Pure silicon replaces carbon
So far, it has only been possible to produce anodes with a small amount of silicon, because they were mainly carbon-based. As an anode material, silicon has ten times the capacity of carbon. Until now, the use of silicon was hampered by the mechanical limitations of the material. LeydenJar’s technology is derived from solar cell production technology (plasma-enhanced chemical vapour deposition, or PECVD).
70% more energy: 1350 Wh/L for more than 100 cycles
Tested pouch cells were built using commercially available battery materials, such as NMC 622 cathodes, and LeydenJar’s silicon anodes. An energy density of 1350 Wh/L was reached at the start of battery life, with these cells demonstrating a cycle life of more than 100 cycles at a C/2 rate. DNV GL has confirmed these results. Looking forward, LeydenJar’s CTO, Yiseop Ahn, expects to be able to significantly improve the cycle life performance.