Advanced Membranes最新文献_第7页

Advanced bipolar membranes with earth-abundant water dissociation catalysts for durable ampere-level water electrolysis 先进的双极膜与地球丰富的水解离催化剂持久安培级水电解

Advanced Membranes

Pub Date : 2025-01-01 Epub Date: 2025-05-08 DOI: 10.1016/j.advmem.2025.100152

Fanglin Duan, Xiaojiang Li, Fen Luo, Tingkun Li, Weisheng Yu, Liang Wu, Tongwen Xu

Green hydrogen production via water electrolysis is a crucial pathway for sustainable energy generation. Bipolar membrane water electrolysis (BPMWE) offers several advantages, including kinetically optimal electrode reactions across pH gradients and reduced component costs. However, challenges such as high overpotential of the BPM for water dissociation (WD) and the need for long-term stability in industrial setting hinder BPMWE development. While various metal oxide catalysts have been explored to reduce WD overpotential in BPMs, the effect of different crystalline phases of interfacial catalysts on BPM performance remains poorly understood. In this study, we investigate the catalytic effects of three titanium dioxide (TiO₂) phases—anatase, rutile, and amorphous—as interfacial catalysts in BPMs. The electrochemical tests reveal that rutile TiO₂, with its uniform dispersion and minimal aggregation, offers excellent WD efficiency. The BPM incorporating rutile TiO₂ achieves current densities of 2300 mA cm⁻² in pure water electrolysis and 4500 mA cm⁻² in acid-base electrolysis at 3 V and 80 °C. Furthermore, in a flow-cell electrolyzer, it sustains stable operation for 200 h at 1000 mA cm⁻². This work addresses critical challenges in BPM development, advancing BPMWE technology and supporting the potential for industrial-scale hydrogen production, thereby willing to contribute to the transition to sustainable energy solutions.

水电解绿色制氢是可持续能源生产的重要途径。双极膜电解（BPMWE）具有几个优点，包括跨pH梯度的动力学最佳电极反应和降低组件成本。然而，BPM用于水解离（WD）的高过电位以及工业环境中对长期稳定性的需求等挑战阻碍了BPMWE的发展。虽然已经探索了各种金属氧化物催化剂来降低BPM中的WD过电位，但界面催化剂的不同晶相对BPM性能的影响仍然知之甚少。在这项研究中，我们研究了三种二氧化钛（TiO2）相——锐钛矿、金红石和无定形——作为界面催化剂在bpm中的催化作用。电化学测试表明，金红石型TiO2具有分散均匀、团聚最小的特点，具有优异的WD效率。含金红石型TiO2的BPM在3v和80°C条件下，纯水电解电流密度为2300 mA cm - 2，酸碱电解电流密度为4500 mA cm - 2。此外，在流动电池电解槽中，它可以在1000毫安厘米−2下稳定运行200小时。这项工作解决了BPM开发中的关键挑战，推进了BPMWE技术，并支持了工业规模制氢的潜力，从而愿意为向可持续能源解决方案的过渡做出贡献。

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引用次数: 0

Incorporating polyvinylpyrrolidone modified HOF-101 into Pebax membranes for efficient toluene/N2 separation 将聚乙烯吡咯烷酮改性的HOF-101加入Pebax膜中进行甲苯/氮气的高效分离

Advanced Membranes

Pub Date : 2025-01-01 Epub Date: 2025-01-19 DOI: 10.1016/j.advmem.2025.100127

Jiating Liu , Jiashuai Zhao , Yuhan Wang , Mengqi Bie , Yuhang Guo , Yanxiong Ren , Ming Xue , Chuanruo Yang , Fusheng Pan , Taotao Gao , Zhongyi Jiang

