Conductive Carbon

Conductive carbon is the family of carbon blacks, conductive graphites and nanocarbons used to build electrical pathways through materials that would otherwise insulate.

Most polymers, coatings and electrode binders do not conduct. Making them conduct means dispersing enough carbon through the matrix for particles to touch and form a continuous network. The point at which that network forms is the percolation threshold, and the entire discipline of conductive carbon is about reaching it at the lowest possible loading, because every extra percent of filler costs viscosity, mechanical strength and money.

The Conductive Carbon Family

• Conductive carbon black — high structure, high surface area blacks that form networks at low loadings.
• Recovered carbon black (rCB) — carbon black recovered from end-of-life tires and plastics by pyrolysis, with a far lower carbon footprint than furnace black.
• Conductive graphite — fine graphite powders that add conductivity plus lubricity and thermal transfer.
• Carbon nanotubes — very high aspect ratio, percolating at a fraction of the loading a black requires.
• Graphene and few-layer carbons — sheet geometry for conductivity combined with barrier performance.

Properties That Drive Performance

Structure, usually read through oil absorption number, describes how branched the aggregates are and therefore how easily they interconnect. Surface area governs contact points and binder demand. Aspect ratio explains why nanotubes percolate at loadings an order of magnitude below carbon black. Purity and residual ash matter wherever electrochemistry is involved. And dispersion quality quietly outranks all of them, because an undispersed premium carbon performs worse than a well-dispersed ordinary one.

Where Conductive Carbon Is Used

Lithium-ion electrodes rely on conductive additives to move electrons to every active particle. Conductive and antistatic polymers use carbon to bleed static from packaging, fuel systems and electronics housings. Cable semiconductive shields, conductive coatings, fuel cell components, brushes and electrodes all depend on the same percolation physics. Lubricants and refractories draw on graphite for conductivity alongside heat and wear resistance.

Where Klean Fits

Klean Industries engineers and owns pyrolysis, gasification and carbonization plants that turn waste into fuels, carbon and energy, and produces recovered carbon black and carbon products from end-of-life tires and plastics. Klean also works with nanocarbon materials — graphene, carbon nanotubes and fullerenes — through a marketing and technology relationship with Mitsubishi, a nanocarbon producer. That places both the bulk conductive carbon and the nanocarbon end of the range inside one conversation.