Over the past six months, our in-house testing has focused on demonstrating the performance of our materials for next-generation Lithium-Sulfur (Li-S) batteries. This chemistry is considered one of the most promising next-generation battery technologies, with an energy density potential nearly 10 times higher than the established LFP (Lithium Iron Phosphate) and NMC (Nickel Manganese Cobalt) batteries, which currently dominate the market.
Promising Initial Results
So far, we have made Li-S Coin cells with our CNTs and our carbon flakes (GCF) and compared the performance with reference materials produced via the conventional fossil-based method CVD (Chemical Vapor Deposition):
1. Our cells at 0.5 C rate demonstrated over 70% capacity retention using CNTs and carbon flakes (GCF) as sulfur host after 750 cycles (63% after 1000 cycles for GCF), both of which outperform the fossil CVD-based materials.
2. At higher C-rates, our materials showed even more significant improvements. In fact, we have successfully discharged our cells at rates as high as 6C.
Challenges with Li-S Batteries
The most prominent challenge preventing Li-S battery technology from reaching commercial readiness is to control the dissolution and shuttling effect of polysulfides which negatively impacts battery performance and lifespan.
The most common approach to addressing this issue is the use of conductive nanostructured carbons to physically retain sulfur on the cathode. However, even with this approach, cycle life often remains below expectations. What if an additional chemical bond could be introduced?
This is where our nano-carbons at BCS could make a difference. By incorporating transition metals, our conductive nanostructured carbon materials enhance the performance and the stability of the cells by chemical interaction as well as physical.
Interested in Learning More?
If you’re curious about our materials and approach to Lithium-Sulfur batteries, we would appreciate to hear from you.
Rameez Razaq
Battery Researcher
Email: ramraz@bergencarbonsolutions.com
Phone: +47 922 03 756
Disclaimer
All the test results mentioned above were conducted in our laboratory and have not yet been verified by a third-party. The experiments reflect our best practices at the time of testing and should be considered part of our ongoing technology development efforts.