Hybrid membranes hold great promise in the recovery of volatile organic compounds (VOCs). Hydrogen-bonded organic framework (HOF), a class of hydrogen-bonded crystalline porous materials with high affinity toward VOCs, holds great potential as an emerging filler. In this study, highly stable HOF-101 modified by Polyvinylpyrrolidone (PVP) and introduced into polyether block amide (Pebax®1657) to prepare hybrid membrane. The π-conjugated large aromatic ring structure of HOF-101 promoted the adsorption of toluene molecules. The interaction between the Pebax polymer chain segments and PVP on the modified HOF-101 surface enhanced their interfacial compatibility. At a PVP@HOF-101 content of 1 wt%, the hybrid membrane exhibited optimal separation performance for a 2.2 mol% toluene/N₂ mixture, with a permeability of 1.51 × 10⁻⁶ mol μm m⁻² s⁻¹ Pa⁻¹ for toluene, a selectivity of 954 and excellent stability over 120 h in the long-term experiment. This study demonstrates the application of HOF-based hybrid membranes for VOCs recovery.

杂化膜在回收挥发性有机化合物（VOCs）方面具有很大的前景。氢键有机骨架（HOF）是一类对VOCs具有高亲和力的氢键晶体多孔材料，是一种极具发展潜力的新型填料。本研究采用聚乙烯吡咯烷酮（PVP）修饰高稳定性的HOF-101，并将其引入聚醚阻断酰胺（Pebax®1657）中制备杂化膜。HOF-101的π共轭大芳环结构促进了对甲苯分子的吸附。改性HOF-101表面Pebax聚合物链段与PVP的相互作用增强了它们的界面相容性。当PVP@HOF-101质量分数为1 wt%时，该杂化膜对浓度为2.2 mol%的甲苯/N2混合物具有最佳的分离性能，对甲苯的渗透率为1.51 × 10−6 mol μm−2 s−1 Pa−1，选择性为954，长期实验稳定性为120 h。本研究展示了hof基杂化膜在VOCs回收中的应用。

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引用次数: 0

Electrostatically assembled core-shell particles and their reaction sintering for SiC membranes with improved oil/water separation and thermal regeneration efficiency 静电组装核壳粒子及其反应烧结SiC膜的油水分离和热再生效率提高

Advanced Membranes

Pub Date : 2025-01-01 Epub Date: 2025-05-05 DOI: 10.1016/j.advmem.2025.100148

Junyou Li , Qilin Gu , Huiqin Zhang , Zhaoxiang Zhong , Yiqun Fan , Weihong Xing

Porous SiC membranes prepared through the reaction sintering between the additive and surface oxidation generated silica have gained increasing attention in the fields of oil-water separation. Previous efforts mainly focused on the types and contents of additives incorporated by physically mixing process, while their distribution on the microstructure and separation performance of SiC membranes has been rarely involved. This work proposed to prepare SiC membranes by uniformly coating AlOOH sol on SiC particles via the electrostatic interaction and the subsequent reaction sintering of the derived SiC@alumina core-shell particles. It is found that the surface coating enabled the homogeneous dispersion of the additives in SiC powder matrix, which not only facilitated the reactive sintering process and notably reduced the amount of residual SiO₂ in SiC membranes, but also homogenized the pore structure. Also, the oxidation pathway of SiC had been altered, which substantially retarded the oxidation degree. Impressively, the as-prepared SiC membranes exhibited 20 % improvement in alkali resistance, and enhanced oil-in-water emulsion separation efficiency when compared with those prepared by the conventional mechanical mixing method. Besides, the fouled SiC membranes prepared from the core-shell units can be more efficiently regenerated by using the emerging Joule heating technique. The present work provides a facile and effective pathway to the preparation of high-performance SiC membranes through the reaction sintering of rationally designed core-shell particles for high-efficient separation.

