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Sigracet 39 BC

  • 产品代码:213903
  • 产品描述:Sigracet 39 BC
  • 品牌:SGL Sigracet
  • 货期:现货
  • 浏览次数:
  • 咨询电话:+86 130-0303-8751
  • 关键词:Sigracet 39 BC, 科学材料站, SCI Materials Hub
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1. 简介

Sigracet 39BC is a non-woven carbon paper gas diffusion media with a Microporous Layer (MPL) that has been PTFE treated to 5%. It has a total thickness of 325 um (microns). SGL 39 BC is a great low-cost alternative to conventional woven carbon paper Gas Diffusion Layer (GDL) materials.


2. 特性

The Sigracet Carbon Fiber Paper 39 Series is intended to combine the required production robustness and the excellent performance properties.

Stack developers and assemblers are benefiting from the following greatly improved characteristics:

- Greatly improved homogeneity inter-lot and intra-lot.

- The overall variability has been shown to be better than +/- 10% (2 sigma)

- Greatly improved surface flatness

- Greatly reduced occurrence of faulty spots on a roll

- Best performance under various operating conditions


3. 引用

欢迎在文章中引用我们的材料

1. Gas diffusion layer Sigracet 39BC was obtained from SCI Materials Hub.

资料下载:

Sigracet 20 and 30 Series Carbon Paper Property Sheet.pdf

Sigracet 28 BC Carbon Paper Property Sheet.pdf

Sigracet AB, BA, BC+ Series GDL MSDS.pdf

Sigracet Carbon Fiber GDL White Paper.pdf

Sigracet GDL Handling Instructions.pdf

Sigracet GDS 2D Recommended Applications.pdf


Gas Diffusion Layer Properties
Material TypeCarbon Fiber Paper
Thickness325 microns +/- 25 microns
Basic Weight (g/m2)105 +/- 10
Air Permeability (s)1.50 +/- 1.00 cm3/(cm2*s)
Porosity (%)80%
Compressibilityca. 21% (at 1 MPa)
Electrical Resistivity (through plane)< 12 mΩcm2 (milliohms cm2)
IP Pressure Drop0.4 bar (at 1 MPa)
Ash Content< 0.25%
PTFE Treatment5%
Microporous LayerYes, on one side


SGL Carbon develops and commercializes carbon-based products for Polymer-Electrolyte-Membrane Fuel Cells (PEFC):

- Gas Diffusion Layers (GDL)

- Foils used as separator plates for fuel cells and redox-flow batteries (Expanded Graphite)


GDLs are typically designed as a bilayer structure consisting of a macro-porous backing material (carbon fiber paper support) and a micro-porous, carbon-based layer (MPL). The fibrous backing material governs the mechanical properties of the GDL (behavior upon compression, bending and shear strength, etc.) while the MPL ensures intimate contact to the catalyst layers, protects the delicate proton exchange membrane against perforation and plays an active role with respect to the water management in the cell during operation. There is consensus that this heterogeneous porosity brought about by this structure (hydrophilic/hydrophobic and various pore sizes) is advantageous for the performance.

Structure of SGL Carbon gas diffusion layer

Sketch of the bilayer structure of Gas Diffusion Layers


Hydrophobic properties in the backing and the MPL are maintained by adding defined amounts of polytetrafluoroethylene (PTFE) to both sublayers. Various types of carbon particles (carbon blacks, graphite) can be used in the MPL in order to produce different levels of hydrophobicity. Furthermore, the MPL can be used as substrate to deposit catalyst particles for the manufacture of gas diffusion electrodes (GDEs).

SGL Carbon has been producing fully-treated SIGRACET gas diffusion layers by reel-to-reel processes since 1999. Carbon paper-type (prepared by wet-laying of chopped PAN-based carbon fibers) gas diffusion layers are the preferred solution since they can be manufactured at high volumes (scalability) and low thickness. The following figures show the whole value chain of GDL manufacturing. All commercially available GDL materials to date are based on carbon fibers derived from polyacrylonitrile (PAN). PAN (co)polymers are processed into precursor fibers by wet-spinning. Subsequent stabilization and pyrolysis yields high tensile (HT) carbon fibers which are sized and chopped to enable suitable processing by means of papermaking technologies.


Carbon Fiber Production

SGL Carbon's carbon fiber production process

Manufacturing of SIGRAFIL chopped carbon fibers


A primary carbon fiber web is laid by a papermaking technology and subsequent thermobonding. Thereafter, the obtained raw paper is impregnated with carbonisable thermoset resins (with optional addition of carbon fillers), cured and re-carbonized/graphitized. This serves to enhance the mechanical stability and conductivity as well as to adjust the desired porosity level.


