Advantages of AEM (Anion Exchange Membrane) over PEM (Cation Exchange Membrane)

AEM anion exchange membrane and PEM cation exchange membrane are two different types of membrane materials commonly used in electrochemical, energy storage, separation, and purification applications. They differ in the way ions are exchanged and the applicable scenarios.

1. Exchange ion type:

-Anion exchange membrane: It can selectively exchange anions and prevent the free transport of cations. It can adsorb anions from the solution and release other ions.

-Cation exchange membrane: It can selectively exchange cations and prevent the free transport of anions. It can adsorb cations from the solution and release other ions.

2. Usage scenario:

-Anion exchange membrane: commonly used in fields such as batteries, stacked membrane electrodes, and dye sensitized solar cells. They can transport anions in electrochemical reactions while preventing the passage of cations.

-Cation exchange membrane: commonly used in energy storage systems (such as fuel cells, electrolytic cells, etc.), as well as in liquid treatment and ion purification fields. They can transport cations in electrochemical reactions while preventing the passage of anions.

In addition to the above differences, there are also some differences in structure and performance between anion exchange membranes and cation exchange membranes. For example, their ion exchange capacity, conductivity, chemical stability, etc. may vary depending on the composition and preparation method of the material. Therefore, selecting appropriate membrane materials in specific applications is crucial to meet specific needs and requirements.

When it comes to anion exchange membranes and cation exchange membranes, there are some other differences worth noting:

1. Selectivity:

-Anion exchange membrane: It has the characteristic of high selectivity towards anions and can selectively prevent the passage of cations, while anions can pass through.

-Cation exchange membrane: It has the characteristic of high selectivity towards cations and can selectively prevent the passage of anions, while cations can pass through.

2. Permeability:

-Anion exchange membrane: During the ion exchange process, anions can penetrate through the membrane material, while cations are difficult or impossible to pass through.

-Cation exchange membrane: During the ion exchange process, cations can permeate through the membrane material, while anions are difficult or impossible to pass through.

3. Chemical resistance:

-Anion exchange membrane: usually able to resist acidic environments and extreme pH values well.

-Cation exchange membrane: usually able to resist alkaline environments and extreme pH values well.

Overall, there are differences in ion selectivity and transport properties between anion exchange membranes and cation exchange membranes. The specific choice of membrane material depends on the application requirements, including which ions need to be selectively transported and under what environmental conditions.

Advantages of AEM (Anion Exchange Membrane) over PEM (Cation Exchange Membrane)

More than 90% reduction in precious metal catalysts

Orion uses AEM (anion exchange membrane) to produce and store clean energy technology in alkaline environments, which is a long-term pursuit and game changing approach. Orion AEM has been proven to be the most durable membrane among over 50 tested by NREL, capable of withstanding 80 ° C KOH for 1000 hours with almost no degradation.

According to calculations, compared to PEM, AEM has a 33% cost reduction: precious metal catalysts have been reduced by 90%, and the required membrane thickness has been reduced by 50%. Alkali based hydroxide exchange technology instead of proton exchange eliminates the need for platinum catalysts and titanium shells, making AEM a more cost-effective clean energy method than PEM.

The use of AEM has a strong cost advantage over PEM, whether it is developing fuel cells, wind or solar power delivery standardization for zero emission fuel cell vehicles, or hydrogen power generation electrolysis tanks. Dual Orion AEM is the energy breakthrough needed for clean energy in the future.