| Autor: |
Arum Jung, Michael J. Lee, Seung Woo Lee, Jinhan Cho, Jeong Gon Son, Bongjun Yeom |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Small (Weinheim an der Bergstrasse, Germany). 18(52) |
| ISSN: |
1613-6829 |
| Popis: |
The growth of lithium (Li) dendrites reduces the lifespan of Li-metal batteries and causes safety issues. Herein, hierarchically porous aramid nanofiber separators capable of effectively suppressing the Li dendrite growth while maintaining highly stable cycle performances at high charge/discharge rates are reported. A two-step solvent exchange process combined with reprotonation-mediated self-assembly is utilized to control the bimodal porous structure of the separators. In particular, when ethanol and water are used sequentially, aramid nanofibers form hierarchical porous structures containing nanopores in macroporous polymer frameworks to yield a mechanically robust membrane with high porosity of 97% or more. The optimized samples exhibit high ionic conductivities of 1.87-4.04 mS cm |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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