Name: DuPont proton exchange membrane Nafion 117 isolation membrane
Brand: Canrud
Price: 99.67 USD

Question 1

Accepted Answer

Our R&D department did not perform any pretreatment when using it. But some instructors did treat it before use.

Question 2

Accepted Answer

Yes

Question 3

Accepted Answer

No, the filter membrane can only be wetted, it cannot become transparent.

Question 4

Accepted Answer

Electrolyte must be added, because this is not a pure solid electrolyte membrane; the intermediate base film is polyethylene (PE), which requires electrolyte to transport lithium ions.

Question 5

Accepted Answer

According to the analogy of the knowledge base, DuPont D520 5% Nafion solution can be stored at room temperature in theory, but it is recommended to avoid high temperature or extreme environmental conditions to ensure solution stability. If long-term storage is required, it is best to refer to the manufacturer's specific recommendations or conduct a small-scale stability test to confirm the preservation effect.

Question 6

Accepted Answer

It is recommended to use PTFE (polytetrafluoroethylene) as a positive electrode binder in magnesium coin cell systems, in particular for sulfur, organic or conversion type positive electrode materials. Because of its high chemical inertness, thermal stability and hydrophobicity, it can effectively reduce the side reaction with the magnesium metal anode, which is beneficial to improve the cycle stability of the battery.

Recommended models are:
-DuPont™Teflon®30B(60% aqueous dispersion)
-or equivalent performance of domestic PTFE emulsion (to ensure low impurities, high purity)

Note:
-PTFE is insoluble in organic solvents and cannot be coated as a solution like PVDF. A "wet film formation + stretching" process is required to prepare a self-supporting electrode;
-Avoid introducing metal ion contamination during operation;
-All assembly processes shall be carried out in an inert atmosphere glove box (H₂ O/O₂ < 0.1 ppm).

This recommendation is based on reasonable inferences made in the knowledge base about trends in "interference reduction" and the use of inert materials, combined with the high requirements for interface stability in magnesium batteries.

Question 7

Accepted Answer

In view of the problem that "the catalyst is easy to fall off and the use of Nafion affects the conductivity", Ketjen black EC-600JD is recommended. This model has an ultra-high specific surface area (about 1350 m²/g) and excellent conductivity, which can effectively build a three-dimensional conductive network and enhance the electronic conduction and mechanical binding force between catalyst particles while reducing the amount of Nafion. It is recommended to add 2-3%, and cooperate with high-speed shearing or ultrasonic dispersion process to obtain a uniform and stable electrode coating, thereby improving the electrochemical performance and cycle stability.

DuPont proton exchange membrane Nafion 117 isolation membrane

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