Titanium Fiber Felt
The Saifilter Titanium fiber felt emerges from an exclusive fabrication technique proprietary to the corporation, entailing the micrometer-scale segmentation of elongated titanium fiber. These filaments are subsequently arrayed in a non-woven manner and coalesced under elevated temperatures within a vacuum milieu. It boasts a tri-dimensional, lattice-like porous architecture, endowed with an exceedingly vast specific surface expanse and a remarkably consistent contact zone.
This renders it eminently apt for PEM Pure Water Electrolyzers and the PEMFC fuel cell sector, which necessitate irregular porous titanium fiber felt. It stands as a quintessential selection for porous diffusion layers. Procurable in both mono-layer and multiple-layer variants, it may additionally undergo augmentation with gold or platinum.
Specifications of Titanium Fiber Felt
| Raw Material | Pure titanium |
|---|---|
| Purity | ＞99.9% |
| Available fiber diameter | 10～150μm (effective diameter, cross-section recalculated to circle) |
| Porosity approximately | 25-90% |
| Weight | 300 ～ +/- 4,000 g/m² |
| Thickness | 0.25mm, 0.40mm, 0.60mm, 0.80mm, 1.0mm, 1.2mm-5.0mm |
| Dimensions | 40*40mm, 50*50mm, 100*100mm, 200*200mm, 300*300mm, 1200*1200mm |
| Shape | Custom (polygon, round, ring, disc, etc.) |
| Appearance | Silver grey titanium felt paper |
| Saifilter can provide free samples for you to test and inspect. This product is usually available as in-stock item, otherwise the lead times would be around 2 weeks. | |
Under intense illumination, the pores on the surface of titanium fiber felt become clearly visible.
The current density of different porous transport layers
Platinized Titanium Fiber Felt
The Saifilter platinized titanium fiber felt is ingeniously crafted to counteract the predicament of a swiftly emerging electrical insulating oxide sheath (TiO2) under the rigorous conditions of high-pressure PEM electrolyzers (spanning from 1 bar to 3 bar).
This oxide veneer serves as an electrical non-conductor, hence potentially escalating the interface resistance within the accumulator, diminishing electrochemical efficacy, and impinging upon the functionality of the entire electrochemical apparatus.
Through the application of a platinized layer embellishment atop the titanium felt's surface, the objective is to preserve the substrate's innate electrical conductance, efficaciously forestalling the genesis of TiO2.
The anticipated platinum metal burden on this platinized titanium fiber felt is quantified at approximately 60-80 micrograms per square centimeter, contingent upon the physical proportions of the substrate. This homogenous overlay guarantees an extended operational lifespan and chemical steadfastness in high-pressure electrolyzers (reaching up to 100 psi).
Platinized Titanium Fiber Fel
Titanium Fiber
Specifications of Platinized Titanium Fiber Felt
| Raw Material | Pure titanium |
|---|---|
| Purity | ＞99.9% |
| Available fiber diameter | 10～150μm (effective diameter, cross-section recalculated to circle) |
| Porosity approximately | 25-90% |
| Weight | 350 ～ +/- 4,500 g/m² |
| Thickness | 0.25mm, 0.40mm, 0.60mm, 0.80mm, 1.0mm, 1.2mm-5.0mm |
| Dimensions | 40*40mm, 50*50mm, 100*100mm, 200*200mm, 300*300mm, 1200*1200mm |
| Shape | Custom (polygon, round, ring, disc, etc.) |
| Appearance | Yellowish metallic titanium felt paper |
| SAIFILTER can provide free samples for you to test and inspect. | |
| This product is usually available as in-stock item, otherwise the lead times would be around 2 weeks. | |
Customized Platinized Titanium Fiber Felt
Customized Platinized Titanium Felt Paper
Titanium Fiber Felt for PEM Pure Water Electrolyzer
Within the realm of PEM (Proton Exchange Membrane) aqueous electrolyzers, the electrode substance, namely titanium fiber felt diffusion stratum (Gas Diffusion Layer, GDL), holds a pivotal position in sculpting both the efficacy and longevity of the system. The conglomeration known as the membrane electrode assembly, which encompasses the diffusion stratum (Gas Diffusion Layer, GDL), catalyst stratum (CCM), and proton exchange membrane, stands as the quintessential locus for the electrochemical transmutation within the stack, asserting itself as the crux of PEMWE. This assembly undertakes numerous indispensable roles.
- Catalyst Stratum: Positioned at the very core of the membrane electrode, this layer, adorning the proton exchange membrane, is imbued with catalysts that catalyze the electrochemical transfiguration for hydrogen genesis from H2O. It emerges as the critical juncture for the interplay between hydrogen and oxygen gases.