Carbon Paper Substrate

Carbon fiber substratum SGL Carbon

Manufacturing route of SIGRACET (carbon paper-based) gas diffusion layer backings


Finishing of GDL comprises hydrophobic treatment of the substrate with PTFE and coating with a microporous layer (MPL).


Finishing Treatment

Finishing treatment of SGL Carbon's carbon fiber paper for fuel cell applications

Finishing treatments of SIGRACET (carbon paper-based) gas diffusion layers


A loading of the substrate with 5% (w/w) PTFE has proven to be sufficient for obtaining a pronounced hydrophobicity. MPLs typically contain 20 to 25% PTFE. This MPL composition has been identified as the optimum ratio for PEMFC performance across a broad range of operating conditions. Mean pore diameters of SIGRACET GDLs are typically in a range from 0.1 to 0.3 μm (Hg-Porosimetry) or 1.5 to 3 μm (calculated from capillary flow porometry). The hydrophobic treatment produces water repellent properties for the substrate and for the MPL (water contact angles by sessile drop method > 130°).

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2. 点击进入淘宝网页链接

Sigracet 39 BC

产品代码

产品描述

产品价格及规格货期
213903

Sigracet 39 BC

¥299 (5cm*5cm,货号:213903-0505)

¥598 (5cm*10cm,货号:213903-0510)

¥1196 (5cm*20cm,货号:213903-0520)

现货
SCI Materials Hub is Committed to Offering The Best Price & Customer Servics!

*大量需求请联系我们咨询更多折扣

**可提供13%增值税专用发票


3. 其它联系方式

电话:+86 130-0303-8751/+86 156-0553-2352

微信:SCI-Materials-Hub

如需报价单请联系:Email: contact@scimaterials.cn



References citing our materials

二氧化碳还原

1. Strain Relaxation in Metal Alloy Catalysts Steers the Product Selectivity of Electrocatalytic CO2 Reduction

The bipolar membrane (Fumasep FBM) in this paper was purchased from SCI Materials Hub, which was used in rechargeable Zn-CO2 battery tests. The authors reported a strain relaxation strategy to determine lattice strains in bimetal MNi alloys (M = Pd, Ag, and Au) and realized an outstanding CO2-to-CO Faradaic efficiency of 96.6% with outstanding activity and durability toward a Zn-CO2 battery.


2. Boosting Electrochemical Carbon Dioxide Reduction on Atomically Dispersed Nickel Catalyst

In this paper, Vulcan XC-72R was purchased from SCI Materials Hub. Vulcan XC 72R carbon is the most common catalyst support used in the anode and cathode electrodes of Polymer Electrolyte Membrane Fuel Cells (PEMFC), Direct Methanol Fuel Cells (DMFC), Alkaline Fuel Cells (AFC), Microbial Fuel Cells (MFC), Phosphoric Acid Fuel Cells (PAFC), and many more!


3. Partially Nitrided Ni Nanoclusters Achieve Energy-Efficient Electrocatalytic CO2 Reduction to CO at Ultralow Overpotential

An AEM membrane (Sustainion X37-50 Grade RT, purchased from SCI Materials Hub) was activated in 1 M KOH for 24 h, washed with ultra-purity water prior to use.


电池

3. Blocking polysulfides with a Janus Fe3C/N-CNF@RGO electrode via physiochemical confinement and catalytic conversion for high-performance lithium–sulfur batteries

Graphene oxide (GO) in this paper was obtained from SCI Materials Hub. The authors introduced a Janus Fe3C/N-CNF@RGO electrode consisting of 1D Fe3C decorated N-doped carbon nanofibers (Fe3C/N-CNFs) side and 2D reduced graphene oxide (RGO) side as the free-standing carrier of Li2S6 catholyte to improve the overall electrochemical performance of Li-S batteries.


4. A high-voltage and stable zinc-air battery enabled by dual-hydrophobic-induced proton shuttle shielding

This paper used more than 10 kinds of materials from SCI Materials Hub and the authors gave detailed properity comparsion.

The commercial IEMs of Fumasep FAB-PK-130 and Nafion N117 were obtained from SCI Materials Hub.

Gas diffusion layers of GDL340 (CeTech) and SGL39BC (Sigracet) and Nafion dispersion (Nafion D520) were obtained from SCI Materials Hub.

Zn foil (100 mm thickness) and Zn powder were obtained from the SCI Materials Hub.

Commercial 20% Pt/C, 40% Pt/C and IrO2 catalysts were also obtained from SCI Materials Hub.

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