The Nanode™ is a three-dimensional, nano-structured, porous electrode that will overcome the limitations of today’s batteries by facilitating the use of next generation electrode materials. The Nanode's integrated electrode structure, a thin film of active material spread over a 3D and porous network of fibres, enables the electrode to mitigate the challenges of new active materials, such as volume expansion and dendrite growth.
The Nanode's integrated electrode structure contributes to the relaxation of stress associated with electrode materials undergoing high volume expansion. This is possible because thin films of active material are spread over a 3D and porous network of fibres, rather than stacking particles on a flat copper foil. This enables the electrode structure to deal with the volume expansion of the active material while retaining dimensional stability at the electrode level.
The major advantage of the NanodeTM is its capacity to store the same amount of energy in a smaller volume, compared to commercial lithium ion batteries. This translates into a reduction in volume and cost of the overall battery.
Battery Design Benefits
In a cell assembly, the Nanode replaces the entire anode including active material and current collector foil, leading to a simplified cell design. By integrating the current collector into the Nanode's architecture, it is possible to eliminate the copper foil, the conductive additives and the binders needed for powder-based anodes.
The specifications of the Nanode can be tailored to be combined with a range of existing cathode materials. The use of the Nanode in combination with high energy active materials such as silicon, tin or lithium allow the Nanode to provide an advantage in volumetric and gravimetric energy density.
In addition, the Nanode in combination with high energy materials possesses several benefits for battery assembly and operation including:
- Faster electrolyte wetting into components
- Improved electrode performance
- Simplified cell design and engineering
- Reduced cost
- Increased safety
Anatomy of a Lithium Ion Battery
The Nanode™ retains the flexibility of the original polymeric base substrate after coatings of metal are applied. This property makes it easy to handle and process, especially when compared to conventional particle/foil based electrode materials. The unique concept of the NanodeTM is designed as a drop-in replacement for graphite electrodes to fit with current cell assembly processes.