AnioMer TC-MS20 is a mechanically reinforced anion exchange membrane designed for alkaline electrochemical applications, including water electrolysis.

It combines SDB’s proprietary polycarbazole-based anion exchange polymer with a porous reinforcing support to deliver high hydroxide ion conductivity, enhanced mechanical strength, and improved dimensional stability during operation.

Key Features

Mechanically reinforced composite membrane
High hydroxide ion conductivity
Good dimensional stability under alkaline conditions
Reduced swelling behavior
20 µm nominal thickness for compact cell designs

User Instructions & Pretreatment

Product State: Delivered dry, attached to a release film. Peel and remove the release film before use.

Initial Form: Supplied in the Br⁻ (bromide) counter-ion form.

Activation Protocol:

System Circulation: Circulate KOH solution for at least 1 hour before applying voltage or current.
CCS Testing: Soak the membrane in 1 M KOH for 1 hour prior to use.

Important: Keep the KOH solution strictly isolated from ambient CO₂ during activation to prevent carbonation and loss of ionic conductivity.

IV curve (1M KOH, 60°C)	EIS (40 mA/cm², 1 M KOH, 60°C)
AnioMer Membrane (Roll)	Cross Section of AnioMer Membrane

Dispersion/Solution/Powder Specifications
X-Ionic Conductivity	> 33 mS/cm (60 °C, 1 M KOH, HFR @ 0.04 A/cm²)
Membrane Properties
Swelling Ratio	MD 1% / TD 3% / z-axis 22% (80 °C DI water, 10 h)
Ionic Form and Type	Br⁻ (Bromide) Mechanically reinforced composite AEM (polycarbazole-based)
Thickness	24 ± 10% µm (Dry)
Tensile Strength - max. (MPa)	MD 40 MPa / TD 29 MPa (ASTM D882)