Our technology turns a by-product of pulp manufacturing into hard carbon for lithium-ion batteries and other advanced activated carbon products

  • Our patent pending processes have significant advantages because they take a renewable bio-material such as lignin and, through an elegantly simple process, generate high-value hard carbon and activated carbons suitable for lithium-ion batteries and advanced supercapacitors
  • Our hard carbon and activated carbon’s key performance factors are superior to that of widely used commercial graphite and other carbons
Lignin is carbonized before activation to isolate the fixed carbon in preparation for activation and our proprietary carbon enhancing treatment.
Coating of the carbon slurry onto a current collector for the electrodes prior to assembly into an electric double layer supercapacitor (EDLC).
Scanning electron microscope (SEM, magnified at 115,000x) image of the micropore rich surface of CarbonIP's advanced activated carbon.

Lignin-derived carbon

  • Lignin is the most abundant natural aromatic polymer produced from biomass and is one of the most viable precursors to the supercapacitor electrode active materials.
  • Lignin carbon based supercapacitors are capable of superior electrochemical performance at competitive prices relative to coconut shell carbon.
  • Our proprietary manufacturing process uses lignin to produce a supercapacitor grade activated carbon with high:
    • ion-adsorptivity
    • micro-porosity structure and
    • electrical conductivity.
  • Our carbon derives its energy solely from double layer capacitance. Our manufacturing methodologies eliminate oxygen-containing functional groups chemically bound on carbon surfaces, which produces relatively good pseudo-capacitance performance, with minimal loss of conductivity and cyclic stability.

Supercapacitors require special grade carbon

Supercapacitors, unlike batteries can provide millions of charge and discharge cycles at high current and low electrical resistance requiring supercapacitor high-grade carbon for the electrodes.

Despite the emergence of new electrode materials for  supercapacitors, activated carbons are still widely used, due to their relatively low cost and competitive electrochemical performance.

The following physio-chemical properties of carbon are crucial for good performance of supercapacitors:  

• Ion-adsorptive capability
•  Pore size and micro-porosity
• Electrical conductivity
• Interactions with organic based electrolytes
• Particle size
• Ash and oxygen content

Other Research

Photo of testing a pouch LiS battery (45 x 58 mm) using a high-performance potentiostat/galvanostat
  • Lithium Sulfur Battery Development – with unique properties including high microporosity, strong chemical interactions and high resilience to volumetric changes
  • Sulfur Imbedding in Carbon
  • Carbon Enhancement

Advantage of LiS batteries over Li-ion batteries:

  • Energy density of LiS is theoretically 5 times and practically 2-3 times greater than Li-ion batteries
  • LiS batteries do not use rare metals that Li-ion batteries requires
  • LiS batteries are cost-effective, lighter, and safer than Li-ion batteries

CarbonIP’s process

  • Sulfur imbedding process: Cost-effective and scalable process with any activated carbon
  • Sulfur-imbedded lignin-based activated carbon: has achieved up to 85% sulfur content by mass
  • Li-S batteries with sulfur-imbedded lignin-based activated carbon: Demonstrated high cyclability while minimizing the negative formation of polysulfide