Lithium Ion Battery 3 times better?

[David B. Benson]

How much of
oilprice.com/Alternative-Energy/Fuel-Cells/Revolutionary-Improvement-Increases-Lithium-Ion-Battery-Capacity-by-300.html
is actual? Why is US$175/kWh a special price for utility scale use?

[Greg Simpson]

It's only twice as good as what Tesla is using (AKA 100% improvement).

There has been a lot of work on using silicon for batteries, maybe this approach will work better. Or maybe it won't.