Jan Drechsler | Sixonia: How can you add over 1.6% more active material to an LFP or NMC cathode without compromising performance or increasing cost?

How does graphene's 2D structure give it a fundamental advantage over carbon black and CNTs in battery electrodes?

In battery electrodes, different carbon additives create conductive networks through distinct mechanisms based on their geometry. Carbon black, a standard material, consists of spherical (0D) particles. This morphology creates a network through point-to-point contacts between particles, which requires a relatively high loading to achieve the percolation threshold for effective electronic conductivity throughout the electrode.

Carbon nanotubes (CNTs) offer a 1D geometry, forming long, fibrous pathways for electron transport. This structure is highly efficient at creating long-range conductivity, but CNTs often come with significant disadvantages. They can be very difficult to disperse uniformly within the electrode slurry, leading to agglomeration, and high-performance single-walled CNTs are notoriously expensive, limiting their widespread commercial use.

Graphene, with its 2D sheet-like structure, provides a third and potentially superior approach. The flat flakes are ideal for wrapping around and covering the surfaces of active material particles. This creates a highly distributed, surface-based conductive network rather than relying on point or line contacts, which is a more efficient way to ensure every active particle is electronically connected. Historically, however, challenges in production have limited graphene's viability as a standard industrial additive.

In this short video, you can learn:
* The role and limitations of spherical (0D) carbon black.
* The pros and cons of using 1D carbon nanotubes.
* Why 2D graphene is theoretically ideal for coating active materials.
📋 **Clip Abstract** This clip compares the three main types of carbon conductive additives used in batteries: carbon black, carbon nanotubes, and graphene. It explains how their different geometries (0D, 1D, and 2D) result in distinct mechanisms for creating conductive networks within an electrode.
🔗 Link in comments 👇

Can you make high-performance, easily dispersible graphene without using harsh chemicals or surfactants?

The secret behind eGraphene lies in its unique electrochemical exfoliation production process. This method gently separates layers from a graphite source, resulting in few-layer (1-10 layers), large, and flexible graphene flakes. A key advantage of this technique is that it preserves the pristine nature of the graphene lattice, minimizing defects and leading to exceptionally high intrinsic electrical conductivity.

The core innovation is an in-situ functionalization that occurs simultaneously with the exfoliation. This proprietary step attaches specific functional groups to the graphene flakes as they are being produced. This tailored surface chemistry is crucial, as it allows the eGraphene to be perfectly compatible with water and a wide range of other solvents without requiring any external surfactants or binders for stabilization, creating a true drop-in solution for customers.

This gentle, controlled process yields a material with world-class performance. The electrical conductivity of eGraphene has been measured by a partner at 140,000 Siemens per meter, a world record for a graphene powder. This demonstrates the ability of the electrochemical process to produce high-quality graphene that avoids the performance degradation often seen in other scalable methods like graphene oxide reduction.

In this short video, you can learn:
* The electrochemical exfoliation process for making few-layer graphene.
* How in-situ functionalization enables surfactant-free dispersion.
* The world-record conductivity achieved by this production method.
📋 **Clip Abstract** Discover the proprietary electrochemical exfoliation process behind eGraphene, which includes a unique in-situ functionalization step. This technology produces highly conductive, few-layer graphene that disperses easily in water and other solvents without surfactants.
🔗 Link in comments 👇