Evolution Energy Minerals Confirms Chilalo Graphite Suits Fuel Cell Market
Key Takeaways
- AETC test work confirmed Chilalo graphite is suited for graphite separator plates in PEM fuel cells, opening high-value applications across data centres, FCEVs, and backup power systems.
- 58% of the DFS concentrate mix is +80 mesh or coarser, including 31.1% at +50 mesh and above — a flake size profile many global deposits cannot match.
- Chilalo's 95–97 wt.% carbon concentrator output meets fuel cell feedstock requirements directly, with no additional purification step required beyond the planned concentrator.
- +50 mesh Chilalo flakes resist oxidation up to 900°C — more than ten times the 70–80°C operating temperature of a typical PEM fuel cell — supporting long plate durability.
- First graphite concentrate production remains targeted for October 2027, subject to funding, approvals, and execution risks, with fuel cell and battery-materials pathways both drawing on the same concentrator output.
Chilalo graphite unlocks fuel cell market potential
Test work conducted by American Energy Technologies Company (AETC) has confirmed that coarse flake graphite from Evolution Energy Minerals’ Chilalo deposit in Tanzania is suited for graphite separator plates used in low-temperature proton exchange membrane (PEM) fuel cells. The results open a potential high-value application pathway spanning data centre power, fuel-cell electric vehicles (FCEVs), and backup power systems. A substantial 58% of the DFS concentrate mix is +80 mesh or coarser, including 31.1% at +50 mesh and coarser, making coarse-flake applications a material part of the project’s value proposition.
Note: AETC’s test work does not constitute a customer relationship, offtake agreement, or commercial commitment of any kind.
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What makes Chilalo’s flakes stand out
AETC’s assessment identified four physical attributes that position Chilalo graphite as a strong candidate for fuel cell separator plate manufacturing:
- Flake size: Coarse fractions at +50 mesh and above, which many deposits globally cannot offer
- Particle thickness: Supporting microscopy recorded selected +80 mesh flakes at approximately 50–75 µm thick
- Oxidation resistance: +50 mesh Chilalo flakes resist oxidation at temperatures up to 900°C, providing at least a ten-fold reserve against the 70–80°C operating temperature of a typical PEM fuel cell
- Low halogen content: Total-solids analysis recorded fluorine below 10 ppm and chlorine of 50–70 ppm across three coarse fractions
Critically, AETC identified 95–97 wt.% carbon concentrate from the planned Chilalo concentrator as suitable feedstock for the fuel cell market. No additional processing step beyond the planned concentrator is required to serve this application.
Emily Schmidt, Business Development and Project Manager, AETC
“We at American Energy Technologies Company are very excited about the results obtained from testing Chilalo graphite. Many deposits around the world lack coarse flakes, which have utility in advanced fuel cell applications for use as back-up power supplies, UPS, electric vehicles, and specialty applications. The fact that Chilalo flake is not only coarse but also contains very thick particles provides an additional benefit that leads to greatly enhanced oxidation resistance in this graphite. That, in turn, facilitates the durability of fuel cell products that use these flakes in the construction of fuel cells. We look forward to testing the benefits of thick flake from Chilalo in fuel cell separator plates as well as other value-added markets.”
Understanding graphite separator plates and why they matter
Graphite separator plates are moulded resin products used inside fuel cells. They are solid plates with engineered perforations and manufactured channels that manage the flow of gases and liquids between the anode and cathode — the two electrodes where the electrochemical reaction occurs.
Producing a high-quality separator plate places strict demands on the graphite feedstock. Large flake size ensures structural integrity in the moulding process. Thick particles improve oxidation resistance, which directly extends the operational life of the plate. High purity (measured in carbon weight percentage) and minimal halogen content are also required, as halogens can degrade the membrane materials inside the cell.
PEM fuel cells operate at relatively low temperatures, typically 70–80°C, making them well suited to stationary power applications like data centres, as well as FCEVs and uninterruptible power supply (UPS) systems. For investors, the key takeaway is that Chilalo’s concentrator-grade output (95–97 wt.% C) means the project could potentially supply this market directly, without the added cost and complexity of a separate purification step.
Market opportunities across data centres, transport and backup power
Three end markets identified in the announcement illustrate the commercial scale of PEM fuel cell adoption:
| Market | Application | Industry Reference |
|---|---|---|
| Data centres | Stationary fuel-cell power supply | Microsoft/Caterpillar/Ballard 1.5 MW demonstration (January 2024); Ballard 15 MW stationary order (June 2026) |
| FCEVs / Transport | PEM fuel cell-powered vehicles | Japan FCEV market; East Tanzanian port-to-Tokyo supply chain alignment |
| Backup / UPS power | Uninterruptible power supply systems | Ballard/Vertiv 400 kW UPS system (February 2025); US DOE records over 500 MW of backup fuel cells deployed |
These industry examples illustrate the scale of fuel cell technology adoption. They do not represent customer relationships or offtake commitments with EV1.
Japan warrants specific mention. The geographic alignment between East Tanzanian ports and Tokyo, a hub for PEM fuel cell vehicle manufacturing, represents a logistics advantage for potential future concentrate supply. Because PEM fuel cell applications consume concentrate-grade graphite rather than purified material, Chilalo’s planned concentrator output is positioned as a direct-supply candidate without additional upgrading.
Chilalo’s credentials across both application domains received further support from an earlier announcement. On 30 July 2026, EV1 reported that AETC had produced 280 kg of Chilalo graphite at 99.99 wt.% carbon from concentrate supplied at 95.7% TGC, under the EU-funded STREAMS battery-materials programme. The fuel cell work sits alongside, not in place of, that battery-materials pathway.
Craig Moulton, Managing Director
“Chilalo’s value extends well beyond battery anodes. With 58% of the DFS concentrate mix in the coarse-flake sizes, identifying applications that reward the quality of those flakes is central to capturing the value of the project.”
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What’s next for EV1 and the Chilalo project
AETC has flagged further testing of Chilalo thick flake specifically in fuel cell separator plates as the next phase of work. This builds on the oxidation resistance and halogen data already in hand, moving from material characterisation toward application-level qualification.
The broader project timeline remains anchored to first graphite concentrate production targeted for October 2027, subject to funding, approvals and execution risks. Fuel cell applications are being pursued alongside the battery-materials programme, with both pathways drawing on the same concentrator-grade output. No commercial agreements are imminent, but the test work adds a validated application layer to a coarse-flake resource that represents more than half of the project’s planned concentrate mix.
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