Hybrid separator containing reactive, nanostructured alumina promoting in-situ gel electrolyte formation for lithium-ion batteries with good cycling stability and enhanced safety
- Title
- Hybrid separator containing reactive, nanostructured alumina promoting in-situ gel electrolyte formation for lithium-ion batteries with good cycling stability and enhanced safety
- Author
- 김동원
- Keywords
- Reactive alumina; Gel electrolyte; Lithium-ion cell; Enhanced safety; Cycling performance
- Issue Date
- 2020-10
- Publisher
- ELSEVIER
- Citation
- JOURNAL OF POWER SOURCES, v. 472, no. 228519, page. 1-9
- Abstract
- The thermal instability of conventional polyolefin separators and the high flammability of organic electrolytes are the primary safety-related concerns of high-energy-density lithium-ion batteries. To address these issues, reactive Al2O3 nanostructured materials are coated onto a polyethylene (PE) separator to promote the formation of gel electrolyte and enhance the thermal stability of the separator. The Al2O3 nanostructured materials are surface-treated by 3-methacryloxypropyl trimethoxysilane to induce radical polymerization with tetra(ethylene glycol) diacrylate (TEGDA) in liquid electrolyte. The three-dimensional network formed by cross-linking reactive alumina nanostructured materials and TEGDA reduces the electrolyte leakage from the cell and enhances the interfacial adhesion between separator and electrodes. Thermal shrinkage of the reactive alumina-coated separator is also significantly reduced at 140 degrees C, providing enhanced thermal stability. In addition to improved thermal safety, lithium-ion cells employing a reactive alumina-coated PE separator exhibit stable cycling at both ambient and high temperatures.
- URI
- https://www.sciencedirect.com/science/article/pii/S0378775320308235?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/172038
- ISSN
- 0378-7753; 1873-2755
- DOI
- 10.1016/j.jpowsour.2020.228519
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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