AI Article Synopsis
- Researchers developed a new composite membrane by combining poly(vinylidene fluoride) (PVDF) with magnesium carbonate hydroxide (MCH) nanofibers, aiming to enhance lithium-ion battery (LIB) performance and safety.
- The composite membrane shows exceptional properties, including high porosity (85.9%), excellent electrolyte wettability (539.8%), improved ionic conductivity (1.4 mS·cm), and lower interfacial resistance (93.3 Ω), outperforming traditional membranes.
- It remains stable up to 180 °C, reducing the risk of thermal runaway, and exhibits better charge-discharge performance and flame resistance when tested in high-temperature environments.
Article Abstract
Simultaneously high-rate and high-safety lithium-ion batteries (LIBs) have long been the research focus in both academia and industry. In this study, a multifunctional composite membrane fabricated by incorporating poly(vinylidene fluoride) (PVDF) with magnesium carbonate hydroxide (MCH) nanofibers was reported for the first time. Compared to commercial polypropylene (PP) membranes and neat PVDF membranes, the composite membrane exhibits various excellent properties, including higher porosity (85.9%) and electrolyte wettability (539.8%), better ionic conductivity (1.4 mS·cm), and lower interfacial resistance (93.3 Ω). It can remain dimensionally stable up to 180 °C, preventing LIBs from fast internal short-circuiting at the beginning of a thermal runaway situation. When a coin cell assembled with this composite membrane was tested at a high temperature (100 °C), it showed superior charge-discharge performance across 100 cycles. Furthermore, this composite membrane demonstrated greatly improved flame retardancy compared with PP and PVDF membranes. We anticipate that this multifunctional membrane will be a promising separator candidate for next-generation LIBs and other energy storage devices, in order to meet rate and safety requirements.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10611082 | PMC |
| http://dx.doi.org/10.3390/polym15204120 | DOI Listing |
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