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可以使用非铂/低铂催化剂，在达到相同性能的前提下，可以大大地降低成本，阴离子交换膜的其他优点还有:耐碱、抗氧化、耐氯离子腐蚀、扩散透析以回收酸。

科学材料站可以提供XION AEM-Dappion不同厚度尺寸系列，其中厚度有5μm, 10μm, 20μm和30μm，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-Dappion复合阴离子交换膜是新推出的一款复合阴离子膜片（AEM），离聚体结构为包含有季胺官能团的狄尔斯-阿尔德聚合物（次苯基）主链（如下图所示），增强层位于膜的结构中，具有较高的离子导电性、良好的化学稳定性、超薄的厚度、良好的机械性能，主要用于燃料电池、电解槽、液流电池等领域。

相关参考文献：

1. Park,E.J.; Kim,Y.S.,Quaternized aryl ether-free polyaromatics for alkaline membrane fuel cells: synthesis,properties,and performance–a topical review. Journal of Materials Chemistry A 2018,6(32),15456-15477.

2. Park,E.J.;Maurya,S.;Hibbs,M.R.;Fujimoto,C.H.;Kreuer,K.-D.;Kim,Y.S.,Alkal-ine Stability of Quaternized Diels–Alder Polyphenylenes. Macromolecules 2019,52 (14),5419-5428.

3. Hibbs,M.R.,Alkaline stability of poly (phenylene)‐based anion exchange membranes with various cations.Journal of Polymer Science Part B:Polymer Physics 2013,51(24),1736-1742.

4. Small,L.J.;Pratt III,H.D.;Fujimoto,C.H.;Anderson,T.M.,Diels Alder polyphenylene anion exchange membrane for nonaqueous redox flow batteries. Journal of The Electrochemical Society 2015,163(1),A5106.

目前Xion-Dappion复合阴离子膜可生产的厚度有5um、10um、20um、30um，尺寸有5cmX5cm、10cmX10cm、15cmX15cm。

The Xion AEM-Dappion membrane is a composite anion exchange membrane (AEM) that uses the Dappion Gen1 resin (3-D polyphenylene) as the polymer backbone with a benzyl trimethyl ammonium side chain as its functional group and has an ion exchange capacity of 2.1 - 2.5 mequiv/g. Dappion Gen1 membranes offer excellent mechanical strength and stability to a wide variety of chemistries.

SCI Materials Hub currently provides Dappion Gen1 anion exchange membrane sheets in 5, 10, 20, and 30μm thicknesses and 5x5cm, 10x10cm and 15x15cm sizes. Image on the right side shows the chemical composition of the anion exchange resin used to manufacture Xion Composite Dappion Gen1 membranes.

The Xion AEM-Dappion-5μm is a 5 micrometers thick anion exchange membrane and it can be used in fuel cells, electrolyzers, electrodialysis, redox flow batteries, electrochemical compressors, and a wide variety of other devices.

XION Composite Dappion Gen1 AEMs are ultra-thin, ultra-strong, provide ultra-high performance for various alkaline chemistry based applications. The ionomer structure contains a 3-D polyphenylene backbone with a benzyl trimethyl ammonium side chain for its functional groups. A reinforcement layer is integrated into the structure of the membrane to provide enhanced mechanical properties and this is composed of microporous ePTFE (also known as expanded PTFE). 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 article by Hibbs et al. entitled "Synthesis and Characterization of Poly(Phenylene)-Based Anion Exchange Membranes for Alkaline Fuel Cells" is an excellent article that details out the advantage of 3-D poly(phenylene) based backbones and their suitability for alkaline fuel cell and other applications including various synthesis pathways for manufacturing different compositions.

Thearticle by Kim et al. entitled "Resonance Stabilized Perfluorinated Ionomers for Alkaline Membrane Fuel Cells" is an excellent article that details out the advantage of 3-D poly(phenylene) based backbones and their suitability for alkaline fuel cell and other applications including actual alkaline fuel cell performance at a temperature of 80 °C with H2/O2 reactants.

The article by Choe et al. entitled "Alkaline Stability of Benzyl Trimethyl Ammonium Functionalized Polyaromatics: A Computational and Experimental Study" is an excellent article that investigates the stability of benzyl trimethyl ammonium as the functional group with 3-D poly(phenylene) based backbone both theoretically and experimentally and then suitability of such anion exchange membranes for alkaline electrochemical devices.

The article by Michael Hibbs entitled "Alkaline Stability of Poly(phenylene)-Based Anion Exchange Membranes with Various Cations" is an excellent article that investigates the stability of benzyl trimethyl ammonium and several other functional groups as the ion conducting entities with 3-D poly(phenylene) based backbone and demosntrates the advantages of the 3-D poly(phenylene) with benzyl trimethyl ammonium compared to other cationic groups.

A typical lead time of 2-3 weeks is to be expected.

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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.