Abstract
Separators with excellent thermal stability and electrolyte wettability are essential for high-energy-density lithiumion batteries (LIBs). In this study, polybenzimidazole (PBI) nanofiber membranes were prepared by electrospinning and subsequent thermal calendering for a high-temperature resistance and flame-retardant LIB separator. The PBI nanofiber membrane calendered at 120 oC (PBI-120) was evaluated as an LIB separator due to its overall good physical properties. PBI- 120 showed better thermal dimensional stability, electrochemical stability, ionic conductivity, and interfacial compatibility with the electrodes than did a commercial separator, Celgard 2400. The cell assembled with PBI-120 showed stable chargedischarge profiles and cycle performance. The PBI nanofiber separator was demonstrated to be a promising separator candidate for enhanced safety and electrical performance of high-energy-density LIBs.
| Original language | English |
|---|---|
| Pages (from-to) | 993-998 |
| Number of pages | 6 |
| Journal | Fibers and Polymers |
| Volume | 21 |
| Issue number | 5 |
| DOIs | |
| State | Published - 1 May 2020 |
Bibliographical note
Publisher Copyright:© 2020, The Korean Fiber Society.
Keywords
- Lithium-ion batteries
- Nanofibers
- Polybenzimidazole
- Separator
- Thermal stability
