1. 简介

阴离子交换膜（AEM）是一种通常由离聚物制成的半透膜，设计用于传导阴离子，同时不渗透诸如氧气或氢气的气体。阴离子交换膜的主要优点是使用非铂/低铂催化剂，在达到相同性能的前提下，可以大大降低成本，阴离子交换膜的其他优点还包括:耐碱、抗氧化、耐氯离子、扩散透析以回收酸。

科学材料站可以提供Xion AEM-Pention-18-5CL不同厚度尺寸系列，其中厚度有5μm, 10μm, 20μm, 30μm和50μm，尺寸有5x5cm, 10x10cm及15x15cm。更多型号将在厂家更新后提供。

如需购买请点进入方【购买渠道】进行购买或寻求报价单。

Xion-Pention复合阴离子交换膜是一系列复合阴离子交换膜（AEM），使用基于聚降冰片烯的树脂的复合而成，复合材料来自于与膜结构整合的增强层，用以提高其机械性能，机械性能的增强可以使复合膜比独立膜更薄，在不牺牲强度的情况下提供更高的离子导电性，其离子交换容量（IEC）为3.4-3.6meq/g，这些特制的阴离子交换膜依其厚度和交联度而定，已在碱性燃料电池中显示出高达9A/cm2的电流密度（或大于3 W/cm2的功率密度），具有出色的耐久性和寿命（以上数据基于美国可再生能源实验室、南卡罗来纳大学和乔治亚理工学院联合开展的研究，研究原文见文末或本站下载中心，所述的电化学性能数据仅供参考，并取决于MEA、CCM或GDE制造方法、使用的膜厚度、测试硬件设计和测试硬件中使用的组件以及操作参数（温度、压力、反应物流速等），这些值可能会或可能不会达到。）

季铵改性聚降冰片烯聚合物的化学成分如下图所示。

2. Xion-Pention聚合物

Xion-Pention复合阴离子交换膜的优点：

√ 高阴离子电导率

√ 在低温和高温下具有良好的化学稳定性

√ 具有优异机械强度的超薄膜

科学材料站目前提供72系列、35系列、18系列，交联度（Crosslinking）为5%和15%，厚度为5um、10um、20um、30um、50um厚度，尺寸为5cmX5cm、10cmX10cm、15cmX15cm、20cmX20cm的Xion-Pention阴离子交换膜片，由于所有这些膜产品都是经过机械增强的，因此特别适合于不加压或加压的阴离子交换膜燃料电池（带或不带碱性电解质），碱性燃料电池（带或不带碱性电解质），碱子泵，碱性氧浓缩器，碱性低氧和碱性电池或其他各种中性至碱性电化学装置。可以使用气态或液态反应物而不会出现任何问题。

选购说明：

1.当您的装置需要拥有最佳的效率并且整个膜上不会有太大的压差时。或者当反应物（燃料或氧化剂）以干燥气体（0％RH）或部分加湿（小于50％RH）的形式提供时。选用厚度较薄的膜（小于10um）可以在整个膜上提供出色的水传输，在阳极和阴极均保持足够的水合作用，因此，当燃料或氧化剂以干态供应时，过氧化氢自由基和其他对膜有害的自由基种类的产生减至最少或部分加湿。

2.当您的装置需要拥有很长的使用寿命，或者整个膜上有较大的压差，又或是装置以足够潮湿的状态（大于50％ RH）提供反应物（燃料或氧化剂）时。您需要选用较厚的膜（大于10um）。

性能参数如下所示：

预处理方案：

复合Pention膜以溴化物或氯化物形式运输。

1.当用于标准碱性燃料电池/电解池时，应通过用0.5-1.0 M NaOH或KOH溶液处理将膜转化为OH^-形式：将膜样品置于0.5–1.0 M NaOH或KOH的水溶液中，在20°C–30°C下放置24小时。用去离子水（pH≈7）冲洗后，膜即可使用。请使用密闭容器以避免CO₂污染（碳酸盐的形成可能会影响电导率）。氢氧根形式的膜必须在潮湿/加湿且不含CO₂的条件下保存，避免氢氧根形式的膜变干。在干燥条件下的长期储存应优选以碳酸盐，氯离子或溴离子形式进行。

