Could magnesium become the new lithium for electric vehicles?

The Metal Race Beneath the Road: Why Automakers Are Looking Past Lithium

Usagevpn.com – The global push toward electrified transport has made one soft metal the quiet backbone of modern mobility. Lithium-ion cells deliver the punch needed for long-range driving, rapid top-ups at charging stations, and decades of repeated cycling without catastrophic degradation. Yet the very success of that chemistry has exposed a fragile supply chain, and manufacturers are now scanning the periodic table for substitutes that can shoulder the load without repeating lithium’s structural vulnerabilities.

A Supply Chain Under Strain

Opening a new lithium deposit from first geological survey to first tonne of refined carbonate typically consumes between sixteen and eighteen years. Complex permitting regimes, contested exploration rights, and volatile financing conditions stretch that timeline further in many jurisdictions. Hard-rock operations generate substantial tailings, while brine-based extraction in the arid basins where lithium concentrates devours enormous volumes of freshwater, drawing scrutiny from nearby communities and environmental watchdogs alike.

Compounding the physical bottlenecks, lithium spot prices have fallen sharply after a period of oversupply. Exploration budgets and greenfield investment have contracted in response, thinning the pipeline of future production at precisely the moment demand for battery-grade material continues to climb. Geographically, the raw ore clusters in Australia and across South America’s so-called “Lithium Triangle,” while China commands a dominant share of the refining capacity needed to convert raw concentrate into the battery-grade compounds that cell manufacturers actually purchase. That concentration of processing power adds a geopolitical layer to an already precarious supply equation.

Magnesium: The Quiet Challenger

Among the candidates gaining traction in research labs and corporate roadmaps, magnesium stands out for a convergence of practical advantages. The element is markedly cheaper than lithium, occurs in vast quantities both dissolved in seawater and locked in terrestrial mineral deposits, and can store greater energy per unit volume. Crucially, magnesium does not grow the needle-like dendritic crystals that periodically puncture separators inside lithium cells, triggering internal shorts and thermal runaway events. For engineers designing packs that must survive millions of kilometres of daily commuting, that safety margin carries real weight.

At the ionic level, magnesium carries a +2 charge compared with lithium’s +1. That doubled valence translates into higher volumetric capacity, meaning a given battery envelope can hold more usable energy. For vehicle designers constrained by floor-pan geometry and cargo-space targets, the implication is straightforward: smaller packs, lighter vehicles, longer effective range.

Where the World’s Magnesium Actually Sits

The supply picture for magnesium, however, carries its own concentration risk. In 2025, China accounted for roughly 87 to 95 percent of global primary magnesium output, a figure translating into somewhere between 830,000 and 950,000 metric tons of the metal. The bulk of that production draws on extensive dolomite reserves, with the Liaoning province hosting the largest single deposit. Israel ranks second, extracting magnesium principally from the mineral-rich waters of the Dead Sea. Russia and Brazil round out the upper tier of producers, with key deposits located near Satka in the Urals and Brumado in Bahia state, respectively.

That near-total reliance on one national producer mirrors the lithium refining problem in reverse. If automakers pivot wholesale toward magnesium chemistry, they inherit a different but equally concentrated supply dependency, albeit one rooted in a more abundant and geographically dispersed raw element.

Manganese: The Supporting Cast

Not every alternative aims to dethrone lithium outright. Manganese, for instance, is surfacing as a co-ingredient within hybrid cell architectures rather than a standalone replacement. Manganese-based chemistries deliver substantially lower energy density, tolerate fewer recharge cycles before capacity fade, and operate at reduced cell voltages. Under sustained high-power demands—think towing, highway cruising, or rapid acceleration—they falter. In blended configurations, however, manganese can extend cycle life and trim cost per kilowatt-hour without sacrificing the peak performance that pure lithium cells provide.

What the Industry Is Actually Building

Most magnesium battery prototypes remain in laboratory validation, with institutions such as the University of Waterloo advancing fundamental electrochemistry and electrode-material research. On the commercial side, several major OEMs have moved beyond paper studies into active development programmes.

SAIC Motor’s MG brand has introduced a Lithium-Manganese-Oxide (LMO) semi-solid-state SolidCore battery platform, already fitted to the MG4 EV Urban model slated for UK and wider European retail by the close of 2026. The architecture blends manganese’s cost advantage with lithium’s voltage headroom in a semi-solid electrolyte format designed to suppress dendrite growth.

General Motors and LG Energy Solution have set a joint target of 2028 for commercial deployment of advanced lithium manganese-rich (LMR) cells. Those packs lean on elevated manganese fractions to compress material costs while pushing energy density upward, with initial applications aimed at next-generation electric trucks and large SUVs where pack mass and cost per mile are decisive.

Toyota, meanwhile, has committed long-term research funding toward high-capacity manganese chemistries that could eventually displace standard lithium intercalation altogether, though no production timeline has been publicly fixed.

The Bigger Picture

No single metal will single-handedly power the next decade of electrification. What is emerging instead is a diversified portfolio: lithium continuing to anchor high-performance applications, manganese softening cost curves within hybrid designs, and magnesium occupying a longer-horizon niche where its superior volumetric density and intrinsic safety profile justify the engineering investment. The question for policymakers and investors is no longer whether alternatives exist—they demonstrably do—but whether the permitting, financing, and infrastructure pipelines can scale fast enough to keep pace with the vehicles already rolling off assembly lines.