Files and links (1)
CC BY V4.0, Open Access
Thesis
AMINO ACID AS A MULTIFUNCTIONAL ELECTROLYTE ADDITIVE FOR ENHANCING LITHIUM-SULFUR BATTERY PERFORMANCE
Washington State University
Master of Science (MS), Washington State University
12/2024
DOI:
https://doi.org/10.7273/000007216
Abstract
Owing to their ultrahigh theoretical capacity and energy density, lithium-sulfur (Li-S) batteries are among the most promising candidates for advanced energy storage technology. However, their commercial viability is bottlenecked by the sluggish redox kinetics of sulfur and the notorious polysulfide shuttle effect. To curtail these issues, employing functional electrolyte additives is an effective strategy, but the materials used are often costly, unabundant, or environmentally harmful. Thus, pursuing renewable bioderived alternatives is desirable.
This thesis studies the application of a single amino acid, L-leucine (Leu), as a liquid electrolyte additive to improve the redox kinetics of sulfur and reduce polysulfide shuttling, thereby enhancing battery performance. With an ultralow dosage of 0.1 wt%, the additive significantly increases the wettability of the electrolyte on the separator and facilitates Li+ transport. Leu also exhibits a catalytic effect on the conversion of soluble Li2Sx to solid Li2S, effectively combating the shuttle effect. Consequently, Li-S cells with the Leu additive display improved rate performance and higher discharge capacities during cycling. This study showcases the novel and facile application of an abundant amino acid, opening avenues for further investigation into bio-derived electrolyte additives for Li-S batteries.
Metrics
1 File views/ downloads
4 Record Views
Details
- Title
- AMINO ACID AS A MULTIFUNCTIONAL ELECTROLYTE ADDITIVE FOR ENHANCING LITHIUM-SULFUR BATTERY PERFORMANCE
- Creators
- Justin Zhong
- Contributors
- Weihong (Katie) Zhong (Chair)Jin Liu (Committee Member)Min-Kyu Song (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- School of Mechanical and Materials Engineering
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University
- Number of pages
- 54
- Identifiers
- 99901195439201842
- Language
- English
- Resource Type
- Thesis