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Zentek Subsidiary Albany Graphite Corp. Achieves Near-Theoretical Anode Performance in Battery Suitability Independent Testing
GUELPH, ON / ACCESS Newswire / December 17, 2025 / Zentek Ltd. (" Zentek " or the " Company ...
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[{"type":"text","content":"Zentek Subsidiary Albany Graphite Corp. Achieves Near-Theoretical Anode Performance in Battery Suitability Independent TestingGUELPH, ON / ACCESS Newswire / December 17, 2025 / Zentek Ltd. (\"Zentek\" or the \"Company\") (Nasdaq:ZTEK)(TSXV:ZEN) announces that its wholly owned subsidiary, Albany Graphite Corp. (\"AGC\"), has achieved near theoretical anode performance in independent lithium-ion battery testing using ultrahigh purity Albany graphite. In four‑industrystandard coin cell tests, carbon coated, spheroidized Albany graphite delivered an average reversible capacity of approximately 367 mAh/g - just 1.3% below the theoretical maximum for graphite - with strong cycling stability and efficient processing. These results indicate that Albany graphite has the potential to serve as a high-performance, natural graphite anode material for lithium-ion batteries, supporting Zentek's strategy to build a value-added position in the North American battery supply chain.RESULTSNear theoretical anode performance: Albany graphite achieved an average reversible capacity 367.35 mAh/g in lithium-ion coin cell tests, within approximately 1.3% of the theoretical maximum for natural graphite (372 mAh/g). This indicates that Albany graphite can deliver energy storage very close to the expected maximum for graphite anodes, making it a strong candidate for high-performance lithium-ion battery applications and supporting longer runtime for end users.Stable cycling, reliability and reproducibility: The material showed very stable performance over approximately 110 cycles as a conductive additive and 110-120 cycles as the main anode active material, with no cell failures and irreversible capacity loss between approximately 7.0% and 8.3%. Average capacity retention was above 94% versus the Li/Li⁺ counter electrode, indicating that Albany graphite can withstand repeated charging with limited degradation, an important requirement for commercial battery production.Efficient use of spheroidization byproduct: High purity spheroidization process \"rejects\" were successfully blended 50/50 with NMC622 cathode active material as a conductive additive, delivering performance comparable to industry benchmarks while enabling nearly full utilization of graphite processed through the spheroidization process. Using this byproduct improves material yie...