- Diffusion Stratum: Its contribution to the membrane electrode assembly is multifaceted. Primarily, it furnishes structural fortitude, bolstering the stability of the catalyst stratum. In the second place, it assures the homogenous dispersion of the reactant water to obviate any disparities in water distribution. Furthermore, this layer adeptly expels the synthesized high-purity gases, thereby preserving the unbroken continuity of the reaction. Of paramount importance, the conductivity of the diffusion stratum facilitates the transmission of current, a cornerstone for the unimpeded function of PEM.
- Proton Exchange Membrane: This element functions as a mediator between the catalyst and diffusion strata, tasked with the conveyance of protons from the anode to the cathode. It not only acts as a conduit for ion transfer but also as a bulwark against the amalgamation of hydrogen and oxygen gases, safeguarding the selectivity of the reaction.
The delineated process of electrochemical water splitting underpins the proficient operation of PEM pure water electrolyzer hydrogen production apparatuses. The titanium felt diffusion layer’s roles in providing structural support, managing water distribution, facilitating gas emission, and conducting current are indispensable for the seamless advancement of the water electrolysis reaction.
Titanium Felt for Proton Exchange Membrane Fuel Cell (PEMFC)
Proton Exchange Membrane Fuel Cells (PEMFC) are a type of fuel cell that utilizes a Polymer Electrolyte Membrane (PEM) as the electrolyte. Their principle is the opposite of that involved in the power-consuming proton exchange membrane electrolysis. Within this chemical reaction system, Titanium felt is placed in the gas diffusion layer, playing a critical role in gas conduction, water management, electron conduction, and structural support.
The primary material typically used for the gas diffusion layer is titanium fiber felt. Titanium fiber boasts excellent corrosion resistance, high electrical conductivity, good thermal conductivity, and lower production costs. Therefore, this medium is preferentially chosen for use as the GDL.
1. Air guide and drainage function：
The Gas Diffusion Layer (GDL) is a critical component within the membrane electrode assembly of Proton Exchange Membrane Fuel Cells (PEMFCs), effectively transporting hydrogen and oxygen from the bipolar plates to the catalyst layer to meet the reaction needs of the catalyst layer.
It also facilitates the removal of water produced in the catalyst layer, preventing the accumulation of water that could hinder the reaction process. The porous titanium felt, chosen for its excellent breathability and water drainage capabilities, serves as an ideal material for this purpose.
2. Conductive support function：
The use of titanium felt paper in the diffusion layer also serves the function of providing conductive structural support. Its superior electrical conductivity ensures that electrons generated from the catalyst layer can efficiently pass through the diffusion layer to the bipolar plates, thereby forming a closed circuit and facilitating the generation of electrical energy.
Within the membrane electrode assembly, the thickness of the diffusion layer typically exceeds 120 μm, providing the necessary mechanical support for the PEMFC and enhancing the overall structural strength.
Saifilter Titanium Felt Features
- Minimal ohmic resistance.
- Capable of withstanding certain pressures.
- Strong resistance to acid corrosion.
- Good electrical and thermal conductivity.
- Longer service life and lower titanium felt price.
How to Identify the Quality of Titanium felt
- Visual Inspection: Examine the external surface of the titanium fiber felt. If the fiber length is shorter than 60mm, it is likely a lower-quality product. Such inferior products often exhibit higher electrical resistance, shorter lifespan, and lower pressure tolerance. Over time, they may experience fiber loosening, leading to a rapid increase in voltage.
- Water Droplet Test: Drop a few water droplets onto the surface of the titanium fiber felt and observe whether the water quickly disappears and permeates to the other side. Rapid disappearance and permeation indicate a high-quality product with good breathability and water permeability. Conversely, if the water droplets do not disappear or permeate, it may be an inferior product. Such low-quality products may cause poor water supply to the membrane electrode, resulting in high voltage and overheating, ultimately damaging the membrane electrode.
- Resistance Test: Compare the voltage of electrolysis cells equipped with membranes of different qualities under the same conditions. If the voltage is higher, it is likely an inferior product, characterized by lower hydrogen production and a shorter lifespan.
These methods serve as preliminary quality assessments when using titanium fiber felt, aiding in the selection of high-quality materials to ensure the stability and longevity of fuel cell systems.
A Demister Filter, a mist eliminator or droplet separator, is used in process industries to remove liquid droplets from gas or vapor streams. These filters are typically made from a mesh or pad of knitted wire or plastic material.
Demister Filters work by intercepting the path of droplets in a vapor stream. As the vapor passes through the mesh or pad, the inertia of the droplets causes them to collide with the wire or fibers, merge, and form larger droplets. These larger droplets are heavy enough to fall from the vapor stream due to gravity.
Benefits include improved product purity, protection of downstream equipment from corrosion and fouling, reduced product loss, and enhanced environmental compliance by minimizing liquid droplet emissions.
Benefits include improved product purity, protection of downstream equipment from corrosion and fouling, reduced product loss, and enhanced environmental compliance by minimizing liquid droplet emissions.
Demister Filters are widely used in industries such as chemical processing, petrochemicals, oil and gas, power generation, and in any application where the separation of liquid droplets from vapor streams is required.
