GM Produces Its Own Cathode Materials, Bypassing China's Battery Supply Chain
nashnova research
GM's Michigan facility has begun mass-production testing of a lithium-rich manganese-based cathode — deliberately sidestepping China's dominant LFP chemistry in what amounts to the first Western attempt to break battery-level supply-chain dependence on China.
What battery did GM pick, and why this one?
The winning formula is an LMR (lithium-rich manganese) battery — a cathode built mainly on manganese with small amounts of lithium and nickel, selected from 18 candidates tested over the past year.
GM battery VP Kurt Kelty says LMR has higher energy density than China's mainstream LFP and lower manufacturing cost.
This means → GM is not trying to outrun China on the same track. It switched tracks — choosing a chemistry no major Chinese producer currently makes at scale, bypassing the supply-chain chokepoint at the source.
Why bypass China's supply chain at all?
On the eve of Xi Jinping's visit to Washington, China cut rare-earth magnet exports to the U.S. by 21% and restricted exports of premium LFP cells and related production equipment.
In plain terms = China is already using its supply chain as leverage. GM's in-house battery push is not a precaution — it is a direct response to supply disruptions that have already begun.
GM is also developing sodium-ion batteries (made from cheap soda ash), another route that deliberately avoids China-controlled raw materials.
How does GM get from lab bench to factory floor?
GM built a three-building battery complex in Warren, Michigan — $900 million total: a research lab → a pilot line producing roughly 50 cells → a large-scale test factory, staged in sequence.
Late last month, workers began coating the formula onto ultra-thin aluminum foil at the test factory, starting batch production of cathode material.
This means → GM deliberately inserted a middle verification stage between "lab" and "gigawatt-scale commercial plant," using a gradual ramp to control risk — a caution born from roughly $6 billion in prior EV write-downs.
The mass-production barrier — who has cleared it?
Apart from Tesla, no major Western automaker has successfully manufactured its own battery cells. Volkswagen tried but has not yet succeeded; Tesla's in-house volume remains relatively limited.
GM plans to deploy manganese-based cells in at least one commercial EV by 2028 if testing goes well, then scale up from there.
This reflects a deeper reality: Western automakers face not just a technology gap in batteries but a full capability chain — from chemistry to scale manufacturing — that must be built from scratch. Whether GM clears this barrier will determine if "de-China" is a real strategy or just a slogan.
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