Thermally Stable, Ion-Regulating Aramid Nanofiber-Polyacrylamide Modified Separator Enabling Safe and High-Performance Lithium Metal Batteries

Tianyang Yu; Xue Pang; Teng Zhao; Ke Wang; Wangming Tang; Anqi Zhao; Chenxi Xu; Nan Chen; Li Li; Feng Wu; Renjie Chen

doi:10.1002/adfm.202523631

Thermally Stable, Ion-Regulating Aramid Nanofiber-Polyacrylamide Modified Separator Enabling Safe and High-Performance Lithium Metal Batteries

Tianyang Yu
, Xue Pang
, Teng Zhao^*
, Ke Wang
, Wangming Tang
, Anqi Zhao
, Chenxi Xu
, Nan Chen
, Li Li
, Feng Wu
, Renjie Chen^*

^*此作品的通讯作者

材料学院

Beijing Institute of Technology

科研成果: 期刊稿件 › 文章 › 同行评审

4 引用（Scopus）

摘要

Lithium metal batteries (LMBs) face critical challenges such as unstable solid electrolyte interphase (SEI), dendritic lithium growth, and transition metal dissolution from high-nickel cathodes, which compromise cycling stability and safety. To address these issues, a multifunctional composite separator is developed by constructing an aramid nanofiber (ANF)-polyacrylamide (PAM) hybrid layers on PP separators. The ANF-PAM@PP separator exhibits exceptional thermal stability, mechanical robustness, and uniform pore structure, enabling homogeneous Li-ion flux distribution and suppressed dendrite initiation. The PAM is rich in amide groups and effectively chelates dissolved transition metal ions via coordination bonding, reducing SEI degradation and electrolyte decomposition. Density functional theory (DFT) calculations confirm strong metal ion adsorption on ANF-PAM due to high binding energies. Li||Li symmetric cells with the modified separator achieve stable cycling for >1000 h at 2 mA cm⁻², while Li||NCM811 cells retain 81.8% capacity after 150 cycles at 3C. This work provides a scalable strategy for designing high-performance separators to enable durable and safe LMBs.

源语言	英语
文章编号	e23631
期刊	Advanced Functional Materials
卷	36
期	20
DOI	https://doi.org/10.1002/adfm.202523631
出版状态	已出版 - 9 3月 2026

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@article{b33aa87b63844bfbbc705728f71c338d,

title = "Thermally Stable, Ion-Regulating Aramid Nanofiber-Polyacrylamide Modified Separator Enabling Safe and High-Performance Lithium Metal Batteries",

abstract = "Lithium metal batteries (LMBs) face critical challenges such as unstable solid electrolyte interphase (SEI), dendritic lithium growth, and transition metal dissolution from high-nickel cathodes, which compromise cycling stability and safety. To address these issues, a multifunctional composite separator is developed by constructing an aramid nanofiber (ANF)-polyacrylamide (PAM) hybrid layers on PP separators. The ANF-PAM@PP separator exhibits exceptional thermal stability, mechanical robustness, and uniform pore structure, enabling homogeneous Li-ion flux distribution and suppressed dendrite initiation. The PAM is rich in amide groups and effectively chelates dissolved transition metal ions via coordination bonding, reducing SEI degradation and electrolyte decomposition. Density functional theory (DFT) calculations confirm strong metal ion adsorption on ANF-PAM due to high binding energies. Li||Li symmetric cells with the modified separator achieve stable cycling for >1000 h at 2 mA cm−2, while Li||NCM811 cells retain 81.8\% capacity after 150 cycles at 3C. This work provides a scalable strategy for designing high-performance separators to enable durable and safe LMBs.",

keywords = "aramid nanofiber, lithium metal battery, polyacrylamide, solid-electrolyte interphase, surface coating",

author = "Tianyang Yu and Xue Pang and Teng Zhao and Ke Wang and Wangming Tang and Anqi Zhao and Chenxi Xu and Nan Chen and Li Li and Feng Wu and Renjie Chen",

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T1 - Thermally Stable, Ion-Regulating Aramid Nanofiber-Polyacrylamide Modified Separator Enabling Safe and High-Performance Lithium Metal Batteries

AU - Yu, Tianyang

AU - Pang, Xue

AU - Zhao, Teng

AU - Wang, Ke

AU - Tang, Wangming

AU - Zhao, Anqi

AU - Xu, Chenxi

AU - Chen, Nan

AU - Li, Li

AU - Wu, Feng

AU - Chen, Renjie

PY - 2026/3/9

Y1 - 2026/3/9

N2 - Lithium metal batteries (LMBs) face critical challenges such as unstable solid electrolyte interphase (SEI), dendritic lithium growth, and transition metal dissolution from high-nickel cathodes, which compromise cycling stability and safety. To address these issues, a multifunctional composite separator is developed by constructing an aramid nanofiber (ANF)-polyacrylamide (PAM) hybrid layers on PP separators. The ANF-PAM@PP separator exhibits exceptional thermal stability, mechanical robustness, and uniform pore structure, enabling homogeneous Li-ion flux distribution and suppressed dendrite initiation. The PAM is rich in amide groups and effectively chelates dissolved transition metal ions via coordination bonding, reducing SEI degradation and electrolyte decomposition. Density functional theory (DFT) calculations confirm strong metal ion adsorption on ANF-PAM due to high binding energies. Li||Li symmetric cells with the modified separator achieve stable cycling for >1000 h at 2 mA cm−2, while Li||NCM811 cells retain 81.8% capacity after 150 cycles at 3C. This work provides a scalable strategy for designing high-performance separators to enable durable and safe LMBs.

AB - Lithium metal batteries (LMBs) face critical challenges such as unstable solid electrolyte interphase (SEI), dendritic lithium growth, and transition metal dissolution from high-nickel cathodes, which compromise cycling stability and safety. To address these issues, a multifunctional composite separator is developed by constructing an aramid nanofiber (ANF)-polyacrylamide (PAM) hybrid layers on PP separators. The ANF-PAM@PP separator exhibits exceptional thermal stability, mechanical robustness, and uniform pore structure, enabling homogeneous Li-ion flux distribution and suppressed dendrite initiation. The PAM is rich in amide groups and effectively chelates dissolved transition metal ions via coordination bonding, reducing SEI degradation and electrolyte decomposition. Density functional theory (DFT) calculations confirm strong metal ion adsorption on ANF-PAM due to high binding energies. Li||Li symmetric cells with the modified separator achieve stable cycling for >1000 h at 2 mA cm−2, while Li||NCM811 cells retain 81.8% capacity after 150 cycles at 3C. This work provides a scalable strategy for designing high-performance separators to enable durable and safe LMBs.

KW - aramid nanofiber

KW - lithium metal battery

KW - polyacrylamide

KW - solid-electrolyte interphase

KW - surface coating

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DO - 10.1002/adfm.202523631

M3 - Article

AN - SCOPUS:105021271333

SN - 1616-301X

VL - 36

JO - Advanced Functional Materials

JF - Advanced Functional Materials

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ER -

Thermally Stable, Ion-Regulating Aramid Nanofiber-Polyacrylamide Modified Separator Enabling Safe and High-Performance Lithium Metal Batteries

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