将添加剂与表面氧化生成的二氧化硅反应烧结制备多孔碳化硅膜，在油水分离领域受到越来越多的关注。以往的研究主要集中在物理混合过程中加入添加剂的种类和含量，而添加剂的分布对SiC膜的微观结构和分离性能的影响较少。本文提出通过静电相互作用将AlOOH溶胶均匀涂覆在SiC颗粒上，并通过后续反应烧结得到SiC@alumina核壳颗粒，制备SiC膜。结果表明，表面涂层使添加剂均匀分散在SiC粉末基体中，有利于反应烧结过程的进行，显著降低了SiC膜中残余SiO2的含量，使孔结构均匀化。同时，碳化硅的氧化途径发生了改变，大大延缓了氧化程度。令人印象深刻的是，与传统的机械混合法制备的SiC膜相比，制备的SiC膜的耐碱性能提高了20%，分离油水乳液的效率也提高了。此外，利用新兴的焦耳加热技术可以更有效地再生由核壳单元制备的污染SiC膜。本研究为合理设计核壳颗粒反应烧结制备高性能SiC膜提供了一条简便有效的途径。

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引用次数: 0

Three-in-one polyimide-based blended membrane for Upgrading helium separation performance and physical aging resistance 三合一聚酰亚胺基共混膜提高氦分离性能和物理抗老化性能

Advanced Membranes

Pub Date : 2025-01-01 Epub Date: 2025-03-18 DOI: 10.1016/j.advmem.2025.100139

Bingbing Gao , Yiran Peng , Ming Wu , Hua Ma , Jianchao Sun , Peng Zhang , Xingzhong Cao , Like Ouyang , Xiaobin Fu , Chunfang Zhang , Yunxiang Bai , Lijun Liang , Yang Liu , Liangliang Dong

Polyimide membranes have attracted considerable attention for gas separation applications; however, achieving efficient helium (He) separation remains a significant challenge due to the low fractional free volume (FFV) and poorly controlled pore size distribution. Here, we report a novel three-in-one polyimide-based blended membrane constructed from a polymer (6FDA-TFMB) and alkynyl-based polyimide (EBPA-TB) matrix via thermal crosslinking. By carefully designing membrane synthesis and structure, the resulting membrane achieves the “1 + 1>2” effect: (i) high He selectivity derived from reinforced interphase adhesion and size-sieving ability due to the hydrogen bonding and similar structure between 6FDA-TFMB and EBPA-TB; (ii) high He permeability derived from the rigid cross-linked network distorting the EBPA-TB chain packing and generating additional free volume; (iii) high anti-aging performance derived from the thermal crosslinking preventing microstructural rearrangements. The optimal membrane an unprecedented combination of high He permeability (51.24 Barrer), excellent He/N₂ selectivity (146.40) and remarkable aging resistance (less than 3.97 % of permeability decrease over 50 days), outperforming the performance of state-of-the-art polyimide-based blended membranes for He purification. This three-in-one blended membrane construction strategy provides a general toolbox for the development of next-generation, high-performance blended membranes with desirable performance for diverse industrial applications.

聚酰亚胺膜在气体分离方面的应用引起了人们的广泛关注；然而，由于低分数自由体积（FFV）和孔隙大小分布控制不佳，实现高效氦（He）分离仍然是一个重大挑战。在这里，我们报道了一种新型的三合一聚酰亚胺基共混膜，由聚合物（6FDA-TFMB）和炔基聚酰亚胺（EBPA-TB）基质通过热交联构建而成。通过精心设计膜的合成和结构，所制备的膜实现了“1 + 1>2”效应：(1)由于6FDA-TFMB和EBPA-TB之间的氢键和相似的结构，增强了相间粘附和筛分能力，从而获得了高He选择性；（ii）由于刚性交联网络扭曲EBPA-TB链填料并产生额外的自由体积而产生的高He渗透率；（iii）高抗老化性能源于热交联防止微观结构重排。最佳膜具有前所未有的高He渗透率（51.24 Barrer），优异的He/N2选择性（146.40）和卓越的耐老化性（50天内渗透率下降低于3.97%），优于最先进的聚酰亚胺基混合膜用于He净化。这种三合一的混合膜结构策略为开发下一代高性能混合膜提供了一个通用工具箱，具有理想的性能，适用于各种工业应用。

