Thesis
Crosslinked poly(ethylene glycol)-based hybrid electrolytes for lithium-metal polymer batteries
Master of Science (M.S.), Drexel University
Jun 2016
DOI:
https://doi.org/10.17918/etd-7818
Abstract
Lithium metal batteries, which use lithium metal as the anode, have the advantage of much higher energy density over the commercially used lithium-ion batteries with graphite as the anode. However, during repeated charge-discharge cycles, lithium dendrites may form due to uneven deposition of lithium on the lithium metal anode, and lithium dendrite growth induced short-circuits are always a problem preventing lithium-metal batteries from being used in a lot of applications. Using solid polymer electrolyte (SPE) for lithium metal batteries has the benefit of using the electrolyte as the electrode separator while inhibiting the growth of lithium dendrites. The current most significant issue for SPEs is low ionic conductivity at room temperature. Poly(ethylene glycol) (PEG) has been extensively used for SPE systems due to its strong lithium ion solvating ability and high dielectric constant. In this study, crosslinked PEG polymer electrolyte membranes were synthesized with different amount of plasticizers to produce samples with different ionic conductivities and mechanical properties. It was shown that, with the increase amount of small PEG molecules added, the ionic conductivities of the SPEs showed significant increase and mechanical properties decreases. Performance of the electrolytes was correlated with both properties, and the results were analyzed to propose the ideal design for PEG polymer electrolytes for lithium metal polymer batteries.
Metrics
54 File views/ downloads
19 Record Views
Details
- Title
- Crosslinked poly(ethylene glycol)-based hybrid electrolytes for lithium-metal polymer batteries
- Creators
- Ziyin Huang - DU
- Contributors
- Christopher Y. Li (Advisor) - Drexel University (1970-)
- Awarding Institution
- Drexel University
- Degree Awarded
- Master of Science (M.S.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Number of pages
- xiii, 100 pages
- Resource Type
- Thesis
- Language
- English
- Academic Unit
- Materials (Science and) Engineering (Metallurgical Engineering) (1970-2026); College of Engineering (1970-2026); Drexel University
- Other Identifier
- 7818; 991014632603404721