2.当用于其他电化学（电渗析，脱盐，电渗析，反向电渗析，酸回收，盐分离等）和非电化学应用时，应将膜转换为与预期应用相关的阴离子形式。例如，如果应用程序要求将氯离子通过膜转移，则该阴离子交换膜需要转化为氯离子形式。为了将该膜转化为氯离子形式，需要将其浸入1-2 M NaCl或KCl盐溶液（溶于去离子水中）24-72小时，然后用去离子水冲洗以除去膜表面多余的盐。或者，如果预期的应用需要转移硫酸根阴离子，则该阴离子交换膜需要先预处理成硫酸根形式，在室温下将膜完全浸入盐溶液中24-72小时后，Na₂SO₄或K₂2SO₄的中性盐溶液通常足以使膜完全转化为硫酸盐形式。

如果您对存储，化学稳定性，预处理或在进行操作之前有任何疑问，请随时与我们联系以获取更多信息。

The Xion Pention-AEM-18 membrane is a composite AEM that uses the poly(norbornene) based resin and has an ion exchange capacity of 3.4 to 3.6 mequiv/g. Pention anion exchange membranes offer excellent mechanical strength and stability to a wide variety of chemistries. These particular AEMs depending on their thickness and crosslinking degree have demonstrated up to 9 A/cm2 current densities (or >3 W/cm2 power densities) in alkaline fuel cells with excellent durability and lifetime [based on the recent jointly conducted study between NREL, University of South Carolina, and Georgia Institute of Technology].

The stated electrochemical performance data is for reference only and depending on the MEA, CCM or GDE manufacturing method, used membrane thickness, testing hardware design and components used in the test hardware, and operational parameters (temperature, pressure, reactant flow rates, etc.), those values may or may not be attained.

SCI Materials Hub currently provides Composite Pention-18-5CL series anion exchange membrane sheets in 5, 10, 20, 30 and 50μm thicknesses and 5x5cm, 10x10cm, and 15x15cm sizes. Image on the bottom shows the chemical composition of the anion exchange resin used to manufacture Xion Composite Pention membranes.

The Xion Composite Pention-AEM-18 series can be used in fuel cells, electrolyzers, electrodialysis, redox flow batteries, electrochemical compressors, and a wide variety of other devices. Composite Pention AEMs are currently offered with 5% or 15% crosslinking levels.

XION Composite PENTION Membranes are ultra-thin, ultra-strong, and provide ultra-high performance while demonstrating highly stable performance as reinforced anion exchange membranes (AEM). The ionomer structure contains a poly(norbornene) backbone with quaternary ammonium functional groups. A reinforcement layer is integrated into the structure of the membrane to provide enhanced mechanical properties. The enhanced mechanical properties as free-standing membranes, providing higher ionic conductance without sacrificing strength.

-High anionic conductivity
-Great chemical stability at low and high temperatures
-Ultra-thin membranes with excellent mechanical strength

The membrane is delivered in dry form with the counter anion being either in bromide or chloride. Depending on application and cell design, assembling is possible in dry form (without pretreatment) or wet form.

For standard alkaline fuel cell / electrolysis applications, the membrane should be converted into OH-form by treating it with 0.5 – 1.0 M NaOH or KOH solution: Put the membrane sample in an aqueous solution of 0.5 – 1.0 M NaOH or KOH for at least 24 h at 20°C – 30°C. After rinsing with demineralised water (pH ~ 7) the membrane is ready to use. Use closed container to avoid CO2 contamination (carbonate formation that may affect conductivity). The membrane in OH-form must be stored under wet / humidified and CO2-free conditions, avoid drying out of the membrane in OH-form. Long-term storage in dry conditions should be preferably done in carbonate, Cl- or Br-form.

For electrochemical CO2 reduction applications, the anion exchange membrane should be converted to the carbonate or bicarbonate form by treating the membrane initially with 0.1 to 0.5 M KOH or NaOH solution and then with 0.1 to 0.5 M water soluble carbonate or bicarbonate salt solutions (such as potassium carbonate or potassium bicarbonate that is dissolved in de-ionized water or distilled water). Fully submerging the anion exchange membrane into KOH or NaOH solution for 6 to 12 hours and then to the desired carbonate or bicarbonate salt solution for a period of 48-72 hours would be sufficient to fully convert the membrane into either carbonate or bicarbonate form. After rinsing the membrane (which is in the carbonate form) with deionized water or distilled water, it can be assembled inside the electrochemical setup for electrochemical CO2 reduction experiments. While the submersion of the membrane into the KOH or NaOH can be skipped, for such situations, a longer submersion time may be required in order to fully convert the membrane to carbonate or bicarbonate form. Initial conversion to OH- form significantly improves the carbonate ion exchange process due to expanded pore sizes.

