Nexeon has achieved an important milestone in its development of silicon-based anodes for next generation lithium ion (Li-ion) batteries. Cells containing its silicon anode material have successfully completed 500 full charge/discharge cycles without significant fade being observed. The silicon anode material was cycled at a capacity of 1200mAh/g, around four times the capacity achievable using a conventional carbon-based anode technology.
Nexeon produced the cells at its research and development facility using its first generation silicon material. The 500 cycles performance level is regarded by the battery industry as an important performance measure, and is considerably higher than the 300 or so full cycles typically considered necessary for consumer applications such as mobile phones and laptop computers.
In addition to providing higher capacity cells, the superior nature of silicon as an efficient anode material allows less material to be used. This has economic benefits, but can also be important where weight is critical, for example in electric vehicle applications.
“We were confident that we would reach this level of performance, but it still gives our technical team a tremendous boost actually to achieve 500 cycles“, says Dr Scott Brown, CEO of Nexeon. “In fact the test cells continue to clock up more cycles, and this strongly vindicates our belief in the potential of our silicon anodes to provide increased energy capacity while cutting costs and improving battery safety.”
Proving the durability and robustness of silicon anodes is an important first step in making this technology available to battery manufacturers. A future step involves reproducing the results in different cell types, and then optimising the battery configuration to take full advantage of the higher performance silicon anode.
Just a few weeks ago, Nexeon picked up two major Rushlight awards, including the overall Clean Energy Award for “The most significant achievement towards the exploitation and adoption of clean fuels”.