POSCO's Argentina Play Is a Solo Shot at Lithium Dominance

The Quiet Korean Bet

Look at the global lithium map and you see two giants: Beijing, with its decades-long overseas resource grab, and Tokyo, channeling state power through JOGMEC and private consortia to secure supplies from Australia to Chile. Korea — the home of LG Energy Solution, Samsung SDI, and SK On — has mostly played a supporting role, buying refined materials and assembling cells while someone else owns the dirt.

POSCO is trying to change that.

The steelmaker-turned-materials-company has quietly built the only Korean-operated lithium brine production facility outside its home market, and it is already generating profit. More strikingly, it did so without the kind of government-to-government dealmaking that defines Chinese and Japanese resource strategy. It went alone into the high-altitude salt flats of Argentina and won.

The Plant at 4,000 Meters

POSCO Argentina’s lithium plant sits in the Salta province, two hours by air from Buenos Aires, at 4,000 meters above sea level — thin enough air that running is prohibited. The Ore muerto salt flat, a vast expanse of ochre-colored crust, hides lithium-rich brine 400 to 500 meters below the surface. That brine, averaging 921 milligrams of lithium per liter, is pumped up and fed into artificial evaporation ponds where the Argentine sun and wind concentrate it to roughly 4 grams per liter — far above the 300 mg/L threshold that makes a deposit commercially viable.

The concentrated brine moves to a processing facility where it is refined into lithium phosphate powder, the white, flour-like intermediate that POSCO ships downhill to its lower-altitude conversion plant, where it becomes lithium hydroxide for NCM battery cathodes. The whole operation started commercial production in March and recorded its first quarterly profit by Q2, according to POSCO’s own reporting.

No Korean company has ever developed a foreign salt lake for lithium before this.

The Crash That Became the Opportunity

The real story is not the plant itself but when POSCO decided to build it. The company identified lithium as a strategic growth vector in 2010 and began developing extraction technology. It acquired the Ore muerto flat for $280 million and incorporated POSCO Argentina in 2018 — right before the lithium bull market peaked.

By 2022, Chinese carbonate lithium was trading above 600,000 yuan per ton. POSCO announced plans to build three more factories in Argentina by 2030, targeting 100,000 tons of annual production. Then the market flipped. Australian supply surged. Electric vehicle demand entered a cooling phase. By June 2023, carbonate prices had collapsed to under 60,000 yuan per ton — a tenth of their peak.

While rivals cut back or cancelled projects, POSCO moved in the opposite direction. Starting in July 2023, it negotiated for the adjacent Ore muerto North flat. By April of this year, it closed the deal for $65 million, adding an estimated 150 million tons of total reserves and bringing the flat’s total area to 287 square kilometers — roughly 47 percent the size of Seoul. At current consumption rates, the combined deposit could support the production of 2.33 million electric vehicles annually.

The strategy is paying off. Lithium prices have recovered above 200,000 yuan per ton, and POSCO’s Argentina operation is no longer a loss-making pioneer project but a cash-positive asset.

Why the West Should Care

The word de-China has become a mantra in battery supply chain circles. American and European policymakers want alternatives to Chinese-controlled refining and processing. But most of the concrete alternatives being discussed — projects in Australia, Canada, Brazil, and Europe — are either in early development or still dependent on Chinese technology and financing.

POSCO offers something rarer: a proven, operating, profit-generating lithium supply chain that is structurally independent of both Beijing and Tokyo.

That is attracting attention. POSCO’s Argentina managing director, Park Hyun, said in August that battery and materials companies worldwide are contacting the firm about supply. The trend aligns with a broader shift — AI data centers are driving demand for battery energy storage systems (BESS), and automakers are reassessing their dependency on Chinese-sourced precursors. POSCO sits at the intersection of both trends.

The company’s roadmap calls for completing a second factory later this year, a third by 2030, and a fourth by 2033. Combined with its Australian operations, POSCO aims for 173,000 tons of annual lithium production — enough to place it among the global top five. If that timeline holds, the company would be the only Korean firm to become a meaningful upstream lithium producer.

The Gap That Defines the Moment

There is a structural difference between POSCO’s approach and the state-backed resource campaigns of China and Japan. Chinese firms operate with direct financing from policy banks and the strategic backing of diplomatic agreements, particularly in Latin America. Japanese companies deploy JOGMEC’s risk-sharing mechanisms and bilateral resource diplomacy to de-risk investments.

Korea has no equivalent apparatus. POSCO’s Argentina play is a corporate decision, not a national strategy. That makes the achievement more remarkable — and also more fragile. Without government guarantee mechanisms, a Korean company operating in a high-altitude South American salt flat faces political, environmental, and regulatory risks that its Chinese and Japanese counterparts often hedge through state channels.

The timing is unusual. The lithium market has spent two years correcting after the 2021-2022 boom, and much of the global coverage has focused on project delays and cost overruns. POSCO’s narrative is different: a counter-cyclical acquisition executed during the trough, now converting into operational cash flow as prices recover and demand diversifies beyond EVs alone.

Whether this model can scale — whether Korea can replicate this kind of independent resource capture in cobalt, nickel, or graphite — remains unanswered. But for now, at 4,000 meters in the Argentine Andes, a Korean company is producing lithium profitably while the world’s resource powers argue over who gets to control the next energy transition.

POSCO did not wait for permission. It bought the flat, built the plant, and waited for the price to come back to it.