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引用次数: 0

Review on molecular modeling-facilitated design of porous membranes 分子模拟促进多孔膜设计的研究进展

Advanced Membranes

Pub Date : 2025-01-01 Epub Date: 2025-04-10 DOI: 10.1016/j.advmem.2025.100145

Wei Yang , Meina Xiong , Dongliang Jin, Jing Zhong

Molecular modeling techniques are regarded as an effective approach to study various advanced membranes at the microscale. These investigations of porous membranes are devoted to better understanding their chemical structures, pore topology and morphology, transport/permeation mechanisms, and the structure-activity relationship. This review provides an overview of current research on the molecular simulations of the structure, gas-/liquid-phase transport, and phase behaviors in porous membranes. In more detail, quantum chemistry is first introduced to probe the structures of porous membranes at the molecular/atomistic level. In this part, the pore topology estimated by using the geometric algorithm is also presented. Transport properties of porous membranes determined using molecular dynamics are then summarized. To study the formation kinetics of membranes and the diffusion kinetics of fluids within membrane’s pores, free energy calculations are discussed. Moreover, the phase behaviors involved in the membrane process by Monte Carlo simulations are presented. Finally, a brief discussion of the multiscale simulations is provided to comprehensively understand the structure-activity relationship. These theoretical works pave constructive ways for the design of functional membranes used for separation and purification, energy harvesting and storage, petrochemical engineering, and so on.

分子模拟技术被认为是在微观尺度上研究各种先进膜的有效途径。这些多孔膜的研究致力于更好地了解它们的化学结构、孔隙拓扑和形态、传输/渗透机制以及构效关系。本文综述了多孔膜结构、气/液相输运和相行为的分子模拟研究现状。更详细地说，量子化学首次被引入到在分子/原子水平上探测多孔膜的结构。在这一部分中，还介绍了利用几何算法估计的孔隙拓扑结构。然后总结了用分子动力学方法测定多孔膜的输运特性。为了研究膜的形成动力学和膜孔内流体的扩散动力学，讨论了自由能的计算。此外，通过蒙特卡罗模拟给出了膜过程中所涉及的相行为。最后，对多尺度模拟进行了简要讨论，以全面了解结构-活动关系。这些理论工作为分离净化、能量收集与储存、石油化工等领域功能膜的设计提供了有益的途径。

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引用次数: 0

Endowing the nanostructured ion channels of anion conductive membranes with negative charge to boost the Cl−/SO42− ion separation via electrodialysis 在阴离子导电膜的纳米离子通道中赋予负电荷，促进电渗析对Cl - /SO42 -离子的分离

Advanced Membranes

Pub Date : 2025-01-01 Epub Date: 2025-01-17 DOI: 10.1016/j.advmem.2025.100128

Wenlong Ding , Haoyu Liu , Jiayi Liao , Tongtong Wang , Dongze Li , Yu Xu , Shiyu Zhou , Zhiqiang Wu , Wenhui Shi , Jiangnan Shen , Junbin Liao

Construction of homogeneous polymer ion-exchange membranes (IEMs) with suitable ion transport channels and stable structures is crucial to the separation of mono-/multi-valent anions. Amphoteric ion-exchange membrane (AIEM) is a special type of IEM that possesses unique properties due to the presence of both anion exchange groups and cation exchange groups. In this work, we have grafted 1-bromoheptane and 3-bromopropanesulfonate onto the poly(aryl ether sulfone) chain through nucleophilic substitution reactions. Unlike the IEM attaching different ion-change functional groups onto one side-chain, this kind of AIEM bears two kinds of ion-change functional groups on dual side-chains. The results show that the as-prepared AIEMs could maintain low water absorption (<20 %) and swelling ratios (<11 %). The optimal surface area resistance is 6.31 Ω∙cm². The perm-selectivity (Cl⁻/SO₄²⁻) of the optimized PAES-TA/BS-0.85 AIEMs in a binary mixed solution system at 2.5 mA∙cm² could be achieved as high as 67.46, which is much higher than commercial ACS IEMs under the same conditions. Small Angle X-ray scattering reveals a distinct phase separation pattern within the AIEM matrix, which is due to the introduction of sulfonates to increase the hydrophilicity of the side-chains. The combined effects of pore size screening and electrostatic repulsion render the high selectivity of as-prepared AIEMs.

