Direct:
Silicon-carbon anodes stopped being next-gen a while ago, at least in China. They have shipped in Chinese flagship phones since Honor's Magic5 Pro in 2023, and by the first half of 2025 over 60% of flagship phones in the Chinese market used them. Vivo, Xiaomi (1810.HK), OnePlus, and Honor routinely push 6,000-7,000 mAh into thin bodies with them. Samsung (005930.KS) is reportedly only getting there with the Galaxy S26. Upstream, BTR, Putailai, and Shanshan are already producing silicon anode material at tens of thousands of tons a year.
CATL (300750.SZ) is taking the same chemistry past phones. On April 22 it showed a condensed battery pairing a high-nickel cathode with a low-expansion silicon-carbon anode at 350 Wh/kg, pitched as aviation-grade technology brought down to passenger cars. Its 500 Wh/kg line has flown validation flights on multi-tonne aircraft, and CATL holds a stake in eVTOL maker AutoFlight. It is the same anode chemistry scaled up from phone cells to car packs to aircraft.
The US gap is on anodes specifically. Plenty of battery cell capacity is being built, but the domestic silicon and graphite anode material to feed it is thin. Sila's Moses Lake silicon-anode plant is ramping toward Mercedes/Panasonic offtake, Amprius (AMPX) is shipping 450 Wh/kg cells for Airbus's stratospheric drones, and Enovix (ENVX) is sampling silicon phone cells. Group14 just furloughed workers and delayed its Washington plant. China's November 2025 export controls on cells above 300 Wh/kg and on graphite anode material make that gap more expensive to close. The loudest version of this warning comes from a Sila co-founder's op-ed, so discount the urgency a little, but the deployment figures hold up without it.
If you follow hardware, the consequence is direct. The silicon-carbon battery in the next big-capacity phone is almost certainly built on a Chinese anode chain the US has not matched at scale, and Beijing now controls exports along that chain.
Drafted with AI assistance against parallel reporting.
Sources:
- DigiTimes Asia, silicon-carbon batteries / US-China rivalry (May 17, 2026, paywalled stub)
- Fortune, Berdichevsky (Sila CEO) op-ed on silicon-anode supply chain and China graphite controls (May 14, 2026)
- CATL, six battery innovations / condensed battery 350 Wh/kg (Apr 22, 2026)
- Charged EVs / electrive, CATL condensed cell coverage (Apr 2026)
- TechCrunch, Sila opens Moses Lake silicon-anode plant (Sep 23, 2025)
- GeekWire, Group14 furloughs Washington factory workers (2026)
- BusinessWire, Amprius ships SiCore drone cells (Jul 22, 2025); electrive, AALTO/Amprius stratosphere (Aug 8, 2025)
- Tom's Guide, Honor/OnePlus silicon-carbon battery interview (2025)
- Mayer Brown, China export controls on battery materials >=300 Wh/kg (Oct 2025)
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