Precious Metal Plating Electrodes (PEM Water Electrolysis GDL / Insoluble Electrodes)

PEM Water Electrolysis Electrodes (Power feeder / GDL / PTL)

TANAKA’s PEM Water Electrolysis Electrodes (Power Feeder, GDL, PTL)

• It is possible to choose substrates according to a balance of cost and performance (electrical conductivity, durability, and gas diffusion).
• We have a track record of platinum plating on different types of substrates, including expanded, micromesh, and porous (sintered fiber body and sintered powder body).

【Titanium Expanded】
Features

• This is a relatively affordable substrate as it is widely distributed in the market. (Minimum opening 2.0 mm × 1.0 mm)

【Titanium Micromesh】
Features

• As the substrate surface is flat and smooth, it can be expected to mitigate physical damage when bonding with CCM.
• It is possible to create original designs for the opening size and arrangement.

【Titanium Porous (Sintered Fiber Body, Sintered Powder Body)】
Features

• Using complex porous structures, gas supply homogeneity and such can be expected.

Insoluble Electrodes

Insoluble Electrodes by TANAKA

• We offer various types of precious metal plating, including platinum plating, platinum/iridium alloy plating, and gold plating, as well as iridium oxide coating.
• Substrates can be processed into various shapes, including plate, rod, and terminal.
• We offer the most suitable insoluble electrodes according to size, shape, and application.

<Example of Shape Processing>

Terminal Processing

＜Example of membrane thickness＞

Various Insoluble Electrode Applications
【Alkaline Ion Water Purifier】【Electrolyzed Hydrogen Water】
Features

• Through our unique processing technology, uniform platinum plating is possible even on thin membranes (Micro Plate).
• It has high durability in regard to the switching of polarity needed to prevent scaling of electrodes.
• It can be expected to have a longer life compared to generic coated sintered electrodes (according to in-house comparison).
• Large-volume mass production at low cost is possible using our automated mass production line.

	SEM ×1000	SEM-EDX Pt mapping
Micro Plate
Conventional plating

【Hypochlorous Acid Water】【Acidic Water】【Alkaline Cleaning water】
Features

• We have a lineup of electrode catalysts, including platinum plating, platinum-iridium alloy plating, and iridium oxide. It is possible to choose electrodes according to the application from characteristics such as chlorine generation efficiency and polarity switching.

Product Lineup

Schematic of catalyst layer structure

【Surface Treatment Anode】
Features

• Using a large plating tank, it is possible to carry out platinum plating of titanium substrates up to 1.8m × 1.2m.
• It is possible to reuse titanium substrates for recoating.
  ※Platinum remaining on used electrodes may be purchased as valuable depending on the circumstances.

Other plating technologies

【Plating on Minute Substrates】
Features

• Plating is possible even on miniature substrates such as spheres with a diameter of 3 mm.
  It is also possible to carry out barrel plating according to the size and shape.

【Precious Metal Plating on Polymer Membrane】
Features

• It is possible to carry out platinum plating (electroless plating) of polymer membranes.
• Applications are expected in the fields of electrolytic processing of water and water electrolysis

Plating on Polymer Membrane

【Platinum Mesh】
Features

• Using electroforming technology, we can manufacture meshes with a platinum purity of 99.90% or higher with holes ranging from Φ3 to 4 µm.
• Nickel-free and complies with the EU's Directive on the Restriction of the Use of Nickel (RoHS compliant).
• Has a track record of use in medical nebulizers.

Related Information

Product Solutions ＞ Role of Precious Metals in Contributing to Carbon Neutrality

Products/Services ＞ Electrocatalysts for Fuel Cells and Water Electrolysis (PEM Type)