构建具有合适离子传输通道和稳定结构的均相聚合物离子交换膜是分离单价/多价阴离子的关键。两性离子交换膜（两性离子交换膜）是一种特殊类型的离子交换膜，由于同时存在阴离子交换基和阳离子交换基而具有独特的性能。在这项工作中，我们通过亲核取代反应将1-溴庚烷和3-溴丙磺酸接枝到聚芳醚砜链上。与IEM在一个侧链上附着不同的离子变化官能团不同，这种AIEM在双侧链上具有两种离子变化官能团。结果表明，制备的aiem能保持较低的吸水率（20%）和溶胀率（11%）。最佳表面积电阻为6.31 Ω∙cm2。优化后的PAES-TA/BS-0.85 AIEMs在2.5 mA∙cm2的二元混合溶液体系中的选择性（Cl−/SO42−）高达67.46，远高于同等条件下的商用ACS IEMs。小角度x射线散射揭示了AIEM基体中明显的相分离模式，这是由于引入了磺酸盐来增加侧链的亲水性。孔径筛选和静电斥力的共同作用使得制备的aiem具有较高的选择性。

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引用次数: 0

Hybrid energy harvesting enabled by a covalent organic framework membrane 由共价有机框架膜实现混合能量收集

Advanced Membranes

Pub Date : 2025-01-01 Epub Date: 2025-01-24 DOI: 10.1016/j.advmem.2025.100130

Jiaming Yi, Zhuozhi Lai, Qing Guo, Zhiwei Xing, Qi Sun

The integration of water and thermal energy harvesting presents a promising solution to the intermittency issues associated with individual energy sources. In this study, we show a covalent organic framework (COF) membrane featuring subnanometer, one-dimensional ionic channels, which demonstrate remarkable stability in both acidic and saline environments. The membrane exhibits exceptional permselectivity across various electrolyte solutions, enabling efficient osmotic energy harvesting from proton gradients via reverse electrodialysis. Under a 50-fold concentration gradient of H₂SO₄, the membrane achieved a peak output power density of 97.1 W m⁻². Furthermore, the membrane facilitates thermo-osmotic energy conversion by selectively screening ionic charges driven by combined salinity and temperature gradients. Under simulated estuarine salinity conditions and a 30 K temperature gradient, the COF membrane achieved a maximum output power density of 91.4 W m⁻²—an 18-fold increase compared to the commercial benchmark (5 W m⁻²). This study underscores the significant potential of COF membranes for efficient energy conversion, enabling the effective harvesting of untapped osmotic and low-grade heat energy.

水和热能收集的整合为解决与单个能源相关的间歇性问题提供了一个有希望的解决方案。在这项研究中，我们展示了一种具有亚纳米、一维离子通道的共价有机框架（COF）膜，它在酸性和盐水环境中都表现出显著的稳定性。该膜在各种电解质溶液中表现出优异的透选择性，通过反电渗析从质子梯度中高效地收集渗透能量。在H2SO4浓度梯度为50倍的条件下，膜的峰值输出功率密度为97.1 W m−2。此外，该膜通过选择性地筛选由盐度和温度梯度驱动的离子电荷，促进热渗透能量转换。在模拟河口盐度条件和30 K温度梯度下，COF膜的最大输出功率密度为91.4 W m−2，比商业基准（5 W m−2）增加了18倍。这项研究强调了COF膜在高效能量转换方面的巨大潜力，能够有效地收集未开发的渗透和低品位热能。

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引用次数: 0

Robust methoxy-based covalent organic frameworks membranes enable efficient near-molecular-weight selectivity 稳健的甲氧基共价有机框架膜实现了高效的近分子量选择性