For other electrochemical (electrodialysis, desalination, electro-electrodialysis, reverse electrodialysis, acid recovery, salt splitting, etc.) and non-electrochemical applications, the membrane should be converted into the anionic form that is relevant for the intended application. For example, if the application is requiring the Cl- anions to be transferred through the membrane, then this anion exchange membrane needs to be converted into the Cl- form. In order to convert this membrane into Cl- form, it needs to be submerged into a 1-2 M salt solution of NaCl or KCl (dissolved in deionized water) for a period of 24-72 hours and then rinsed with deionized water to remove the excess salt from the membrane surface. Or if the intended application is requiring to transfer sulfate anions, then this anion exchange membrane needs to be converted into the sulfate form prior to its assembly into the cell. A neutral salt solution of Na2SO4 or K2SO4 would usually be sufficient to achieve the full conversion of membrane into the sulfate form after fully submerging the membrane into the salt solution for 24-72 hours at room temperature.

If you have any concerns about storage, chemical stability, pre-treatment or before proceeding, please feel free to contact us for further information.

1. 手机淘宝（官方淘宝店铺：科学材料站）

2. 点击进入淘宝网页链接

注：下单时请联系客服，注明选择哪个系列（72系列、35系列、18系列）和哪种交联度（5%CL、15%CL），其中20X20cm规格的目前只有Pention-72系列；50μm厚度的只有Pention-72/35/18-5CL，Pention-72-5CL-50μm没有20x20cm。

3. 其它联系方式

电话：+86 130-0303-8751/+86 156-0553-2352

微信：SCI-Materials-Hub

如需报价单请联系：Email: contact@scimaterials.cn

References citing our materials

二氧化碳还原

1. Strain Relaxation in Metal Alloy Catalysts Steers the Product Selectivity of Electrocatalytic CO2 Reduction

The bipolar membrane (Fumasep FBM) in this paper was purchased from SCI Materials Hub, which was used in rechargeable Zn-CO2 battery tests. The authors reported a strain relaxation strategy to determine lattice strains in bimetal MNi alloys (M = Pd, Ag, and Au) and realized an outstanding CO2-to-CO Faradaic efficiency of 96.6% with outstanding activity and durability toward a Zn-CO2 battery.

2. Boosting Electrochemical Carbon Dioxide Reduction on Atomically Dispersed Nickel Catalyst

In this paper, Vulcan XC-72R was purchased from SCI Materials Hub. Vulcan XC 72R carbon is the most common catalyst support used in the anode and cathode electrodes of Polymer Electrolyte Membrane Fuel Cells (PEMFC), Direct Methanol Fuel Cells (DMFC), Alkaline Fuel Cells (AFC), Microbial Fuel Cells (MFC), Phosphoric Acid Fuel Cells (PAFC), and many more!

3. Partially Nitrided Ni Nanoclusters Achieve Energy-Efficient Electrocatalytic CO2 Reduction to CO at Ultralow Overpotential

An AEM membrane (Sustainion X37-50 Grade RT, purchased from SCI Materials Hub) was activated in 1 M KOH for 24 h, washed with ultra-purity water prior to use.

电池

3. Blocking polysulfides with a Janus Fe3C/N-CNF@RGO electrode via physiochemical confinement and catalytic conversion for high-performance lithium–sulfur batteries

Graphene oxide (GO) in this paper was obtained from SCI Materials Hub. The authors introduced a Janus Fe3C/N-CNF@RGO electrode consisting of 1D Fe3C decorated N-doped carbon nanofibers (Fe3C/N-CNFs) side and 2D reduced graphene oxide (RGO) side as the free-standing carrier of Li2S6 catholyte to improve the overall electrochemical performance of Li-S batteries.

4. A high-voltage and stable zinc-air battery enabled by dual-hydrophobic-induced proton shuttle shielding

This paper used more than 10 kinds of materials from SCI Materials Hub and the authors gave detailed properity comparsion.

The commercial IEMs of Fumasep FAB-PK-130 and Nafion N117 were obtained from SCI Materials Hub.

Gas diffusion layers of GDL340 (CeTech) and SGL39BC (Sigracet) and Nafion dispersion (Nafion D520) were obtained from SCI Materials Hub.

Zn foil (100 mm thickness) and Zn powder were obtained from the SCI Materials Hub.

Commercial 20% Pt/C, 40% Pt/C and IrO2 catalysts were also obtained from SCI Materials Hub.