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Carbon Nanofoam

Carbon Nanofoam MSDS

Electrically conductive carbon nanofoams are a new material with many of the properties of traditional Aerogel material. These materials are available in the form of monoliths, granules, powders and papers. They are synthetic, lightweight foams in which the solid matrix and pore spaces have nanometer-scale dimensions. Prepared by sol-gel methods, nanofoams typically have low density, continuous porosity, high surface area, and fine cell/pore sizes. The foams are also electrically conductive and have a high capacitance.

Standard densities of carbon nanofoams range from 0.25 to 1.00 g/cm3. Carbon nanofoams precursors can be infiltrated into a carbon fiber mat that, when carbonized, will result in paper-like electrode material 0.007 to 0.050" thick.

Morphology examination by scanning electron microscope shows an open cell structure and continuous porosity. The particle size and pore spacing is a function of density and the polymerization chemistry used during the sol-gel process.

Low density carbon nanofoams (~0.25 g/cm3) have the largest cell/pore size with particle diameters of up to 100 nm and pores at least 500 nm. High density carbon foams (abt. 0.8 g/cm3) have ultra fine particles and pores of less than 1000Å.

Properties of Nanocellular Carbon Foam


Properties of Carbon Nanofoam

Available Ranges  
  Density 0.25 - 1.0 g/cm3  
  Surface Area, BET 400 m2/g*  
  Avearge Pore Size 0.7 nm*  
  Electrical Resistivity 0.010 - 0.040 ohm-cm  
  Capacitance 30 F/g*  
  Thermal Conductivity
0.089 W/m°K**
  Gas Permeability 1.47 x 10-10**  
  Color Black  
  * at Density of 0.8 g/cm3    
  * at Density of 0.26 g/cm3    
  * Measured at room temperature in helium

Carbon Nanofoams Electrodes

Nanofoam carbon paper is an alternative to woven carbon cloth for electrodes and are superior to woven carbon fiber electrodes in many applications because of their high surface area, low resistance and high relative capacitance. The electrode material is flexible and can be pre-formed into almost any desired shape. They posses about 20% bulk porosity resulting in good flow characteristics, and have both nano and meso porosity. There is virtually no contact resistance within the carbon electrode.

SEM photographs of this composite sheet shows platelets of carbon nanofoam firmly attached to random carbon fibers, interspersed with macro porosity. The macro porosity of the standard sheet is about 20% and the ratio nanofoam to carbon fiber is about 80% by weight.

Click this link to see other magnifications of Carbon Nanofoam Paper

Standard sheets are 3.5 x 10" and 0.010" thick, with thicknesses of 0.005 to 0.050" available.

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Grade Density Surface Area Average Pore Capacitance Resistivity  
  I 0.4-0.5 g/cc ~400 m2/gram ~60 nm 15 - 19 F/gram 0.010 - 0.040
  II 0.4-0.5 g/cc ~600 m2/gram 75-80 nm 28 - 30
0.010 - 0.040

Grade I and II electrodes have been tested in capacitive deionization cells and the electrodes are found to be completely suitable for a range of capacitive deionization (CDI) applications. The electrosorption capacity and rate of ion removal is faster than that observed with other materials.

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