08/19/2026
The Strait of Hormuz has been effectively closed since around February 2026. Reporting has so far focused on crude oil. The battery industry is watching something else.
Petroleum coke is a refinery by-product and feedstock for the needle coke synthetic graphite anodes require. When Gulf refineries are disrupted and export routes blocked, petcoke supply tightens. Benchmark Mineral Intelligence confirmed: "as oil output falters, availability of this byproduct will tighten." Calcined petcoke prices rose from ~$400–500/t to $800–900/t. Needle coke saw another 1.2-3.0% increase in July, with a further crunch expected for August.
That is the supply chain disruption. Underlying it is a structural problem.
China produces 83.9% of global synthetic graphite and an estimated 98% of global graphitization capacity. Over 90% of global anode material comes from a single country. Any petcoke disruption is exacerbated by this bottleneck. Furthermore, in February 2026, the US finalized duties on Chinese anode material, raising the tariff burden to 160%–220%. This bottleneck is now compounded by a 160%+ tariff wall, even as supplies run low.
A third complication: battery-grade petcoke now competes directly with aluminum smelting for the same dwindling raw material. JPMorgan forecasts a global aluminum deficit of 2 million tons. These two industries are bidding against each other for shrinking supply—a dynamic unseen before February.
Silicon anodes trace their feedstock to quartz. Zero petroleum dependence. Zero Chinese graphitization bottleneck. Gene Berdichevsky, who helped develop the original Tesla battery, argued in Fortune that the US shouldn't replicate the Chinese graphite supply chain. It should leapfrog it.
SILO Silicon™ by Paraclete Energy is a US-made "drop-in" silicon anode platform, compatible with existing infrastructure, designed to extend autonomous defense system life and eliminate reliance on vulnerable foreign supply chains. Manufactured in Michigan. Petroleum-free. No Chinese graphitization. Battery makers integrate it into existing slurry processes without line modifications.
The 2026 NDAA prohibits DoD from procuring batteries containing FEOC materials, effective January 1, 2028. The Hormuz situation is not merely background noise; it is a real-world demonstration of the very supply chain vulnerability the legislation aims to address.
The graphite chain relies on a refinery by-product, a single country's processing capacity, and a strait that is currently blocked. The silicon chain runs on sand. For program managers working under a tight 18-month qualification schedule, this distinction is no longer theoretical.
https://www.paracleteenergy.com/
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