Advanced Membranes

Pub Date : 2025-01-01 Epub Date: 2024-12-03 DOI: 10.1016/j.advmem.2024.100112

Yanqing Xu , Jiaqi Xiong , Chenfei Lin , Yixiang Yu , Qite Qiu , Junbin Liao , Huimin Ruan , Arcadio Sotto , Jiangnan Shen

Uniform pore size is essential for molecular sieving in separation membranes. Traditional nanofiltration (NF) polymer membranes struggle with precise structure control due to random chain packing and rapid cross-linking, leading to varied pore sizes and poor molecular discrimination. Covalent organic frameworks (COFs) offer ordered porous structures for enhanced molecular selectivity. We synthesized composite COFs membranes with triphenylamine derivatives through interfacial polymerization, adjusting pore channel functional groups to achieve high water permeance and size-selective molecule retention. The TFB-OMe-TAPA COFs membrane demonstrated sharp rejection profiles, separating solutes of different molecular sizes. A three-stage cascade process was used to fractionate binary molecules with varying charges, achieving a separation factor of 26.7 for heterogeneous charge molecules. This work reveals the selectivity of COF membranes in near-molecular-weight systems, expanding their potential in molecular separations.

均匀的孔径对分离膜的分子筛分至关重要。传统的纳滤聚合物膜由于无序链填充和快速交联，难以精确控制结构，导致孔径大小不一，分子识别能力差。共价有机框架（COFs）提供有序的多孔结构，以增强分子选择性。我们通过界面聚合，调整孔隙通道官能团，合成了具有三苯胺衍生物的复合COFs膜，以实现高透水性和大小选择性分子保留。TFB-OMe-TAPA COFs膜具有明显的分离特性，可分离不同分子大小的溶质。采用三级级联工艺对不同电荷的二元分子进行分馏，对非均相电荷分子的分离系数为26.7。这项工作揭示了COF膜在近分子量体系中的选择性，扩大了它们在分子分离中的潜力。

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引用次数: 0

Porous organic cage separation membranes: Exploratory journey from preparation to application 多孔有机笼分离膜：从制备到应用的探索之旅

Advanced Membranes

Pub Date : 2025-01-01 Epub Date: 2024-12-25 DOI: 10.1016/j.advmem.2024.100125

Zhihao Song , Ying Wang , Zhiyuan Zha , Zhi Wang , Song Zhao

Porous organic cages (POCs) represent a novel class of low-density crystalline materials that exhibit distinctive pores comparable to those observed in three-dimensional extended network materials, including metal organic frameworks (MOFs), covalent organic frameworks (COFs), and porous organic polymers (POPs). Owing to their adjustable pore sizes, high specific surface areas, and discrete molecular structures, POCs exhibit excellent solution dispersibility and processability, thereby providing a broad spectrum of potential strategies for the design and fabrication of POC separation membranes. This review presents a comprehensive and systematic summary of the recent research progress in the preparation techniques and applications of POC separation membranes. We summarize a comprehensive overview of preparation strategies for POC separation membranes, including physical blending, spin coating, and interfacial polymerization, and analyze their advantages and limitations. Recent developments in the separation applications of POC separation membranes are highlighted, such as gas separation, ion separation and molecular separation, as well as current challenges and future development trends in this field, are briefly discussed. We anticipate that this review will offer a pertinent perspective to promote advancements in the development of advanced POC separation membranes, and be useful to researchers in related fields.

