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Technical Information

Applications and Characteristics

Function Applications Material
Catalyst carrier
  • Photocatalyst carrier
  • Oxidation catalyst carrier
 Ni, Ni-Cr,
Ni-Sn
Filtering
  • Various filters
 Ni, Ni-Cr,
Ni-Sn
High conductivity
  • Current collector for battery
  • Ni-MH battery (Ni)
  • Fuel cell (Ni, Ni-Cr, Ni-Sn)
  • Next generation battery (Al*, Cu*)
 Ni, Ni-Cr,
Ni-Sn
Electromagnetic shielding
  • Electromagnetic wave shielding materials
 Ni

※You can check this table by side scrolling.

Application

1Catalyst Carrier

Celmet™ has been adopted as industrial deodorizing catalyst.

Industrial Deodorizing Catalyst

Comparison of catalyst carrier

Ceramics Porous alumina Celmet™
Appearance
Pressure loss ◎small △large ○middle
Amount of catalyst carrier △small ◎large ○middle
Mechanical strength △weak ○middle ◎strong

Catalyst carrier

Merit

Advantages of applying Celmet™

Improve performance
  • Compared to ceramics, the amount of catalyst carrier is increased due to its large surface area.
Low pressure loss
  • Compared to porous alumina, Celmet™ demonstrates a better balance between low pressure loss and high catalyst carrier.
Durability and strength
  • Compared to ceramic filter, Celmet™ is durable and can be used repeatedly.

2Photocatalyst Carrier

Celmet™ can work as air cleaner filter.

High filter performance of 80% or more

Photocatalytic filter performance

Quickly respond to ON/OFF light irradiation

Measured under collaborative research with Kanagawa Institute of industrial Science and Technology (JIS R 1701-2:2016 Fine Ceramics - evaluation for air purification performance of photocatalytic materials, Part 2: photocatalytic performance evaluation based on removal performance of acetaldehyde)

Ni Celmet™
(Nothing)

Photocatalyst Ni Celmet™
(TiO2 coat)

Merit

Advantages of applying Celmet™

Performance improvement
  • Removal rate of toxic substance is improved due to its large surface area of Celmet™
  • Quickly respond to light irradiation
Durability and strength
  • Celmet™ as a metal has impact resistance and durability

3Heat Applications

Celmet™ has been considered as naturally air-cooled heat sink for automotive.

Naturally air-cooled heat sink

Naturally air-cooled heat sink
Principle

Cooling by heat conduction to the air

Advantages
  • Large surface area improves heat transfer efficiency
Applications

Electronics

Heat storage sheet

Heat storage sheet
Principle

Cooling by phase-change latent heat of heat-storage material

Advantages
  • Thickened heat storage sheet (improvement of storage material heat retention)
  • Improved input and output speed of heat to heat-storage material。
Applications

Building materials, electronics

Merit

Advantages of applying Celmet™

High performance
  • Miniaturization by improved cooling performance
Materials
  • Ni
Application
  • Naturally air-cooled heat sink
  • Heat storage sheet (filling the heat-storage material)
  • ebullient cooling (the starting point of boiling)
  • electrical heating (Ni-Cr)

Heat source

Heat source
Principle

Cooling by the latent heat of vaporization of refrigerant

Advantages
  • Large specific surface area increases the starting point of boiling (improvement of cooling performance)
Applications

Server, supercomputer

4Grease Filter

Celmet™ has been adopted in restaurants and commercial facilities.

Grease Filter Performance

Merit

Advantages of applying Celmet™

Collection performance
  • Compared to baffle filter, Celmet™ has higher collection performance due to its large surface area.
Recyclability
  • The material (nickel) can be repeatedly used by alkaline washing.
Strength and safety
  • Compared to metal fiber or ceramic, Celmet™ has less chipping and mechanical degradation, improving safety.
  • Compared to stainless steel baffle filter, Celmet™ has better fireproof performance due to lower thermal conductivity.
Weight saving
  • The weight is one-third of baffle filter.

5Electrodes of Alkali Water Electrolysis

Celmet™ has been considered as industrial hydrogen generator.

Alkali Water Electrolysis

Current-voltage characteristics of
hydrogen generation electrode

Alkali Water Electrolysis

Celmet™ increases the amount of hydrogen generation

Merit

Advantages of applying Celmet™

Voltage reduction of alkaline water electrode cell
  • Celmet™ is porous metal so that a zero-gap structure is possible and can reduce resistance of solution.
Improvement of hydrogen generation efficiency
  • Compared to lath or mesh, applying Celmet™ to hydrogen electrode can increase the amount of hydrogen without increasing the cell voltage due to its large surface area.

6Fuel Cells (SOFC)

Celmet™ has been adopted as current collector and
gas flow path of industrial and institutional fuel cells.

Proposal

Fuel Cells (SOFC)

SOFC Performance of Various Anode Materials

Ni felt Ni mesh Ni Celmet™
Appearance
High fuel utilization ○ high × low ○ high
Pressure loss × big △ middle ○ small
Cell fracture ○ few × many ○ few
Merit

Advantages of applying Celmet™

low cost stack
  • No need for complex gas flow.
compact stack
  • Celmet™ can make interconnector thinner so that Celmet™ functions as gas flow path and gas diffusion.
reduction of pressure loss
  • High porosity can reduce pressure loss.
Improvement of the fuel availability
  • Celmet™ can improve the fuel availability because fuel gas flows uniformly.
Improvement of current collection performance of air electrode
  • Ni alloy Celmet™　can be applied as air electrode, because it has good oxidation resistance.

7Fuel Cells (PEFC)

Celmet™ has been adopted as current collector
and gas flow path of fuel cells for lift trucks.

Proposal

Fuel Cells (PEFC)

Energy Output Characteristics*

* TABE, NASU, MORIOKA and CHIKAHISA, 2012,
Analysis of Performance Characteristics and Internal Phenomena of PEFC with Porous Flow Field,Transactions of the Japan Society of Mechanical Engineers, Vol.78, No789, 204-212.

Merit

Advantages of applying Celmet™

Low cost
  • No need for GDL and separators with complex gas flow path, and lower pressure loss.
Compact
  • Celmet™ functions as gas flow path, gas diffusion and current collector.
Performance improvement
  • Lower resistance and high-strength compared to carbon paper.
Higher energy output
  • Higher current collection performance and improved flooding resistance – drainage is improved by capillary of Celmet™.

SEI TECHNICAL REVIEW

Properties

Tensile Strength (Nickel Celmet™)

Tensile Strength (Nickel Celmet™)

Tensile strength is proportional to the nickel density regardless of cell size.

Pressure Drop (Nickel Celmet™)

Pressure Drop (Nickel Celmet™)

By choosing part number and thickness, you can optimize the pressure loss.

Heat Resistance (Oxidization)

Heat Resistance (Oxidization)

Operating temperature limit:
Ni: 450-500 deg., Ni-Cr: 650-700 deg.

Relationship between Porosity and Compression Rate

Relationship between Porosity and Compression Rate

Even when pressed down to half the thickness, the porosity is kept at 90%.

Dust collection Property

Dust collection Property

Grade#8-1.4mmt (pore size about 230µm) can trap 5µm particles at 50% rate.

Sound Absorption (back air layer 300mm)

Sound Absorption (back air layer 300mm)

In the region of 3,000~5,000Hz, Celmet™　has good sound-absorbing properties.