Observe the noticeable lack of any mention of how many cycles a cell will last at this charge rate. It is well known that ordinary li-ion cell can be charged extremely fast too, as long as you don't charge so fast it heats up rapidly and goes into explosive thermal runaway, but it shortens the lifetime considerably.
> A full-cell incorporating graphene balls increases the volumetric energy density by 27.6% compared to a control cell without graphene balls, showing the possibility of achieving 800 Wh L−1 in a commercial cell setting, along with a high cyclability of 78.6% capacity retention after 500 cycles at 5C and 60 °C.
In your other comment you write:
>the standard is 80% capacity after 500 cycles at the normally specified (1C) charge rate
So I'd say that's pretty good.
Does that mean 5C Charge rate and > 5C Discharge? Because in the EV Market 5C discharge would be borderline enough (I think Teslas 18650 discharge at a peak of 20A per ~3,5Ah Cell so 5C Discharge would be cutting it very close.)
If it's 5C Charge and getting to 500 cycles with higher discharge then...woah.
Heres an "entry" article: https://kabru.eecs.umich.edu/wordpress/wp-content/uploads/St...
and you can follow the references from there (into SciHub etc. if need be.)