锂离子电池用多级ZnO-PMIA纳米纤维隔膜的制备及性能

doi:10.12066/j.issn.1007-2861.2672

Abstract

Abstract: Electrostatic spinning technology was utilized to fabricate a poly (m-phenylene isophthalamide) (PMIA) nanofiber membrane and innovatively incorporated lithiophilic ZnO nanosheets onto the heat-resistant PMIA nanofiber membrane, successfully constructing a hierarchically structured nanofiber composite separator. The incorporated ZnO nanosheets facilitated the in-situ formation of the Li-Zn alloy layer, directionally promoted uniform lithium deposition, and suppressed the growth of lithium dendrites. With this design, the prepared lithium-ion batteries (LIBs) used ZnO-PMIA composite separators achieved an ionic conductivity of 0.750 mS/cm and a low interfacial impedance of 244 $\Omega$. Consequently, LIBs equipped with the ZnO-PMIA-0.1M composite separators exhibited exceptional cycling stability at 0.5 C, maintaining a high specific capacity of 128.5 mA$\cdot$h/g after 100 cycles.

Key words: lithium-ion battery (LIB) separator, electrostatic spinning, poly (m-phenylene isophthalamide) (PMIA) nanofiber membrane, ZnO nanosheet, lithium dendrite inhibition

CLC Number:

TM912

WU Simin, HU Zuming, YU Junrong, WANG Yan, LI Na. Preparation and performance of multi-level ZnO-PMIA nanofiber separator for lithium-ion batteries[J]. Journal of Shanghai University（Natural Science Edition）, 2025, 31(4): 607-621.

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Preparation and performance of multi-level ZnO-PMIA nanofiber separator for lithium-ion batteries

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