Effects of an Integrated Separator/Electrode Assembly on Enhanced Thermal Stability and Rate Capability of Lithium-Ion Batteries
| Autor: | Hyunkyu Jeon, Yong Min Lee, Myung-Hyun Ryou, Seokhyeon Gong, Hoogil Lee |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Separator (oil production) 02 engineering and technology Polyethylene engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Coating Electrode engineering Ionic conductivity General Materials Science Thermal stability Adhesive Composite material 0210 nano-technology |
| Zdroj: | ACS applied materialsinterfaces. 9(21) |
| ISSN: | 1944-8252 |
| Popis: | To improve the rate capability and safety of lithium-ion batteries (LIBs), we developed an integrated separator/electrode by gluing polyethylene (PE) separators and electrodes using a polymeric adhesive (poly(vinylidene fluoride), PVdF). To fabricate thin and uniform polymer coating layers on the substrate, we applied the polymer solution using a spray-coating technique. PVdF was chosen because of its superior mechanical properties and stable electrochemical properties within the voltage range of commercial LIBs. The integrated separator/electrode showed superior thermal stability compared to that of the control PE separators. Although PVdF coating layers partially blocked the porous structures of the PE separators, resulting in reduced ionic conductivity (control PE = 0.666 mS cm–1, PVdF-coated PE = 0.617 mS cm–1), improved interfacial properties between the separators and the electrodes were obtained due to the intimate contact, and the rate capabilities of the LIBs based on integrated separators/electr... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|