TUBALL™ in cathodes improves key battery parameters

Thanks to their unique intrinsic properties, graphene nanotubes outperform alternatives and offer substantial Li-ion battery performance improvements in terms of energy density, safety, discharge power, and adhesion.

Such performance improvements for Li-ion battery cathodes cannot be demonstrated by any traditional conductive materials, such as carbon black or multi wall carbon nanotubes.

How TUBALL™ nanotubes work in cathodes 

TUBALL™ graphene nanotubes (also known as single wall carbon nanotubes) have a set of unique properties, such as a high length-to-diameter ratio, flexibility, and the ability to create well-developed conductive reinforcing networks inside active materials. It allows TUBALL™ nanotubes to boost Li-ion batteries’ performance even at ultralow working dosages.

As it can be clearly seen in the SEM image, even 0.08% TUBALL™ graphene nanotubes in NCM 811 active material perfectly covers the active material surface and connects the particles together.


Being the most conductive material that can be used in the formulation of Li-ion batteries, even a small amount of TUBALL™ graphene nanotubes is enough to reduce internal battery cell resistance (DCR). Stable TUBALL™ networks are maintained inside the cathode material even after multiple battery charge-discharge cycles and battery storage periods, enabling DCR to be maintained at a low level as well—after high temperature (HT) storage and cycling.

The lower battery DCR results in lower temperature build up, and thus a reduced risk of a battery fire. This is a crucial safety benefit made possible by TUBALL™ graphene nanotubes.

Energy density

Less than 0.1% TUBALL™ provides higher energy density. This concentration is 10–60 times lower than required when using multi wall carbon nanotubes or carbon black as a conductive material. In a modern EV battery pack, 5 kg of conductive carbon black can be replaced by just 100 g of TUBALL™.

Discharge power

Thanks to the unmatched conductivity of graphene nanotubes compared with other conductive additives, using TUBALL™ in cathodes makes it possible to achieve fast discharging while also increasing the battery’s capacity.

Cathode adhesion

Nanotube networks hold the cathode material particles together, increasing the bond strength between them.

TUBALL™ is easy to apply in standard battery manufacturing

To facilitate the application of graphene nanotubes in LCO, LFP and NCM-based and other types of cathodes, OCSiAl has developed TUBALL™ BATT—a ready-to-use product containing well-dispersed nanotubes in different liquid carriers that can be simply mixed in during standard manufacturing process. 

The unmatched conductivity of TUBALL™ enables improved battery safety and energy density. TUBALL™ BATT is now available in an optimized, more cost-efficient dispersion form.

To request a sample, click the product card below. 

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Scientific validation

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