode systems, such as electrochemical flow capacitors (EFCs), have attracted significant attention in recent years as a result of the increasing need for efficient and reliable grid scale energy storage, load-leveling, and deionization systems. EFCs use a flowable carbon slurry electrode that comprises of an active (charge storage) material and conductive additive material suspended in liquid electrolyte. Past literature details extensive research into electrochemical optimization of the active material of carbon slurries, but the effects of the conductive additive and electrolyte compositions are still not well understood. This work focuses on a systematic, experimental approach in a static EFC configuration to build a foundation for understanding the electrochemical properties of different conductive additives and electrolytes. Specifically, different conductive additive morphologies (0D, 1D, and 2D nanoparticles) and loadings are examined through electrochemical and rheological lenses to relate electrochemical performance (rate-dependence, slurry conductivity, efficiency) to pumping losses (viscosity). Meanwhile, different electrolyte species (varying ion valency, size, and pH) at different ionic strengths (concentrations) are investigated through electrochemical testing to determine relationships between intrinsic electrolyte parameters and ionic strength of the electrolyte relative to the overall rate-dependence, resistivity, and efficiency of the slurry. This work provides a foundation for future work regarding flowable electrode optimization by demonstrating the drastic changes that these components (conductive additives, electrolytes) can have on electrochemical performance.
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Details
- Title
- Understanding the role of slurry electrode components on electrochemical performance
- Creators
- Devon Eichfeld - DU
- Contributors
- Emin C. Kumbur (Advisor) - Drexel University (1970-)
- Awarding Institution
- Drexel University
- Degree Awarded
- Master of Science (M.S.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Number of pages
- ix, 69 pages
- Resource Type
- Thesis
- Language
- English
- Academic Unit
- College of Engineering (1970-2026); Mechanical Engineering (and Mechanics) [Historical]; Drexel University
- Other Identifier
- 8291; 991014632557304721