thesabbathlife wrote: Sorry, I have this video on repeat... just listened to it again. I'm learning a lot.
They take solar panels and use chemical leaching processes on the 6n Si, turning it into 98.3%Si after potassium hydroxide to dissolve the aluminum, then back up to 4n Si after Hydrogen nitride to dissolve silver just to remove components attached to PV, and back down to 98% Si after ball milling due to the organic solvent. 100 nanometers is the smallest SiNP size they can achieve from ball milling. That's a feat for ball milling.
After the chemicsl leaching and ball milling processes above, 3 more steps/ processes are then taken to carbon coat SiNP, make carbon conductive and reduce the particle size again;
- Preparing mixed suspension of PVP, CarbonNT, & SiNP going back up to >20microns
- A "spray dry" process is then used to form particle shape and reduce particle size to 1-20 microns
- Thermal treatment is then applied to powders making carbon conductive and further reducing particle size back to 100 nanometers.
Seems to be quite a number of steps and energy.
And I also missed the part where they think Li-ion battery industry is going to buy their 98% Si 100nm particles for 15-25,000€/kg ($20-30k USD)...I hope they have margins...
Thank you DevelopBC! And thank you for putting bashers in their place!
developbc wrote: Absolutely sabbath..thanks for your great technical DD.
Extremely exciting times coming up for HPQ.
Really feels like Christmas when NSiR is about to be revealed to the world sometime between 1-4 weeks :)
thesabbathlife wrote: If they call this an advancement, NSiR in December is going to be a giant leap for the industry.
thesabbathlife wrote: Huge amounts of information here! In the video below you will get a very lengthy and detailed session on the production of micron sized (not nanometer) low grade (98-99% SiNP) Silcon Carbon Coated ( in this case, ) powders from recycled PV material (99.9999% Si).
I applaud these researchers for their work as this will significantly help the industry out but as advanced as they are they will still be second to us. The only few things they fall short on are;
-Relying on decommissioned PV material which is also not the greenest material to begin with, but good for them to recycle and find value.
-They end up taking a very pure Photovoltaic Silicon and lowering the grade down to 99% Si through a bunch of chemical processes and then ball milling the low grade recycled Si into irregular shaped micron powders.
But my goodness there is a lot of gems in this video for investors such as Micron sized low grade Si powders selling for 300-700€/kg (98-99% Si >100 nanometers).
It also gives you a really good idea of how many steps and, not to dismiss the incredible PYR Engineers complexity, the simplicity of PUREVAP QRR &NSiR, and the Capex it reduces for SiNP w/ carbon coating production.
Oh and crazy how many markets they want to attack with their recycled SiNP's; material for health, material for energy, material for recycling, ceramic 3d printing, powder for food, mining and metals material... congratulations to them for recycling PV material, hopefully their chemical process on stripping materials down to a recycled silicon are environmentally friendly... but most of all thank you for this gem and reaffirming the superiority of HPQ PUREVAP high grade, high quality, high value, resource abundant tailor-made Silicon.
Ouu. I almost forgot that the battery data for SiC anode near the end of the video sure looks pretty good... I'm sure PYR engineers will like to see that if they haven't already and eager to pump that Silicon cocktail out NSiR, if they haven't already haha...