多孔有机笼（POCs）是一类新型的低密度晶体材料，具有与三维扩展网络材料（包括金属有机框架（MOFs）、共价有机框架（COFs）和多孔有机聚合物（pop））相似的独特孔隙。由于其可调节的孔径、高比表面积和离散的分子结构，POC具有优异的溶液分散性和可加工性，从而为POC分离膜的设计和制造提供了广泛的潜在策略。本文对聚氯乙烯分离膜的制备技术及其应用的最新研究进展进行了全面系统的综述。本文综述了聚氯乙烯分离膜的制备策略，包括物理共混、自旋涂层和界面聚合，并分析了它们的优点和局限性。重点介绍了POC分离膜在气体分离、离子分离和分子分离等分离应用领域的最新进展，并简要讨论了该领域目前面临的挑战和未来的发展趋势。我们希望本文的综述能够为推进先进POC分离膜的开发提供一个有针对性的视角，并对相关领域的研究人员有所帮助。

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引用次数: 0

Thermally stable polyamide-imide (PAI) hierarchical porous separator for lithium metal batteries 用于锂金属电池的热稳定聚酰胺-亚胺（PAI）分层多孔分离器

IF 9.5

Advanced Membranes

Pub Date : 2025-01-01 Epub Date: 2025-08-28 DOI: 10.1016/j.advmem.2025.100168

Qinghai Chen , Zhiguang Zhang , Yingda Huang , Aiting Liu , Hao Wang , Rongfei Zhou , Shuanyan Kang , Junfen Li , Nanwen Li

Although the structural design and physicochemical characteristics of separators are critical determinants of lithium metal batteries safety and overall performance, commercial polyolefin separators exhibit inherent limitations in thermal stability, porosity and electrolyte wettability. These deficiencies not only elevate the propensity for battery safety incidents but also severely compromise ionic transport capability and cycling performance. Herein, we have designed and synthesized a high molecular weight polyamide-imide (PAI) polymer by one-step polymerization, and subsequently prepared a PAI separator with high thermal stability, high porosity and excellent electrolyte wettability using vapor-induced phase separation. Specifically, thermal stability testing has confirmed that PAI separators maintain structural integrity at temperature as high as 240 °C. Additionally, a bi-continuous sponge-like structure with high porosity (86 %) has been achieved by controlling the phase inversion parameters, and the abundant porous structure has facilitated ion transport. Thus, the PAI separators exhibit an ionic conductivity of 1.67 mS cm⁻¹ and a lithium ions transference number of 0.64. Importantly, the polar amide and imide groups in the PAI molecular structure have further ensured excellent electrolyte wettability of the PAI separator, which has resulted in high electrolyte uptake (326 %). As a result, LFP/Li batteries with PAI separators exhibit superior rate performance (147 mAh g⁻¹ at 1 C) and excellent capacity retention (78.6 % at 200 cycles) which are better than that of the commercial PE separator. This investigation reveals that the organic soluble and thermal stable PAI material could be excellent lithium metal batteries separator candidates to improve the safety and comprehensive performance.

尽管隔膜的结构设计和物理化学特性是锂金属电池安全性和整体性能的关键决定因素，但商用聚烯烃隔膜在热稳定性、孔隙度和电解质润湿性方面存在固有的局限性。这些缺陷不仅增加了电池发生安全事故的可能性，而且严重影响了离子传输能力和循环性能。本研究通过一步聚合法设计合成了一种高分子量的聚酰胺-亚胺（PAI）聚合物，并利用气相分离技术制备了具有高热稳定性、高孔隙率和优异电解质润湿性的PAI分离器。具体来说，热稳定性测试已经证实PAI分离器在高达240°C的温度下保持结构完整性。通过控制相变参数，获得了高孔隙率（86%）的双连续海绵状结构，丰富的多孔结构有利于离子的输运。因此，PAI隔膜的离子电导率为1.67 mS cm−1，锂离子转移数为0.64。重要的是，PAI分子结构中的极性酰胺和亚胺基团进一步确保了PAI分离器优异的电解质润湿性，这导致了高电解质吸收率（326%）。结果表明，采用PAI隔膜的LFP/Li电池具有优于商用PE隔膜的倍率性能（1℃时147 mAh g−1）和优良的容量保持率（200次循环时78.6%）。研究表明，有机可溶且热稳定的PAI材料可以作为锂金属电池隔膜的优良候选材料，提高其安全性和综合性能。

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引用次数: 0