CENTURY LITHIUM PROVIDES TECHNICAL UPDATE ON ANGEL ISLAND

Rhea-AI Summary

Century Lithium (OTCQX: CYDVF) has reported significant progress at its Angel Island lithium project's Demonstration Plant in Nevada. The company, in collaboration with Amalgamated Research (ARi), achieved exceptional results in Direct Lithium Extraction (DLE) testing from November 2024 to January 2025, including 91.6% lithium recovery and 575 mg/L eluate grade with a low Na:Li ratio of 0.6:1.

Key technical advancements include increased lithium concentration in eluate to 12-14 g/L using specialty membranes, production of high-purity lithium carbonate (99.87%), and ongoing third-party evaluation for LFP battery applications. The company is also testing thermal pretreatment methods to potentially reduce hydrochloric acid usage in processing. These improvements could significantly reduce capital and operating costs at Angel Island.

["Achieved 91.6% lithium recovery in DLE testing", "Produced high-purity lithium carbonate at 99.87%", "Potential reduction in capital and operating costs", "Increased lithium concentration in eluate to 12-14 g/L", "Testing advances could reduce hydrochloric acid usage in processing"]

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VANCOUVER, BC, May 6, 2025 /PRNewswire/ - Century Lithium Corp. (TSXV: LCE) (OTCQX: CYDVF) (Frankfurt: C1Z) ("Century Lithium" or "the Company") is pleased to provide an update on its 100%-owned lithium project, Angel Island ("Angel Island") near Silver Peak, Nevada and the associated Lithium Extraction Facility ("Demonstration Plant") in Amargosa Valley, Nevada.

"Century Lithium has continued to advance Angel Island through the Company's Demonstration Plant," said Bill Willoughby, Century Lithium President and CEO. "Our Demonstration Plant allows us to improve our technology through various avenues of testing, most recently with ARi, where recent results have exceeded our expectations."

Advancements to the Demonstration Plant

Century Lithium has successfully completed testing at the Demonstration Plant in collaboration with Amalgamated Research, LLC ("ARi") of Twin Falls, Idaho. This testing focused on new developments within the Direct Lithium Extraction ("DLE") portion of Century Lithium's process. These results exceeded expectations for lithium recovery and eluate grade produced from a primary step in the DLE process. The Company believes this could result in a substantial reduction in the estimated capital and operating costs at Angel Island.

Results from DLE Pilot Testing (November 2024–January 2025):

• 328 milligrams per liter ("mg/L") lithium feed concentration
• 91.6% lithium recovery
• 575 mg/L eluate grade with a low Na:Li ratio of 0.6:1

Additional Technical Progress at the Demonstration Plant

• An increase of lithium in eluate to 12 to 14 grams per liter ("g/L") lithium concentration using specialty membranes in the concentration steps following DLE
• Continued operation of the lithium carbonate ("Li₂CO₃") circuit, resulting in 99.87% purity in Li₂CO₃ samples
• Third-party evaluation is underway on Li₂CO₃ samples for use in producing lithium iron phosphate ("LFP") batteries. LFP batteries have a high energy density and long cycle life and are used in solar, energy storage systems and long-range EV applications
• Testing is underway for thermal pretreatment of Angel Island clay with the potential to significantly reduce hydrochloric acid use in the leach stage of processing

Qualified Person

Todd Fayram, MMSA-QP and Senior Vice President, Metallurgy of Century Lithium is the qualified person as defined by National Instrument 43-101 and has approved the technical information in this release.

ABOUT CENTURY LITHIUM CORP.

Century Lithium Corp. is an advanced stage lithium company, focused on developing its wholly owned Angel Island project in Esmeralda County, Nevada, which hosts one of the largest sedimentary lithium deposits in the United States. The Company has utilized its patent-pending process for chloride leaching combined with direct lithium extraction to make battery-grade lithium carbonate product samples from Angel Island's lithium-bearing claystone on-site at its Demonstration Plant in Amargosa Valley, Nevada.

Angel Island is one of the few advanced lithium projects in development in the United States to provide an end-to-end process to produce battery-grade lithium carbonate for the growing electric vehicle and battery storage market. Angel Island is currently in the permitting stage for a three-phase feasibility-level production plan expected to yield an estimated life-of-mine average of 34,000 tonnes per year of carbonate over a 40-year mine-life.

To learn more, please visit centurylithium.com 

ON BEHALF OF CENTURY LITHIUM CORP.

WILLIAM WILLOUGHBY, PhD., PE
President & Chief Executive Officer

NEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICES PROVIDER ACCEPTS RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THE CONTENT OF THIS NEWS RELEASE.

Cautionary Note Regarding Forward-Looking Statements

This release contains certain forward-looking statements within the meaning of applicable Canadian securities legislation. In certain cases, forward-looking statements can be identified by the use of words such as "plans", "expects" or "does not anticipate", or "believes", or variations of such words and phrases or statements that certain actions, events or results "may", "could", "would", "might" or "will be taken", "occur" or "be achieved" and similar expressions suggesting future outcomes or statements regarding an outlook.

Forward-looking statements relate to any matters that are not historical facts and statements of our beliefs, intentions and expectations about developments, results and events which will or may occur in the future, without limitation, statements with respect to the potential development and value of the Project and benefits associated therewith, statements with respect to the expected project economics for the Project, such as estimates of life of mine, lithium prices, production and recoveries, capital and operating costs, IRR, NPV and cash flows, any projections outlined in the Feasibility Study in respect of the Project, the permitting status of the Project and the Company's future development plans.

These and other forward-looking statements and information are subject to various known and unknown risks and uncertainties, many of which are beyond the ability of the Company to control or predict, that may cause their actual results, performance or achievements to be materially different from those expressed or implied thereby, and are developed based on assumptions about such risks, uncertainties and other factors set out herein. These risks include those described under the heading "Risk Factors" in the Company's most recent annual information form and its other public filings, copies of which can be under the Company's profile at www.sedarplus.com. The Company expressly disclaims any obligation to update-forward-looking information except as required by applicable law. No forward-looking statement can be guaranteed, and actual future results may vary materially. Accordingly, readers are advised not to place reliance on forward-looking statements or information. Furthermore, Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability.

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SOURCE Century Lithium Corp.

FAQ

What were the key DLE testing results for Century Lithium (CYDVF) at Angel Island in 2025?

Century Lithium achieved 91.6% lithium recovery with 575 mg/L eluate grade and a Na:Li ratio of 0.6:1 from a feed concentration of 328 mg/L lithium.

What purity level did Century Lithium achieve in its lithium carbonate production?

Century Lithium produced lithium carbonate with 99.87% purity at its Demonstration Plant.

How could Century Lithium's recent technical advances impact project costs?

The company reports that recent DLE testing results could lead to substantial reductions in both capital and operating costs at the Angel Island project.

What is the potential application for Century Lithium's lithium carbonate production?

The company's lithium carbonate is being evaluated for use in lithium iron phosphate (LFP) batteries, which are used in solar, energy storage systems, and long-range EV applications.

What improvements is Century Lithium testing in its processing methods?

The company is testing thermal pretreatment of Angel Island clay to potentially reduce hydrochloric acid use in the leach stage of processing.