This video gives more details about the Samsung new graphene battery, it dates back 6 years.  At 3 min. 39 sec. the image shows that they are using SiO2 with CH4 @ 1000 oC to make SiOx and mix it with graphene to make their graphene balls.

A few months ago, I asked questions related to fumed silica in battery in this post.  At the bottom of it are links to documents related to fumed silica in battey.

In the battery initiative, Bernard is always talking about using QRR silicon and processing it to make SiOx.

Is it a coincidence that in it's 50 cycles press release, HPQ compared it's results to Samsung's INR18650-35E ?

"The graph displayed below (Figure 2, Left) showcases change in capacity results for a Samsung INR18650-35E Battery, and (Figure 2. Right) the changes in capacity during the 50-cycle testing of the 18650 batteries made using Novacium's custom-engineered silicon material blend."