Clemson U. Three-Dimensional Si Anodes
The Clemson University team just released a research paper dated August 31st 2020 named "Three-Dimensional Si Anodes with Fast Diffusion, High Capacity, High Rate Capability, and Long Cycle Life", they are using ~100nm and ~30nm nanosized silicon particules. Who do we know that can make them cheap?
"The solution the team came up with involves the use of tiny silicon “nanosized” particles, which increase stability and provide longer cycle life. Rather than a deck of cards made of graphite, the new batteries uses layers of a carbon nanotube material called Buckypaper, with the silicon nanoparticles sandwiched in between."
https://newsstand.clemson.edu/mediarelations/cu-scientists-create-multipurpose-batteries-that-could-make-it-easier-to-get-around-on-mars/?_ga=2.225672793.23312280.1598883061-1322819783.1593712473
What size of nanosilicone particles?
"Bucky paper or Bucky sandwich electrodes containing Si NPs (diameter of ∼100 nm) exhibits up to ∼1200 and 1900% increases in the gravimetric capacity after 500 cycles at 0.1 C, respectively, when discharged to 0.1 V. Using detailed electrochemical impedance spectroscopy, we show that the diffusion time constants in the Bucky paper and Bucky sandwich electrodes are increased by 2 orders of magnitude compared to that in the bare Cu foil. Furthermore, we demonstrate that the Bucky paper and Bucky sandwich electrodes can withstand high rates up to 4 C and show long cycle life up to ∼500 cycles at 0.1 C. Finally, we show that the Bucky sandwich electrode architecture with smaller diameter Si NPs (∼30 nm) leads to capacities as high as ∼1490 mAh/g (∼1635 mAh/g) at 0.1 C up to 100 cycles when discharged to 0.1 V (0.01 V)."
https://pubs.acs.org/doi/10.1021/acsami.0c05888