Thesis
Poly(vinylidene fluoride)-based polymer blends as high-performance binders for lithium-ion batteries
Washington State University
Master of Science (MS), Washington State University
2018
Handle:
https://hdl.handle.net/2376/101548
Abstract
As the development of battery technology, electrodes with stable and controllable microstructures are increasingly demanding, in particular for those active materials experiencing high-volume change during cycling. Achieving uniform and stable microstructures of electrodes with the help of binders becomes an important task in battery research. Compared with synthesis of new polymers for binders, polymer blends provide a low cost, efficient, and facile way to combine the advantages of different polymers for high-performance binder systems. In this study, we focused on improving the performance of poly(vinylidene fluoride) (PVDF) binder via blending it with polyethylene-block-poly(ethylene glycol) (PE-PEG), poly(propylene carbonates) (PPC), and ultra-high molecular weight of poly(ethylene oxide) (PEO). The co-polymer PE-PEG also acting as a surfactant improves the dispersion of carbon black and results in a more uniform electrode with better electron conduction network. As an amorphous polymer, PPC also has good affinity to liquid electrolytes. All the resulting electrodes have improved interaction between its components. PEO shows the best compatibility with PVDF so that it does not only improve the electrochemical performance, but also mechanical flexibility, electrolyte wettability, and charge transport of the final electrodes.
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Details
- Title
- Poly(vinylidene fluoride)-based polymer blends as high-performance binders for lithium-ion batteries
- Creators
- Min Zheng
- Contributors
- Weihong Zhong (Degree Supervisor)Louis Scudieor (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Mechanical and Materials Engineering, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525289301842
- Language
- English
- Resource Type
- Thesis